Veterinary Hematology Quiz
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Veterinary Hematology Quiz

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Questions and Answers

What is a characteristic finding in blue-smoke Persian cats with lead toxicity?

  • Decreased platelet count
  • Increased neutrophil count with toxic granulation
  • Normal PCV with large nucleated RBCs (correct)
  • High levels of leukocytes
  • Which disorder is described as causing abnormal lysosomal granule formation in granular leukocytes?

  • Myelofibrosis
  • Myelophthisis
  • Lysosomal storage disease (correct)
  • Feline hypereosinophilic syndrome
  • In the context of myelophthisis, which of the following is a potential cause?

  • Autoimmune hemolytic anemia
  • Bone marrow inflammation (correct)
  • Chronic eosinophilia
  • Infection with a viral agent
  • Which feature is NOT typical of neutrophils in cases of lysosomal storage disease?

    <p>Presence of basophilic stippling</p> Signup and view all the answers

    What immunological response results in the production of IgE and subsequent mast cell degranulation?

    <p>Allergies</p> Signup and view all the answers

    Which clinical feature is associated with feline hypereosinophilic syndrome?

    <p>Infiltration of eosinophils into various organs</p> Signup and view all the answers

    Which neoplasms are commonly associated with myelophthisis?

    <p>Tumors involving lymphatic tissues</p> Signup and view all the answers

    What is a distinguishing feature of neutrophils in abnormal granulation syndrome seen in Birman cats?

    <p>Pink-purple granules in the cytoplasm</p> Signup and view all the answers

    What clinical sign is commonly observed in cats that is indicative of possibly severe underlying health issues?

    <p>Lymphadenopathy</p> Signup and view all the answers

    Which condition is associated with granulocytopathy syndrome in Irish setters?

    <p>Impaired bactericidal activity of neutrophils</p> Signup and view all the answers

    What is a common source of eosinopenia in patients?

    <p>Corticosteroid administration</p> Signup and view all the answers

    What may cause transient lymphocytosis in animals?

    <p>Stress or extreme exertion</p> Signup and view all the answers

    Which of the following could lead to a degenerative left shift in blood cell counts?

    <p>Severe bacterial infection</p> Signup and view all the answers

    What condition can result from a light response to neoplasia in the lymphatic system?

    <p>Lymphocytosis</p> Signup and view all the answers

    Which factor can be a common cause of basophilia?

    <p>Parasitic infections</p> Signup and view all the answers

    In which condition do neutrophils exhibit adhesion defects leading to impaired bactericidal activity?

    <p>Granulocytopathy syndrome</p> Signup and view all the answers

    What is the prognosis for cats compared to dogs in myeloproliferative diseases?

    <p>Good in dogs, poor in cats</p> Signup and view all the answers

    What percentage of dogs typically achieve remission with treatment using melphalan and prednisone?

    <p>90%</p> Signup and view all the answers

    What laboratory findings are indicative of megakaryoblastic leukemia in dogs?

    <p>Presence of megakaryoblasts in circulation with giant platelets</p> Signup and view all the answers

    How is polycythemia vera characterized in dogs?

    <p>Increased blood viscosity and dark red mucous membranes</p> Signup and view all the answers

    Which treatment options are commonly recommended for managing polycythemia vera?

    <p>Phlebotomy, hydroxyurea, or radiophosphorus</p> Signup and view all the answers

    What characteristics are associated with primary thrombocythemia?

    <p>Splenomegaly and platelet function abnormalities</p> Signup and view all the answers

    Which cell type is associated with acute myelomonocytic leukemia (M4)?

    <p>Monoblasts</p> Signup and view all the answers

    Which condition is characterized by intramedullary and extramedullary hematopoiesis?

    <p>Idiopathic myelofibrosis</p> Signup and view all the answers

    What is a characteristic cytological finding in acute monocytic leukemia (M5)?

    <p>Basophilic cytoplasm without granulation</p> Signup and view all the answers

    What finding would help differentiate chronic granulocytic leukemia from a leukemoid reaction?

    <p>Markedly elevated leukocyte count with moderate anemia</p> Signup and view all the answers

    Which cytochemical stain is most likely positive in acute monocytic leukemia (M5)?

    <p>Non-specific esterase</p> Signup and view all the answers

    What condition may be observed in about 20% of dogs with monoclonal gammopathy?

    <p>Hypercalcemia</p> Signup and view all the answers

    What condition is commonly associated with erythroleukemia (M6) in cats?

    <p>Feline leukemia virus (FeLV)</p> Signup and view all the answers

    What hematological finding could indicate a nonregenerative anemia in dogs with acute myelomonocytic leukemia?

    <p>Normocytic and normochromic red blood cells</p> Signup and view all the answers

    Which of the following is NOT a differential for monoclonal gammopathy?

    <p>Chronic lymphocytic leukemia</p> Signup and view all the answers

    What is a potential cause of epistaxis or gingival bleeding in the context of leukemic disorders?

    <p>Thrombocytopenia</p> Signup and view all the answers

    What is a consequence of excessive heparin administration?

    <p>Increased risk of bleeding due to decreased clotting</p> Signup and view all the answers

    Which factors require Vitamin K for activation?

    <p>Factor VII, IX, and X</p> Signup and view all the answers

    What is the normal clotting time for dogs during a specific coagulation test?

    <p>60 to 120 seconds</p> Signup and view all the answers

    Which type of genetic transmission is associated with hemophilia?

    <p>X-linked recessive</p> Signup and view all the answers

    What pathway does heparin primarily influence in coagulation?

    <p>Intrinsic pathway by increasing antithrombin III activity</p> Signup and view all the answers

    What is the role of fibrin degradation products in disseminated intravascular coagulation (DIC)?

    <p>They interfere with the fibrin clot formation</p> Signup and view all the answers

    During a buccal mucosa bleeding time test, what is NOT typically required?

    <p>Inverting the test tube to mix blood with a coagulation activator</p> Signup and view all the answers

    What does the activated partial thromboplastin time (APTT) primarily assess?

    <p>Intrinsic pathway of coagulation</p> Signup and view all the answers

    What is a possible cause of decreased platelet production in dogs?

    <p>Cyclic hematopoiesis in collies</p> Signup and view all the answers

    Which parasites may be responsible for gastrointestinal infections in dogs?

    <p>Trichuris vulpis</p> Signup and view all the answers

    Which of the following factors is least likely to contribute to lymphopenia?

    <p>Hyperthyroidism</p> Signup and view all the answers

    Which condition is typically associated with reactive thrombocytosis in dogs?

    <p>Chronic inflammation</p> Signup and view all the answers

    What is a potential consequence of lymphatic injury such as in chylothorax?

    <p>Lymphopenia</p> Signup and view all the answers

    Which of the following drugs is known to cause neutropenia?

    <p>Methimazole</p> Signup and view all the answers

    What clinical sign is most commonly associated with acute lymphoblastic leukemia (ALL) in dogs?

    <p>Anorexia and splenomegaly</p> Signup and view all the answers

    Which infectious agent is associated with both direct tissue destruction and lymphopenia?

    <p>Canine parvovirus</p> Signup and view all the answers

    Which factor is linked to Disseminated Intravascular Coagulation (DIC) in dogs?

    <p>Hyperadrenocorticism</p> Signup and view all the answers

    What is the primary effect of corticosteroid administration on white blood cell populations?

    <p>Decrease in lymphocytes</p> Signup and view all the answers

    What is a common complication observed after canine distemper virus vaccination?

    <p>Transient thrombocytopenia</p> Signup and view all the answers

    Which of the following is a typical finding in cases of spleen enlargement affecting platelet sequestration?

    <p>Decreased platelet count</p> Signup and view all the answers

    Which condition is least likely to be directly influenced by drug administration as a cause of lymphopenia?

    <p>Cough suppressants</p> Signup and view all the answers

    Which of the following breeds is associated with congenital lymphopenia?

    <p>Basset hound</p> Signup and view all the answers

    What cytological test may be necessary for differentiating acute lymphoblastic leukemia from other leukemia forms?

    <p>Cytochemical stains</p> Signup and view all the answers

    Which of the following conditions is closely related to decreased lymphocyte production due to lymphoid tissue destruction?

    <p>Malignant neoplasia</p> Signup and view all the answers

    What clinical signs are commonly associated with drug-induced cytopenia in cats?

    <p>Lethargy from anemia and hemorrhage</p> Signup and view all the answers

    Which drug is known to cause dyserythropoiesis and macrocytosis in felines?

    <p>Chloramphenicol</p> Signup and view all the answers

    What condition can lead to folate deficiency resulting in macrocytic nonregenerative anemia?

    <p>Intestinal malabsorption</p> Signup and view all the answers

    Which of the following changes is typically associated with acute myeloid leukemia in cats?

    <p>Severe nonregenerative anemia and thrombocytopenia</p> Signup and view all the answers

    What type of cell morphological changes may be seen in cases of drug-induced dysplastic changes?

    <p>Nuclear fragmentation and macrocytosis</p> Signup and view all the answers

    Which supportive treatment may benefit patients with hematological changes due to FeLV?

    <p>Prednisone and erythropoietin</p> Signup and view all the answers

    What hematological abnormality is associated with malabsorption of vitamin B12 in giant schnauzers?

    <p>Dysplastic erythroid changes</p> Signup and view all the answers

    In what way can folate deficiency manifest in blood cell parameters?

    <p>Macrocytic nonregenerative anemia</p> Signup and view all the answers

    What laboratory finding is commonly associated with disseminated intravascular coagulopathy (DIC)?

    <p>Increased fibrin degradation products</p> Signup and view all the answers

    Which virus is noted for causing normochromic, normocytic to macrocytic anemia in cats?

    <p>Feline leukaemia virus (FeLV)</p> Signup and view all the answers

    What is a potential underlying cause of nonregenerative anemia in cats?

    <p>Hypophosphatemia due to diabetes mellitus</p> Signup and view all the answers

    In the context of microangiopathic hemolytic anemia, which finding is NOT typically observed?

    <p>Increased hemoglobin levels</p> Signup and view all the answers

    What imaging finding might be observed in peripheral blood due to a Babesia canis infection?

    <p>Piroplasms in red blood cells</p> Signup and view all the answers

    Which condition is associated with significant red blood cell hypoplasia aside from feline leukemia virus?

    <p>Feline immunodeficiency virus (FIV)</p> Signup and view all the answers

    What hematological change is commonly associated with thrombocytopenia in DIC?

    <p>Hemolytic anemia</p> Signup and view all the answers

    Which of the following is a characteristic of anemia caused by feline leukemia virus (FeLV)?

    <p>Normochromic, normocytic to macrocytic</p> Signup and view all the answers

    Which statement correctly describes the expression of hemophilia in males and females?

    <p>Males express hemophilia, while females are asymptomatic carriers.</p> Signup and view all the answers

    Which factor deficiency is primarily responsible for Hemophilia A?

    <p>Factor VIII</p> Signup and view all the answers

    Which breed is noted to have the highest incidence of Hemophilia A?

    <p>German Shepherds from European stock</p> Signup and view all the answers

    In which animal is factor XII deficiency commonly seen, though it does not lead to bleeding?

    <p>Cats</p> Signup and view all the answers

    What is the primary indicator of von Willebrand disease (vWD) in dogs?

    <p>It is a common hereditary bleeding disorder occurring in both sexes.</p> Signup and view all the answers

    Which coagulation factor deficiencies could lead to prolonged bleeding times?

    <p>Combined deficiencies of factors II, VII, IX, and X</p> Signup and view all the answers

    What is the role of the toenail bleeding time test in assessing coagulation?

    <p>It should only be performed if the animal is sedated or anesthetized.</p> Signup and view all the answers

    Which deficiency could be manifested as bleeding issues in Labrador Retrievers, while combined deficiencies can be fatal?

    <p>Combined deficiencies of factors II, VII, IX, and X</p> Signup and view all the answers

    Which of the following conditions is associated with anemia and the presence of teardrop-shaped organisms in red blood cells?

    <p>B. gibsoni infection</p> Signup and view all the answers

    What is the primary treatment for feline porphyria?

    <p>Supportive care and blood transfusions</p> Signup and view all the answers

    Hereditary stomatocytosis in Alaskan malamutes is transmitted in which manner?

    <p>Autosomal recessive</p> Signup and view all the answers

    What clinical sign is indicative of hemolytic crises associated with hemolytic anemia?

    <p>Acute hemolytic crisis</p> Signup and view all the answers

    Which organism is associated with the observed signet ring-shaped forms in red blood cells?

    <p>B. gibsoni</p> Signup and view all the answers

    What is a common source of eccentrocytosis in dogs?

    <p>Onion and garlic ingestion</p> Signup and view all the answers

    What laboratory test can be used for diagnosing feline porphyria?

    <p>Immunofluorescent antibody test</p> Signup and view all the answers

    Which of the following treatments is recommended for removing the source of oxidants in cases of eccentrocytosis?

    <p>Blood transfusions and supportive care</p> Signup and view all the answers

    Which clinical sign is most typically associated with conditions causing thrombocytopenia?

    <p>Petechiae</p> Signup and view all the answers

    Which of the following laboratory findings would most likely be present in a case of disseminated intravascular coagulation (DIC)?

    <p>Leukocytosis with left shift</p> Signup and view all the answers

    What treatment is recommended when the packed cell volume (PCV) falls below 15%?

    <p>Transfusion therapy</p> Signup and view all the answers

    Which factor is critical in deciding whether to initiate prophylactic therapy with heparin or aspirin?

    <p>Risk of thromboembolism</p> Signup and view all the answers

    Which condition is most likely indicated by the presence of spherocytosis in laboratory findings?

    <p>Immune-mediated hemolytic anemia</p> Signup and view all the answers

    What laboratory test result is most likely to be positive in cases of immune-mediated thrombocytopenia?

    <p>Coombs' test</p> Signup and view all the answers

    Which of the following is a key sign of hypoxic damage associated with elevated liver enzymes?

    <p>Anemia</p> Signup and view all the answers

    What is a significant consequence of high levels of bilirubin in the blood?

    <p>Need for aggressive therapy</p> Signup and view all the answers

    What is the main function of the spleen in hematologic health?

    <p>Filtration of peripheral blood and removal of aged cells</p> Signup and view all the answers

    What is a typical clinical sign of immune-mediated thrombocytopenia (IMT)?

    <p>Pale mucous membranes and epistaxis</p> Signup and view all the answers

    In the diagnosis of IMT, what platelet level is indicative of severe thrombocytopenia?

    <p>Less than 25,000/ L</p> Signup and view all the answers

    What is the prognosis for severe cases of splenic disorders?

    <p>Guarded with unpredictable relapses</p> Signup and view all the answers

    What distinguishes the canine spleen from the feline spleen?

    <p>The presence of sinusoids in canine spleen versus nonsinusoidal in feline spleen</p> Signup and view all the answers

    What can typically be seen in a chemistry profile for a dog with IMT?

    <p>Normal coagulation profiles</p> Signup and view all the answers

    Which lymphocyte type is primarily located in the germinal center of the spleen's white pulp?

    <p>B lymphocytes</p> Signup and view all the answers

    What condition is characterized as having unpredictable relapses that complicate prognosis?

    <p>Immune-mediated thrombocytopenia</p> Signup and view all the answers

    What is a typical clinical sign of multiple myeloma in dogs?

    <p>Anorexia</p> Signup and view all the answers

    Which test is most helpful in assessing the intrinsic clotting system?

    <p>Activated partial thromboplastin time (APTT)</p> Signup and view all the answers

    Which of the following conditions might be mistaken for hypereosinophilia due to similar features?

    <p>Allergies</p> Signup and view all the answers

    Basophilia in the blood may indicate which associated condition?

    <p>Mast cell leukemia</p> Signup and view all the answers

    What complication may arise if blood is sampled from the jugular vein?

    <p>Hematoma formation</p> Signup and view all the answers

    What is a defining cytochemical staining characteristic in basophilic leukemia?

    <p>Cytochemical stain with -exonuclease</p> Signup and view all the answers

    What hematological anomaly is specifically associated with feline eosinophilic conditions?

    <p>Dacryocystosis and poikilocytosis</p> Signup and view all the answers

    Which statement regarding eosinophils in conditions related to FeLV is accurate?

    <p>Eosinophils can infiltrate lymph nodes and spleen</p> Signup and view all the answers

    What is the recommended action before transfusing blood products?

    <p>Ensure blood type and crossmatch compatibility in cats</p> Signup and view all the answers

    Which drug therapy is only effective when there is a specific deficiency?

    <p>Vitamin K for clotting disorders</p> Signup and view all the answers

    What is the lasting treatment duration for long-acting anticoagulants like brodifacoum?

    <p>4 to 6 weeks</p> Signup and view all the answers

    What combination of products is equivalent to fresh whole blood?

    <p>Stored whole blood and plasma products</p> Signup and view all the answers

    What underlying disorder may impair clotting ability and requires specific therapy?

    <p>Hyperadrenocorticism</p> Signup and view all the answers

    What is the risk associated with not adhering to proper transfusion protocols?

    <p>Higher risk of transfusion reactions</p> Signup and view all the answers

    Which blood type dogs are recommended as universal donors?

    <p>Dogs negative for DEA 1 and DEA 7</p> Signup and view all the answers

    Which treatment should not be given prior to a blood transfusion?

    <p>Corticosteroids for inflammation</p> Signup and view all the answers

    What hematological finding is characteristic of megakaryoblastic (M7) leukemia in dogs?

    <p>Elevated platelet granulation abnormalities</p> Signup and view all the answers

    Which treatment is commonly indicated for managing polycythemia vera?

    <p>Phlebotomy</p> Signup and view all the answers

    Chronic granulocytic (neutrophilic) leukemia can be differentiated from leukemoid reactions by observing which finding?

    <p>Increased number of progranulocytes</p> Signup and view all the answers

    What is a significant indicator of primary thrombocythemia?

    <p>Functional abnormalities in platelets</p> Signup and view all the answers

    In idiopathic myelofibrosis, which cell type typically infiltrates the spleen and liver?

    <p>Granulocytic cells</p> Signup and view all the answers

    What clinical sign commonly associated with chronic myeloproliferative diseases can also complicate diagnosis?

    <p>Thrombosis and bleeding episodes</p> Signup and view all the answers

    Which of the following accurately describes the prognosis of lymphoproliferative disorders in dogs compared to cats?

    <p>Good prognosis in dogs, poor in cats</p> Signup and view all the answers

    What is the expected blood value range associated with polycythemia vera?

    <p>PCV 65% to 82%</p> Signup and view all the answers

    What is the implication if vWF concentration is below the reference range in a dog?

    <p>The dog may express or carry von Willebrand disease (vWD).</p> Signup and view all the answers

    Which of the following coagulation tests indicates the function of the intrinsic pathway?

    <p>Activated Partial Thromboplastin Time (APTT)</p> Signup and view all the answers

    What clinical sign is associated with Disseminated Intravascular Coagulation (DIC)?

    <p>Schistocytes in blood smear</p> Signup and view all the answers

    Which factor deficiency is commonly acquired and linked to liver dysfunction?

    <p>Factor VIII</p> Signup and view all the answers

    What combination of findings is associated with DIC?

    <p>Decreasing platelet count and elevated aPTT</p> Signup and view all the answers

    In what situation would vitamin K deficiency be expected?

    <p>Following exposure to anticoagulant rodenticides</p> Signup and view all the answers

    Which statement is true regarding coagulation factors in relation to acquired deficiencies?

    <p>Liver disease can lead to decreased production of coagulation factors.</p> Signup and view all the answers

    What is a critical change observed in blood tests during DIC?

    <p>Presence of fibrin degradation products</p> Signup and view all the answers

    Which clinical sign is a common indicator of thromocytopenia?

    <p>Petechiae</p> Signup and view all the answers

    What laboratory finding is typically associated with conditions leading to severe bleeding?

    <p>Leukocytosis with left shift</p> Signup and view all the answers

    How is the presence of spontaneous autoagglutination of RBCs typically indicated?

    <p>Through Coombs' test</p> Signup and view all the answers

    What is the primary treatment approach for patients with severe coagulation factor deficiencies?

    <p>Fresh whole blood transfusion</p> Signup and view all the answers

    Which of the following clinical signs is likely seen in cases of neoplasia such as lymphoma or hemangiosarcoma?

    <p>Sepsis</p> Signup and view all the answers

    What is a critical component of diagnosing bleeding disorders in patients?

    <p>A combination of clinical signs and laboratory findings</p> Signup and view all the answers

    What is an important condition to consider if bilirubin levels exceed 3 mg/dL in a patient?

    <p>Significant liver damage</p> Signup and view all the answers

    What is a common complication associated with thrombocytopenia indicating the need for urgent care?

    <p>Thromboembolism</p> Signup and view all the answers

    Which coagulation test specifically detects issues within the extrinsic and common pathways?

    <p>Prothrombin time (PT)</p> Signup and view all the answers

    What condition is primarily associated with a complete lack of von Willebrand factor (vWF)?

    <p>Type 3 von Willebrand disease (vWD)</p> Signup and view all the answers

    Which subtype of von Willebrand disease (vWD) is associated with low vWF concentration but normal vWF structure?

    <p>Type 1 vWD</p> Signup and view all the answers

    What is a common complication that exacerbates bleeding in dogs with von Willebrand disease (vWD)?

    <p>Concurrent thrombocytopenia</p> Signup and view all the answers

    Which coagulation test measures deficiency and dysfunction specifically related to fibrinogen?

    <p>Thrombin clotting time (TCT)</p> Signup and view all the answers

    What is one aspect of treating patients at risk of transfusion reactions?

    <p>Use stored whole blood or packed RBCs with plasma products</p> Signup and view all the answers

    In disseminated intravascular coagulopathy (DIC), what is primarily caused by the activation of the coagulation cascade?

    <p>Clot formation and thrombosis</p> Signup and view all the answers

    In canines, which of the following represents characteristics of universal donors?

    <p>Dogs negative for DEA 1 and DEA 7</p> Signup and view all the answers

    Which breed is mentioned as having a higher incidence of immune-mediated hemolytic anemia (IMHA)?

    <p>Cocker spaniels</p> Signup and view all the answers

    What is the recommended duration of treatment with vitamin K1 for patients with warfarin toxicity?

    <p>1 week</p> Signup and view all the answers

    What factor is critical in the management of thrombotic disseminated intravascular coagulopathy (DIC)?

    <p>Heparin therapy</p> Signup and view all the answers

    Which substance should not be used prior to a transfusion of blood products?

    <p>Prednisone</p> Signup and view all the answers

    What type of therapy is beneficial specifically when there's a vitamin K deficiency due to rodenticide toxicity?

    <p>Vitamin K therapy</p> Signup and view all the answers

    Which of the following is a common underlying disorder that may impair clotting ability?

    <p>Hyperadrenocorticism</p> Signup and view all the answers

    What should be used in feline blood transfusions to ensure compatibility?

    <p>Blood that is crossmatch compatible</p> Signup and view all the answers

    What is a main consequence of administering excessive heparin?

    <p>Increased risk of hemorrhage</p> Signup and view all the answers

    Study Notes

    Lead Toxicity

    • Can occur in blue-smoke Persian cats with yellow eyes
    • Anemia, basophilic stippling, and nucleated red blood cells are often observed

    Myelophthisis

    • Abnormal cellular infiltrates crowd the bone marrow
    • Suppresses hematopoiesis
    • Caused by neoplasia from primary hemolymphatic tumors or metastatic tumors
    • Myelofibrosis occurs when bone marrow is damaged by inflammation, necrosis, neoplasia, or other conditions

    Lysosomal Storage Disease

    • Inherited disorder caused by enzyme deficiency
    • Neutrophils contain coarse, red-purple granules when stained, differentiating it from toxic neutrophils
    • Urine test for glycosaminoglycans and cell enzyme activity tests can be used for diagnosis

    Abnormal Granulation Syndrome in Birman Cats

    • Pink-purple granules within neutrophil cytoplasm are observed, but no clinical signs are present

    Neutrophilia

    • Physiologic neutrophilia is often transient and more common in cats
    • Corticosteroid administration also leads to neutrophilia
    • Inflammation, both infectious and noninfectious, can cause neutrophilia
    • Neoplasia such as metastatic fibrosarcoma or renal tubular carcinoma can cause neutrophilia
    • Severe abscessation such as pyometra can cause neutrophilia
    • Immune-mediated conditions such as systemic lupus erythematosus can cause neutrophilia
    • Granulocytopathy syndrome in Irish setters causes neutrophil dysfunction

    Neutropenia

    • Congenital cyclic neutropenia: inherited disorder of gray collies, cyclic decrease in neutrophils, platelets, and monocytes
    • Infection causes a degenerative left shift with increased erythroid precursors

    Eosinophilia

    • Allergies, tumors, and feline hypereosinophilic syndrome can cause eosinophilia

    Eosinopenia

    • Exogenous or endogenous corticosteroids can cause eosinopenia

    Basophilia

    • Parasites such as heartworms or hookworms can cause basophilia
    • Allergies cause IgE production with increased mast cells and basophils
    • Hyperlipemia can result in basophilia
    • Systemic mastocytosis can cause basophilia

    Lymphocyte Disorders

    • Lymphocytosis can be transient due to stress, infectious due to antigen stimulation, or neoplastic
    • Leukemic cells have pale basophilic cytoplasm containing small, red granules

    Leukemic Disorders

    • Acute myeloid leukemia (AML) involves the stem cells for both granulocytes and monocytes
    • Chronic myeloid leukemia (CML) involves an increase in progranulocytes to metamyelocytes in blood and bone marrow
    • Eosinophilic leukemia is rare

    Multiple Myeloma

    • Rare, plasma cell neoplasia
    • Often associated with bone destruction, especially in the vertebrae, ribs, and pelvis
    • Lameness, epistaxis, or gingival bleeding may occur due to bone pain or thrombocytopenia
    • Most patients have monoclonal gammopathy
    • Often associated with nonregenerative, normocytic, or normochromic anemia. Some also have thrombocytopenia
    • Diagnosis is based on the presence of plasmacytosis, evidence of osteolytic bone lesions, and serum or urine myeloma proteins

    Polycythemia Vera

    • Rare disorder with increased hematocrit
    • Blood is hyperviscous, and mucous membranes are dark red
    • Treat with phlebotomy, hydroxyurea, or radiophosphorus

    Primary Thrombocythemia

    • Rare proliferation of platelets, characterized by splenomegaly and platelet function abnormalities
    • Treat with melphalan, hydroxyurea, or radiophosphorus
    • May transform to chronic myelogenous leukemia

    Idiopathic Myelofibrosis

    • Uncommon disorder involving intramedullary and extramedullary hematopoiesis with reactive or secondary marrow fibrosis
    • Granulocytic and megakaryocytic cells infiltrate the spleen and liver
    • Leukoerythroblastic reaction often observed

    Disseminated Intravascular Coagulation (DIC)

    • DIC causes microangiopathic hemolytic anemia due to fibrin deposition in small blood vessels.
    • Thrombocytopenia, decreased clotting factors, and increased fibrin degradation products are associated with DIC.
    • DIC can be caused by infection, neoplasia, heartworm disease, pancreatitis, and shock.

    Hypophosphatemia

    • Hypophosphatemia can cause hemolysis in cats with diabetes mellitus and hepatic lipidosis.

    Nonregenerative Anemia

    • Infectious agents:
      • Feline leukemia virus (FeLV) causes a normochromic, normocytic to macrocytic anemia.
      • Severe red blood cell hypoplasia is common with FeLV.
      • Other viruses like feline infectious peritonitis (FIP), feline immunodeficiency virus (FIV), feline panleukopenia virus, canine parvovirus, and E. canis can also cause nonregenerative anemia.
    • Corticosteroids:
      • Exogenous or endogenous corticosteroids can decrease lymphocytes.
      • Lymphopenia usually resolves within a few days of discontinuing corticosteroids.
    • Infectious agents:
      • Infectious agents like FeLV, FIV, parvovirus, and distemper virus may cause lymphoid tissue destruction.
    • Lymphatic injury:
      • Conditions like chylothorax, lymphangiectasia, or protein-losing enteropathy can cause loss of lymph fluid and lymphopenia.
    • Congenital lymphopenia:
      • Congenital lymphopenia occurs in basset hounds and is associated with severe bacterial infections.

    Mastocytosis

    • Mastocytosis occurs secondary to mast cell tumors.
    • Bone marrow is rarely invaded by mast cells.

    Thrombocytopenia

    • Immune-mediated injury:
      • Immune-mediated thrombocytopenia can result from the destruction of platelets by antibodies.
    • Increased platelet consumption or utilization:
      • Infectious agents like Ehrlichia canis, Ehrlichia ewingii, Anaplasma platys, and Anaplasma phagocytophilum can cause increased platelet consumption.
      • Canine distemper virus vaccination can cause transient thrombocytopenia around a week after vaccination, sometimes lasting for weeks.
      • Hemorrhage, DIC, and splenic sequestration can also contribute to thrombocytopenia.
    • Decreased platelet production:
      • Congenital thrombocytopenia can be associated with cyclic hematopoiesis in Collie dogs.
      • Infectious diseases like distemper virus, parvovirus, FeLV, and E. canis can also decrease platelet production.
      • Drugs like cisplatin, cyclophosphamide, chlorambucil, doxorubicin, and hydroxyurea can suppress platelet production.

    Thrombocytosis

    • Physiologic thrombocytosis:
      • Heavy exercise or epinephrine release can cause physiologic thrombocytosis.
    • Reactive thrombocytosis:
      • Acute blood loss, iron deficiency anemia, trauma, surgery, inflammation, splenectomy, and hyperadrenocorticism can trigger reactive thrombocytosis.

    Drug-induced Thrombocytopenia

    • Drugs like chloramphenicol, vincristine, cyclophosphamide, and azathioprine can cause dyserythropoiesis with macrocytosis, nuclear fragmentation, sideroblastosis, megaloblastoid changes, and siderocytosis.
    • These changes are not associated with folate deficiency, and normal morphology usually returns after stopping drug therapy.

    Nutritional Thrombocytopenia

    • Vitamin B12 malabsorption:
      • Malabsorption of vitamin B12 in giant schnauzers can cause erythroid dysplastic changes with neutrophilic hypersegmentation.
    • Folate deficiency:
      • Neoplasia, intestinal malabsorption, and liver disease can lead to folate deficiency, resulting in a macrocytic nonregenerative anemia.
      • Anticonvulsants, some antibiotics, and antineoplastic agents can inhibit folate metabolism causing megaloblastic changes.

    Coagulation Disorders

    • Hemophilia A:
      • Caused by a defect in the factor VIII gene.
      • More common than hemophilia B.
      • German Shepherd dogs (especially from European stock) have a high prevalence of Hemophilia A.
    • Hemophilia B:
      • Caused by a defect in the factor IX gene.
      • Females are asymptomatic carriers.
    • Deficiencies of other factors:
      • Deficiencies in factors XI, X, VII, II, and fibrinogen can occur.
    • Factor XII deficiency:
      • This is common in cats but doesn’t cause bleeding.
    • Combined deficiency of factors II, VII, IX, and X:
      • Reported in Devon Rex cats and Labrador Retrievers.
    • von Willebrand disease (vWD):
      • The most common hereditary bleeding disorder in dogs.
      • Affects both males and females.
      • Breeds with high vWD prevalence include Doberman Pinschers, German Shepherd Dogs, and Scottish Terriers.

    Leukemic Disorders

    • Lymphoid leukemia:
      • Acute lymphoblastic leukemia (ALL):
        • Abnormal proliferation of immature lymphoblasts in bone marrow or blood.
        • Rapidly progressive with poor response to therapy.
        • Clinical signs include fever, abdominal pain, anorexia, splenomegaly, and pale mucous membranes.
        • Most cases have leukocytosis with abnormal lymphocytes.
        • About 10% have aleukemic leukemia (bone marrow involvement without peripheral blood involvement).
        • Cytochemical stains may be necessary to differentiate from other leukemias.
        • Associated with FeLV in cats. -Chronic lymphocytic leukemia (CLL):
        • Characterized by an accumulation of mature lymphocytes in the blood, bone marrow, and lymph nodes.
        • Usually occurs in older animals.
        • Can be asymptomatic or cause signs like weight loss, lethargy, and enlarged lymph nodes.
        • Prognosis is variable, depending on the stage and type of CLL.
    • Myeloid leukemia:
      • Acute myeloid leukemia (AML):
        • Classified as M1 to M7 depending on which blast cells predominate in the bone marrow.
        • Acute myeloblastic leukemia (M1, M2) is relatively common, often associated with FeLV in cats.
        • Severe nonregenerative anemia, thrombocytopenia, and leukocytosis are common.
        • Treatment includes chemotherapy and supportive care.
      • Chronic myeloid leukemia (CML):
        • Characterized by an overproduction of mature myeloid cells, including neutrophils, basophils, and eosinophils.
        • Usually affects older animals.
        • Can be asymptomatic or cause signs like weight loss, lethargy, and splenomegaly.
        • Treatment options include chemotherapy, tyrosine kinase inhibitors, and supportive care.

    Bleeding Time Tests

    • Buccal Mucosa Bleeding Time (BMBT):
      • Performed on the inside of the upper lip.
      • Normal dogs and cats stop bleeding from the incision within 2 to 4 minutes.
      • Prolonged in those with inherited and acquired platelet dysfunction, von Willebrand disease, and DIC.
    • Toenail Bleeding Time Test:
      • Performed only if the animal is sedated or anesthetized.
      • The nail is cut at the cuticle, and blood is allowed to flow freely.
      • Normal dogs stop bleeding within 5 to 6 minutes.
      • Prolonged in significant coagulation factor deficiencies, vWD, platelet dysfunction, and DIC.

    Hematology

    • Hereditary Stomatocytosis is a disorder characterized by mild anemia with slight reticulocytosis, an autosomal recessive trait commonly found in Alaskan Malamutes, and associated with chondrodysplasia.

    • Babesiosis is a tick-borne disease that affects erythrocytes with clinical signs ranging from acute hemolytic crises to subclinical signs, and is associated with anemia.

      • Blood smear findings show large teardrop-shaped organisms, and smaller signet ring-shaped forms, suggestive of B.gibsoni.
      • Treatment includes imidocarb dipropionate.
    • Eccentrocytosis is a condition where red blood cells take on a dumbbell appearance with a distinctive central paleness, potentially due to onion and garlic ingestion in dogs.

    • Eosinophilic Leukemia is indicated by an elevated eosinophil count, with immature forms, possibly resembling hypereosinophilic conditions such as allergies or parasites.

      • Eosinophils may infiltrate organs like lymph nodes, liver, and spleen.
    • Basophilic Leukemia is rare, predominantly affecting dogs with mature and immature basophilia observed in blood or bone marrow, often correlated with thrombocytosis and anemia.

      • Must differentiate from mast cell leukemia.
    • Multiple Myeloma is defined as a plasma cell neoplasm, commonly seen in older dogs with clinical signs like anorexia, lethargy, polyuria, polydipsia.

    Coagulation Disorders

    • Activated Clotting Time is a test to evaluate the intrinsic clotting system, collected in a vacuum tube with siliceous earth.

    • Disseminated Intravascular Coagulation (DIC) is a life-threatening condition caused by overactivation of the coagulation system, leading to widespread microthrombi formation.

      • Clinical Signs: bleeding, fever, hepatosplenomegaly, anemia, and tachypnea.
      • Treatment: IV fluids, blood transfusion, heparin, prednisone, azathioprine, human immunoglobulin, and cyclosporine.
    • Immune Mediated Thrombocytopenia (IMT) is a suspected cause of thrombocytopenia with bleeding, most often in healthy appearing animals.

      • Clinical Signs: epistaxis, oral cavity bleeding, petechiae, ecchymoses, hematuria, melena, pale gums, splenomegaly, fever, and retinal hemorrhage.
      • Diagnosis: severe thrombocytopenia (<25,000/L).

    Splenic Disorders

    • Splenic Disorders can be influenced by the spleen's primary function, which includes filtration of peripheral blood, removal of aging red blood cells, and removal of inclusions, including Howell-Jolly bodies, Heinz bodies, and hemoparasites.
    • Spleen is the largest lymphoid organ with important immunological functions.

    Chronic Myeloproliferative Diseases

    • Chronic Granulocytic (Neutrophilic) Leukemia: Increased numbers of progranulocytes to metamyelocytes in blood and bone marrow.
    • Eosinophilic Leukemia: Rare, and involves measurements of vWF concentration and PK.
    • Megakaryoblastic (M7): Rare, may be associated with radiation in dogs.

    Coagulation

    • Coagulation Factor Deficiencies: Acquired deficiencies are common, and occur due to decreased liver function.
    • Three Subtypes of vWD:
      • Type 1: Mild to moderate, with low vWF concentration but normal vWF structure.
      • Type 2: Severe bleeding, with low vWF concentration and abnormal vWF structure.
      • Type 3: Severe bleeding, due to complete lack of vWF.
    • Disseminated Intravascular Coagulopathy (DIC): Caused by activation of the coagulation cascade, resulting in thrombi, decreased blood supply, and fibrinolytic pathways activation.
    • DIC is associated with: severe inflammation, sepsis, neoplasia, burn wounds, pancreatitis, and intravascular hemolysis.
    • Clinical Signs of DIC: Spontaneous hemorrhage, excessive bleeding after surgery or trauma.
    • Diagnosis of DIC: Through a combination of clinical signs, history, radiography, and lab findings.
    • Treatment for DIC: Transfusion therapy, supportive care for hemorrhage prevention, vitamin K therapy for vitamin K deficiency.

    Immune Disorders

    • Immune-Mediated Hemolytic Anemia (IMHA): Cause is unknown, and breeds like cocker spaniels, poodles, and old English sheepdogs have a higher incidence.
    • Clinical Signs of IMHA: Weakness, collapse, pale gums, discolored urine, fever, hepatosplenomegaly, tachycardia, and tachypnea.
    • Lab findings for IMHA: Anemia, reticulocytosis, spherocytosis, leukocytosis with left shift.
    • Complications of IMHA: DIC and thromboembolism.
    • Treatment of IMHA: IV fluids, blood transfusion (PCV below 15%), prophylactic heparin or aspirin, prednisone, azathioprine, human immunoglobulin, and cyclosporine.

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    Test your knowledge on various hematological conditions affecting cats, including lead toxicity, myelophthisis, and lysosomal storage diseases. This quiz also covers specific syndromes like abnormal granulation syndrome and neutrophilia. Understand the implications and diagnosis related to these conditions.

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