Rheumatology - Rheumatologic Emergencies

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Questions and Answers

Which of the following best describes the underlying mechanism of relapsing polychondritis?

  • A metabolic disorder causing cartilage calcification and inflammation.
  • A bacterial infection causing inflammation of cartilage.
  • A degenerative process due to chronic mechanical stress on joints.
  • An immune system disorder leading to episodic inflammation of hyaline cartilage. (correct)

A patient presents with unilateral ear inflammation, saddle nose deformity, and is suspected of having Relapsing Polychondritis, which of the following diagnostic findings would support this diagnosis?

  • Elevated Anti-dsDNA antibodies.
  • Presence of ANCA (Anti-Neutrophil Cytoplasmic Antibodies). (correct)
  • Positive Lyme antibodies.
  • Elevated levels of rheumatoid factor.

A patient with relapsing polychondritis presents with life-threatening symptoms. Which of the following clinical manifestations would be most concerning?

  • External ear inflammation.
  • Scleritis.
  • Non-erosive seronegative arthritis.
  • Inflammation and edema of the larynx and trachea. (correct)

Which of the following is the preferred initial treatment for relapsing polychondritis?

<p>Steroids. (B)</p> Signup and view all the answers

A patient with suspected relapsing polychondritis is not responding adequately to initial steroid treatment. Which of the following would be the most appropriate next step in management?

<p>Add a DMARD such as methotrexate. (B)</p> Signup and view all the answers

Which of the following rheumatologic causes of stridor involves inflammation affecting the larynx and trachea?

<p>Granulomatosis with polyangiitis (D)</p> Signup and view all the answers

Which of the following conditions is associated with diffuse alveolar hemorrhage and requires evaluation for pulmonary capillaritis?

<p>ANCA-associated vasculitis (D)</p> Signup and view all the answers

A patient presents with microscopic polyangiitis (MPA). Which of the following laboratory findings is most likely to be associated with this condition?

<p>p-ANCA (anti-MPO) (B)</p> Signup and view all the answers

A patient is diagnosed with Goodpasture's syndrome. Which of the following laboratory findings is characteristic of this disease?

<p>Anti-GBM Abs (D)</p> Signup and view all the answers

What is the significance of identifying the causative organism in septic arthritis, especially when considering treatment strategies?

<p>It helps determine the duration of IV antibiotics needed. (C)</p> Signup and view all the answers

A patient presents with a monoarticular joint swelling, fever, and restricted range of motion. After joint aspiration, the synovial fluid analysis is pending. Which of the following is the most appropriate next step in management?

<p>Start empirical antibiotic therapy immediately. (B)</p> Signup and view all the answers

Which of the following factors is NOT a predisposing condition for developing septic arthritis?

<p>History of osteoarthritis. (A)</p> Signup and view all the answers

What clinical feature distinguishes Catastrophic Antiphospholipid Syndrome (CAPS) from typical Antiphospholipid Syndrome (APS)?

<p>Rapid onset of multi-organ failure due to widespread thrombosis (B)</p> Signup and view all the answers

Which of the following is a classification criterion for Catastrophic Antiphospholipid Syndrome (CAPS)?

<p>Evidence of involvement of at least three organs, systems, and/or tissues. (C)</p> Signup and view all the answers

What is a key supportive measure in the initial management of Catastrophic Antiphospholipid Syndrome (CAPS)?

<p>Central venous access and arterial line placement (B)</p> Signup and view all the answers

Which of the following laboratory findings would suggest a diagnosis of Catastrophic Antiphospholipid Syndrome (CAPS)?

<p>Microangiopathic hemolytic anemia (MAHA) (A)</p> Signup and view all the answers

What is the MOST critical element in confirming a diagnosis of Catastrophic Antiphospholipid Syndrome (CAPS)?

<p>Histopathological confirmation of small vessel occlusion in at least one organ or tissue, along with clinical and laboratory evidence (A)</p> Signup and view all the answers

A patient with known antiphospholipid antibodies is being evaluated for possible Catastrophic Antiphospholipid Syndrome (CAPS). Which clinical manifestation would raise suspicion for CAPS?

<p>Acute kidney injury and altered mental status. (C)</p> Signup and view all the answers

A patient is diagnosed with Catastrophic Antiphospholipid Syndrome (CAPS). Besides anticoagulation and steroids, which additional medical treatment is often utilized in managing CAPS?

<p>Rituximab or pulse endoxan (D)</p> Signup and view all the answers

A patient presents with hemoptysis, hematuria, and dyspnea. Which diagnosis should be considered?

<p>ANCA-associated vasculitis. (D)</p> Signup and view all the answers

Which of the following clinical manifestations in relapsing polychondritis is most likely to necessitate immediate airway intervention?

<p>Inflammation and edema of the larynx and trachea (C)</p> Signup and view all the answers

In the management of relapsing polychondritis, what is the rationale for initiating treatment with steroids?

<p>Steroids rapidly reduce inflammation and suppress the autoimmune response. (C)</p> Signup and view all the answers

Which of the following is the most critical step in differentiating septic arthritis from inflammatory arthritis in a patient presenting with monoarticular joint pain, swelling, and effusion?

<p>Conducting joint aspiration for synovial fluid analysis and culture (C)</p> Signup and view all the answers

Which of the following scenarios would most strongly suggest the need for surgical intervention in a patient diagnosed with septic arthritis?

<p>A patient with persistent symptoms after 5-7 days of appropriate intravenous antibiotic therapy and evidence of loculated fluid (B)</p> Signup and view all the answers

In the context of septic arthritis, what is the primary rationale for performing Gram staining and culture of the synovial fluid?

<p>To identify the causative organism and guide antibiotic selection (B)</p> Signup and view all the answers

What is the underlying mechanism that distinguishes Catastrophic Antiphospholipid Syndrome (CAPS) from typical Antiphospholipid Syndrome (APS)?

<p>Widespread microvascular thrombosis and multiorgan failure (B)</p> Signup and view all the answers

Which of the following is the most critical laboratory finding that supports a diagnosis of Catastrophic Antiphospholipid Syndrome (CAPS)?

<p>Thrombocytopenia, microangiopathic hemolytic anemia (MAHA), and positive antiphospholipid antibodies (C)</p> Signup and view all the answers

A patient with known antiphospholipid antibodies develops acute respiratory distress syndrome (ARDS), renal failure, and altered mental status. Which of the following diagnostic steps is most crucial in evaluating for possible Catastrophic Antiphospholipid Syndrome (CAPS)?

<p>Histopathological examination of affected organs to confirm small vessel thrombosis (D)</p> Signup and view all the answers

In managing Catastrophic Antiphospholipid Syndrome (CAPS), which of the following treatments targets the underlying pathophysiology of the disease most directly?

<p>Intravenous immunoglobulin (IVIG) or plasma exchange (C)</p> Signup and view all the answers

Which of the following clinical scenarios would raise the strongest suspicion for diffuse alveolar hemorrhage (DAH) secondary to ANCA-associated vasculitis?

<p>A patient with hemoptysis, dyspnea and new onset sinusitis, positive c-ANCA, and a history of upper respiratory infections (C)</p> Signup and view all the answers

Which of the following best explains the episodic nature of inflammation in relapsing polychondritis?

<p>Intermittent immune system activation triggered by environmental factors or infections. (D)</p> Signup and view all the answers

A 50-year-old male presents with ear pain, nasal chondritis, and arthritis. Which serological test, if positive, would be most indicative of relapsing polychondritis despite ANCA's limited role?

<p>Anti-collagen type II antibodies (C)</p> Signup and view all the answers

A patient with relapsing polychondritis develops aortic regurgitation. What pathophysiological mechanism most likely contributes to this cardiac valvular dysfunction?

<p>Inflammation-induced destruction of the elastic tissue in the aortic root. (A)</p> Signup and view all the answers

A patient presents with suspected septic arthritis of the knee. After arthrocentesis, Gram stain is negative, but synovial fluid shows 75,000 leukocytes/(\mu)L with 90% neutrophils. Which step is most crucial?

<p>Starting antibiotics, empirically covering likely organisms, and closely monitoring clinical response. (A)</p> Signup and view all the answers

A 60-year-old patient with a prosthetic knee joint develops septic arthritis due to Staphylococcus aureus. Despite appropriate IV antibiotics, symptoms persist. Which factor most strongly indicates need for surgical debridement?

<p>Detection of biofilm formation on the prosthetic material. (D)</p> Signup and view all the answers

In a patient suspected of Catastrophic Antiphospholipid Syndrome (CAPS), which clinical scenario warrants the most urgent and aggressive therapeutic intervention?

<p>Progressive renal failure with microangiopathic hemolytic anemia and respiratory distress (B)</p> Signup and view all the answers

Which laboratory finding, in addition to positive antiphospholipid antibodies, would most strongly suggest evolution of APLS to devastating CAPS?

<p>Microangiopathic Hemolytic Anemia (MAHA) (D)</p> Signup and view all the answers

A patient with known APS is admitted due to suspected CAPS. Besides anticoagulation what additional treatment is most likely to alter disease trajectory?

<p>Plasma Exchange (A)</p> Signup and view all the answers

A patient presents with hemoptysis, hematuria, and dyspnea, suspected of pulmonary-renal syndrome. What lab result points towards microscopic polyangiitis?

<p>Positive P-ANCA (B)</p> Signup and view all the answers

A patient with suspected diffuse alveolar hemorrhage (DAH) needs prompt evaluation. Which test differentiates Goodpasture's Syndrome and ANCA-associated vasculitis?

<p>Anti-GBM antibodies (C)</p> Signup and view all the answers

Flashcards

Relapsing Polychondritis

An immune system disorder marked by episodic inflammation of hyaline cartilage.

Relapsing Polychondritis Ear Involvement

Unilateral or bilateral inflammation of the external ear.

Relapsing Polychondritis Larynx & Trachea

Inflammation and edema in the larynx and trachea.

Relapsing Polychondritis Treatment

Steroids and DMARDs (like Methotrexate).

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Catastrophic Antiphospholipid Syndrome (CAPS)

A rare, life-threatening condition; rapid onset with severe DIC, microvascular and large-vessel thrombosis, leading to multi-organ failure.

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CAPS Classification Criteria

Involvement of ≥ 3 organs/systems, simultaneous manifestations, small vessel occlusion, antiphospholipid antibodies.

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CAPS Kidney Involvement

Acute kidney injury, malignant hypertension.

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CAPS Lung Involvement

ARDS, pneumonia, pulmonary embolism.

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CAPS CNS Involvement

Encephalopathy, seizures, large vessel infarction.

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CAPS Heart Involvement

Heart failure, myocardial infarction, microvascular occlusions, Libman-Sacks endocarditis.

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CAPS Skin Manifestations

Livedo reticularis, purpura, splinter hemorrhages.

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CAPS GIT Involvement

Small/large bowel infarction, thrombotic pancreatitis, Budd-Chiari syndrome.

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CAPS Routine Lab Findings

MAHA, schistocytes, thrombocytopenia.

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CAPS aPTT Result

Prolonged

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CAPS Urinalysis Result

Proteinuria

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CAPS Antiphospholipid Antibodies

Lupus anticoagulant, anticardiolipin, anti-β2 glycoprotein antibodies.

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CAPS Medical Treatment

Steroids and immunosuppressants (endoxan or rituximab).

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Septic Arthritis

Septic Arthritis is an Orthopedic Emergency

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Relapsing Polychondritis Nose

Pain, redness, and swelling of the nasal bridge, potentially leading to structural deformity.

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Relapsing Polychondritis Joints

Non-erosive arthritis that tests negative for rheumatoid factor, affecting various joints.

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Relapsing Polychondritis Eyes

Inflammation of the sclera, the white part of the eye.

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Relapsing Polychondritis Skin

A condition characterized by inflammation of the subcutaneous fat layer.

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Relapsing Polychondritis Heart

A potential cardiac complication where the aortic valve doesn't close properly.

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Vasculitic Syndromes

A group of disorders characterized by inflammation of blood vessels.

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Pulmonary/Renal Syndrome

Simultaneous lung hemorrhage and kidney disease.

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Diffuse Alveolar Hemorrhage

Alveolar damage from inflammation causes bleeding in the lungs.

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Renal Disease

Occurs when the kidneys are affected by inflammation and damage.

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Nephritis

Kidney inflammation involving the glomeruli

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Classical Triad (Septic Arthritis)

Fever, joint pain, and restricted motion; seen in septic arthritis.

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Septic Arthritis Joints

Monoarticular or oligoarticular, especially in the knees, hips, wrists, and shoulders.

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Clinical Presentation of ARDS

Common presenting symptoms include: cough, dyspnea, fever, hemoptysis and hematuria.

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Study Notes

Relapsing Polychondritis

  • No new information in the text

Rheumatologic Causes of Stridor

  • No new information in the text

Pulmonary/Renal "Vasculitic" Syndromes

  • In the table, details of renal involvement for each of the diseases listed, all cause nephritis

Renal Disease

  • No new information in the text

Clinical Picture:

  • No new information in the text

Diagnosis:

  • No new information in the text

Treatment:

  • No new information in the text

Causes of ARDS in Rheumatic Diseases:

  • No new information in the text

Septic Arthritis

  • No new information in the text

Causative Organisms

  • No new information in the text

Predisposing Factors

  • No new information in the text

Clinical Picture

  • No new information in the text

Diagnosis

  • No new information in the text

Treatment

  • No new information in the text

Catastrophic Antiphospholipid Syndrome (CAPS) Definition

  • No new information in the text

Classification Criteria of CAPS

  • No new information in the text

Clinical Picture:

  • No new information in the text

Diagnosis

  • No new information in the text

Treatment

  • No new information in the text

Causes of Multiorgan Thrombosis:

  • No new information in the text

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