Pathology CPC: Flank Pain & Haematuria

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Questions and Answers

A 65-year-old male presents with left flank pain for 4 months and a palpable left-sided abdominal mass. What is the MOST likely broad differential diagnosis category?

  • Musculoskeletal issue
  • Vascular abnormality
  • Renal or retroperitoneal mass (correct)
  • Gastrointestinal malignancy

A 65-year-old male presents with left flank pain and is found to have a left renal mass. Which laboratory finding would be LEAST specific to this presentation?

  • Hematuria on urinalysis
  • Elevated hemoglobin
  • Elevated CRP
  • Normal white cell count (correct)

A 65-year-old male with left flank pain has a raised CRP. Which of the following conditions is LEAST likely to be associated with an elevated CRP?

  • Trauma
  • Chronic kidney disease (correct)
  • Infection
  • Autoimmune disease

Following an initial ultrasound that reveals a mass in the left kidney, what is the MOST appropriate next-step investigation to further characterize the mass?

<p>CT scan of the abdomen (D)</p> Signup and view all the answers

A CT scan reveals a hypodense mass in the left kidney. In which scenario would a biopsy be MOST necessary to guide management?

<p>The patient has a solitary kidney. (D)</p> Signup and view all the answers

In a 65-year-old patient with a newly discovered renal mass, which of the following histological types of renal tumor is MOST likely?

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

Which of the following is the MOST common subtype of renal cell carcinoma?

<p>Clear cell (B)</p> Signup and view all the answers

A patient is diagnosed with clear cell renal cell carcinoma. Which genetic syndrome is MOST strongly associated with an increased risk of developing this cancer?

<p>Von Hippel-Lindau syndrome (A)</p> Signup and view all the answers

What is the standard primary treatment for localized renal parenchymal cell carcinoma?

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

From which cells do most renal parenchymal cell carcinomas originate?

<p>Renal tubular cells (D)</p> Signup and view all the answers

Which of the following factors is MOST important in determining the prognosis of renal cell carcinoma?

<p>Stage and grade of the tumor (D)</p> Signup and view all the answers

A patient with renal cell carcinoma develops polycythemia. What paraneoplastic effect is MOST likely responsible for this?

<p>Increased erythropoietin production (A)</p> Signup and view all the answers

A 56-year-old male presents with hematuria. What is the FIRST step in determining the differential diagnosis?

<p>Determine if it is glomerular or non-glomerular (B)</p> Signup and view all the answers

A 56-year-old male presents with hematuria on two occasions. Which of the following is LEAST likely to be a renal cause of his hematuria?

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

What is the MOST common cause of bladder cancer?

<p>Urothelial carcinoma (B)</p> Signup and view all the answers

A patient is diagnosed with bladder cancer. Which of the following is MOST closely associated with increasing the risk of squamous cell carcinoma of the bladder?

<p>Schistosomiasis (C)</p> Signup and view all the answers

A patient presents with hematuria, urgency, and dysuria. Which of the following complications would be LEAST likely related to these symptoms in the context of bladder carcinoma?

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

A patient's bladder carcinoma is staged using the TNM system. What does the 'T' in this classification MOST directly refer to?

<p>Level of invasion through the bladder wall (B)</p> Signup and view all the answers

What is the MOST likely treatment for early-stage bladder carcinoma?

<p>Excision (D)</p> Signup and view all the answers

Which of the following occupations is MOST likely to increase the risk of bladder cancer?

<p>Textile worker using aniline dyes (A)</p> Signup and view all the answers

A 43-year-old male presents with severe, colicky left loin pain of sudden onset. Which of the following conditions should be considered FIRST in the differential diagnosis?

<p>Renal colic (A)</p> Signup and view all the answers

A 43-year-old male presents with severe, colicky pain. If the patient were female, which additional differential diagnosis should be considered?

<p>Ectopic pregnancy (B)</p> Signup and view all the answers

A 43-year-old male presents with sudden onset colicky abdominal pain. What is the MOST appropriate initial test to distinguish between renal colic and other causes of abdominal pain?

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

Which of the following is the MOST common type of urinary stone?

<p>Calcium oxalate (C)</p> Signup and view all the answers

Which of the following conditions is MOST likely to predispose a patient to the formation of struvite stones?

<p>Chronic UTI with urease-producing bacteria (D)</p> Signup and view all the answers

A patient with a history of recurrent calcium oxalate stones is being evaluated. Which of the following is the MOST common underlying metabolic abnormality associated with the formation of these stones?

<p>Hypercalciuria with normal serum calcium (A)</p> Signup and view all the answers

Which type of urinary stone is LEAST likely to be visible on a plain abdominal X-ray?

<p>Uric acid (C)</p> Signup and view all the answers

A patient is diagnosed with a ureteral stone causing obstruction. What is one of the MOST concerning potential complications?

<p>Pyelonephritis (D)</p> Signup and view all the answers

What is the MOST concerning sequela from a stricture of the ureter?

<p>Distal renal atrophy (A)</p> Signup and view all the answers

What investigation would be MOST helpful in guiding the diagnosis of the cause of hematuria?

<p>IVP (D)</p> Signup and view all the answers

A patient presents with hematuria. A cystoscopy reveals a papillary tumor in the bladder. What should be done next?

<p>Biopsy of bladder lesion (B)</p> Signup and view all the answers

Which form of bladder tumor is MOST common?

<p>Malignant (D)</p> Signup and view all the answers

Which is NOT classified as a type of bladder carcinoma?

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

Which is NOT a common symptom of bladder carcinomas?

<p>Weight gain (D)</p> Signup and view all the answers

What is a key factor in determining the prognosis of bladder carcinomas?

<p>Type, grade, and stage (D)</p> Signup and view all the answers

If a patient presents with early bladder carcinomas, which of these is the MOST likely treatment?

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

Which substance has NOT been linked to the cause of bladder cancer?

<p>Protein shakes (C)</p> Signup and view all the answers

If a patient is experiencing haematuria, what body part should be checked?

<p>All of the above (E)</p> Signup and view all the answers

A 43 year old male patient presents at A&E with flank pain.

<p>All of the above (E)</p> Signup and view all the answers

Which of the following is NOT a known complication of kidney stones?

<p>Increased haemoglobin (D)</p> Signup and view all the answers

What is the key learning outcome from this lecture?

<p>All of the above (E)</p> Signup and view all the answers

Which of the following is the MOST likely diagnosis for a 65-year-old male presenting with left flank pain and a left-sided abdominal mass, considering the higher incidence in this age group?

<p>Renal Tumor (A)</p> Signup and view all the answers

A 65-year-old male with a left renal mass exhibits a haemoglobin level of 17 g/dL. What is the MOST likely explanation for this laboratory finding in the context of renal cell carcinoma?

<p>Paraneoplastic production of erythropoietin (D)</p> Signup and view all the answers

Given a raised CRP of 40 in a 65-year-old male with a renal mass, which of the following conditions would be LEAST likely to contribute to this elevated inflammatory marker?

<p>Recent myocardial infarction (A)</p> Signup and view all the answers

Following initial assessment with ultrasound, which reveals a mass in the left kidney, what is the MOST appropriate next-step investigation to further characterize the mass and assess for potential metastasis?

<p>CT scan with intravenous contrast (B)</p> Signup and view all the answers

A CT scan reveals a hypodense mass in the left kidney of a 65-year-old patient. In which of the following scenarios is a biopsy MOST crucial in guiding the immediate management strategy?

<p>The patient is a poor surgical candidate due to multiple comorbidities. (C)</p> Signup and view all the answers

What is the MOST likely histological type of renal tumor found in a 65-year-old patient with a newly discovered renal mass?

<p>Clear Cell Renal Cell Carcinoma (C)</p> Signup and view all the answers

A patient with renal cell carcinoma develops hypercalcemia. What paraneoplastic effect is MOST likely responsible for this?

<p>Secretion of parathyroid hormone-related protein (PTHrP) (B)</p> Signup and view all the answers

A 56-year-old male presents with macroscopic hematuria. After initial assessment, investigations are needed to determine the cause. What is the MOST appropriate sequence of investigations?

<p>Urinalysis → CT urogram → Cystoscopy (D)</p> Signup and view all the answers

A 56-year-old male reports painless hematuria on two separate occasions. Considering the potential causes, which of the following would be LEAST likely and warrant consideration of rarer etiologies?

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

Which etiological factor plays the LEAST significant role in the development of bladder cancer?

<p>Diet high in saturated fats (C)</p> Signup and view all the answers

A patient presents with hematuria, urgency, and dysuria. Which of the following signs or symptoms would suggest a more advanced stage of bladder carcinoma?

<p>Unilateral flank pain (B)</p> Signup and view all the answers

If a patient's bladder carcinoma is staged as T3 according to the TNM classification, this indicates that the tumor has invaded which of the following?

<p>Beyond the muscularis propria into the perivesical fat (B)</p> Signup and view all the answers

A patient is diagnosed with early-stage, non-muscle invasive bladder cancer. Considering the management options, which of the following is MOST likely to be part of their initial treatment?

<p>Transurethral Resection of Bladder Tumor (TURBT) (B)</p> Signup and view all the answers

Which of the following substances has NOT been definitively linked to an increased risk of bladder cancer development?

<p>Artificial Sweeteners (B)</p> Signup and view all the answers

A 43-year-old male presents with severe, colicky left loin pain. After initial assessment, what underlying factor should be considered INITIALLY when determining the possible causes of his symptoms?

<p>Likelihood of Renal Colic (B)</p> Signup and view all the answers

A 43-year-old male presents with severe, colicky pain. If the patient were female, which additional differential diagnosis warrants consideration when evaluating the cause of her symptoms?

<p>Ovarian Cyst (A)</p> Signup and view all the answers

A 43-year-old male presents with sudden onset colicky abdominal pain. Which initial diagnostic test is MOST effective in differentiating between renal colic and other potential intra-abdominal pathologies?

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

Which factor contributes LEAST to the development of calcium oxalate stones?

<p>Alkaline Urine pH (C)</p> Signup and view all the answers

Which of the following mechanisms is MOST directly associated with the formation of struvite stones?

<p>Urease-producing bacteria (D)</p> Signup and view all the answers

If the patient has a history of recurrent calcium oxalate stones, what is the MOST effective long term management strategy?

<p>Dietary modification and increased fluid intake (B)</p> Signup and view all the answers

Which of the following statements accurately describes uric acid stones?

<p>They are associated with conditions causing hyperuricemia (D)</p> Signup and view all the answers

A patient is diagnosed with a ureteral stone causing significant obstruction. Beyond pain management, one of the MOST immediate concerns associated with this condition is what?

<p>Acute kidney injury (D)</p> Signup and view all the answers

Which of the following is the MOST concerning sequela resulting from a stricture of the ureter?

<p>Hydronephrosis and renal damage (B)</p> Signup and view all the answers

Following the finding of a papillary tumor during the cystoscopy of a patient presenting with hematuria, which is the MOST critical next step in management?

<p>Conducting a biopsy of the tumor (A)</p> Signup and view all the answers

When considering the histological types of bladder carcinoma, which is the MOST prevalent?

<p>Urothelial Carcinoma (A)</p> Signup and view all the answers

Which of the following symptoms can you directly infer from the complication Hydronephrosis?

<p>Ureteric Outflow Obstruction (B)</p> Signup and view all the answers

Which of the following describes how the prognosis of bladder carcinomas is MOST accurately determined?

<p>Type, Grade and Stage (A)</p> Signup and view all the answers

Given a patient with early bladder carcinomas, select what the MOST likely treatment option is?

<p>Excision of Ca (if early) (D)</p> Signup and view all the answers

Which of the following factors has been linked to bladder cancer?

<p>Aniline Dye (D)</p> Signup and view all the answers

In a 65-year-old male presenting with flank pain and a renal mass, what cellular process is MOST likely to be upregulated, contributing to the elevated haemoglobin level?

<p>Increased erythropoietin secretion by the tumor cells. (A)</p> Signup and view all the answers

A 65-year-old male with a renal mass presents with an elevated CRP. If amyloidosis was suspected as an underlying cause, what additional clinical finding would MOST strongly support this suspicion?

<p>Nephrotic syndrome with proteinuria. (B)</p> Signup and view all the answers

Following an ultrasound revealing a renal mass, which imaging modality offers the MOST detailed assessment of vascular involvement and is therefore crucial for surgical planning?

<p>CT angiography. (A)</p> Signup and view all the answers

In a patient with a hypodense renal mass found on CT scan, a biopsy is MOST critical for guiding management in which scenario?

<p>The mass is less than 4 cm, and the patient is elderly with multiple comorbidities. (D)</p> Signup and view all the answers

A 65-year-old patient is diagnosed with clear cell renal cell carcinoma. Which molecular marker is MOST likely to be dysregulated in this patient's tumor cells?

<p>VHL (D)</p> Signup and view all the answers

A patient with renal cell carcinoma develops hypercalcemia. Which mechanism involving PTHrP (parathyroid hormone-related protein) BEST explains this paraneoplastic effect?

<p>Ectopic secretion of PTHrP leading to increased bone resorption. (A)</p> Signup and view all the answers

A 56-year-old male presents with hematuria. After initial assessment, what is the BEST investigative approach to differentiate between glomerular and non-glomerular bleeding?

<p>Urine microscopy with assessment for red blood cell morphology and casts. (D)</p> Signup and view all the answers

A 56-year-old male reports painless hematuria on two separate occasions. Which of the following rare etiologies is MOST likely to be considered only after excluding more common causes?

<p>Nutcracker syndrome. (A)</p> Signup and view all the answers

Which environmental exposure is LEAST directly implicated in the development of bladder cancer?

<p>Chronic arsenic exposure through contaminated water. (D)</p> Signup and view all the answers

A patient presents with hematuria, urgency, and dysuria. Which symptom suggests a more advanced stage of bladder carcinoma?

<p>Suprapubic pain and palpable mass. (A)</p> Signup and view all the answers

If a patient's bladder carcinoma is staged as T3 according to the TNM classification, which anatomical structure has the tumor MOST likely invaded?

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

A patient is diagnosed with early-stage, non-muscle invasive bladder cancer. What therapeutic strategy is MOST likely to be employed FIRST?

<p>Transurethral resection of the bladder tumor (TURBT) followed by intravesical therapy. (D)</p> Signup and view all the answers

Which factor has LEAST evidence linking it to the development of bladder cancer?

<p>Artificial Sweeteners (D)</p> Signup and view all the answers

A 43-year-old male presents with severe, colicky left loin pain. What underlying pathology should be suspected FIRST?

<p>Renal colic (C)</p> Signup and view all the answers

A 43-year-old male presents with severe, colicky pain. If the patient were female, which additional differential diagnosis requires consideration?

<p>Ectopic pregnancy. (C)</p> Signup and view all the answers

A 43-year-old male presents with sudden onset colicky abdominal pain. Which initial diagnostic test differentiates renal colic from other potential intra-abdominal pathologies?

<p>Urinalysis (C)</p> Signup and view all the answers

Which factor is LEAST likely to contribute directly to the formation of calcium oxalate stones?

<p>High dietary intake of sodium. (C)</p> Signup and view all the answers

What mechanism is MOST directly associated with the formation of struvite stones?

<p>Urease-producing bacteria causing alkaline urine. (C)</p> Signup and view all the answers

If a patient has a history of recurrent calcium oxalate stones, what constitutes the MOST effective long-term management strategy to prevent stone formation?

<p>Thiazide diuretics and increased fluid intake. (C)</p> Signup and view all the answers

Which statement accurately describes uric acid stones?

<p>They are associated with diets high in purines (A)</p> Signup and view all the answers

A patient is diagnosed with a ureteral stone causing significant obstruction. Beyond pain management, what is the MOST immediate concern to address?

<p>Preserving renal function by relieving obstruction. (B)</p> Signup and view all the answers

What is the MOST concerning long-term sequela of a stricture of the ureter?

<p>Chronic kidney disease due to hydronephrosis. (A)</p> Signup and view all the answers

Following a cystoscopy revealing a papillary tumor in the bladder of a patient with hematuria, what is the MOST critical immediate next step?

<p>Resection of the tumor and histological assessment. (C)</p> Signup and view all the answers

Among the histological types of bladder carcinoma, which is the MOST commonly encountered?

<p>Urothelial carcinoma (C)</p> Signup and view all the answers

What physiological disturbance can be DIRECTLY inferred from the complication of hydronephrosis?

<p>Decreased renal perfusion secondary to increased intrarenal pressure. (D)</p> Signup and view all the answers

What criteria BEST determine the prognosis of bladder carcinomas?

<p>Tumor type, grade, and stage. (C)</p> Signup and view all the answers

Considering a patient with early bladder carcinoma, what is the MOST likely first-line treatment option?

<p>Transurethral resection and intravesical therapy. (B)</p> Signup and view all the answers

What factor has an ESTABLISHED link to bladder cancer?

<p>Genetic mutations related to metabolism of toxins (A)</p> Signup and view all the answers

Which of the following clinical findings would MOST suggest that a patient's flank pain is due to a cause other than renal colic?

<p>Fever, chills, and leukocytosis (D)</p> Signup and view all the answers

Following a renal biopsy, which finding is MOST indicative of acute tubular necrosis (ATN) as the cause of acute kidney injury?

<p>Patchy necrosis of tubular cells with casts. (A)</p> Signup and view all the answers

A patient with chronic kidney disease (CKD) secondary to diabetic nephropathy is MOST at risk for developing which electrolyte abnormality?

<p>Hyperphosphatemia. (C)</p> Signup and view all the answers

Which medication class is MOST likely to cause acute interstitial nephritis (AIN)?

<p>Nonsteroidal anti-inflammatory drugs (NSAIDs). (A)</p> Signup and view all the answers

A patient with end-stage renal disease (ESRD) is MOST likely to exhibit which hematological abnormality?

<p>Anemia. (C)</p> Signup and view all the answers

What are the most common symptoms indicated in the slides?

<p>Flank pain and haematuria (B)</p> Signup and view all the answers

What is the MOST likely diagnosis to be considered for a 43-year old male with severe colicky left loin pain?

<p>Renal Colic (C)</p> Signup and view all the answers

Which of the following best characterizes renal cell carcinoma?

<p>Most likely dx in older age groups (A)</p> Signup and view all the answers

What type of investigation is usually conducted when dealing with haematuria?

<p>Diagnostic and organ specific (C)</p> Signup and view all the answers

Based on what you have been thought in this lecture, which option is correct?

<p>Malignant urothelial is more likely than benign (A)</p> Signup and view all the answers

In a 65-year-old male presenting with left flank pain and a palpable abdominal mass, if imaging reveals multiple, bilateral renal masses, which genetic condition should be HIGHLY considered?

<p>Von Hippel-Lindau Syndrome (A)</p> Signup and view all the answers

A 65-year-old male with a left renal mass and elevated haemoglobin is suspected of having paraneoplastic erythrocytosis. Which factor produced by the tumour cells is MOST likely driving this erythrocytosis?

<p>Erythropoietin (EPO) (A)</p> Signup and view all the answers

In a 65-year-old male presenting with a left renal mass and elevated CRP, if the CRP remains persistently elevated despite treatment of a presumed infection, which of the following conditions would raise suspicion for a paraneoplastic syndrome?

<p>Reactive Amyloidosis (C)</p> Signup and view all the answers

Following ultrasound detection of a renal mass, if a CT scan with contrast is contraindicated, what is the MOST appropriate alternative imaging modality to stage the renal mass and assess for metastasis?

<p>MRI with Gadolinium Contrast (A)</p> Signup and view all the answers

In a patient with a hypodense renal mass on CT scan, which finding on imaging would MOST strongly suggest the need for biopsy to differentiate between oncocytoma and clear cell renal cell carcinoma?

<p>Central Scarring Pattern with spoke-wheel enhancement (D)</p> Signup and view all the answers

A patient is diagnosed with clear cell renal cell carcinoma. Which of the following molecular mechanisms is MOST commonly implicated in the pathogenesis of this cancer?

<p>Inactivation of the VHL tumor suppressor gene (B)</p> Signup and view all the answers

A patient with renal cell carcinoma develops hypercalcemia. Which of the following mechanisms involving PTHrP (parathyroid hormone-related protein) BEST explains this paraneoplastic effect?

<p>The tumor secretes PTHrP, which acts on bone to increase calcium release and kidney to increase calcium reabsorption. (B)</p> Signup and view all the answers

A 56-year-old male presents with hematuria and is subsequently diagnosed with bladder cancer. Which of the following environmental exposures is LEAST directly implicated in the development of bladder cancer?

<p>Chronic exposure to ultraviolet (UV) radiation (A)</p> Signup and view all the answers

A 56-year-old male presents with hematuria and is diagnosed with bladder carcinoma. Which symptom suggests a higher likelihood of muscle-invasive disease?

<p>Palpable abdominal mass detected on physical examination (D)</p> Signup and view all the answers

In a patient with bladder carcinoma staged as T3 according to the TNM classification, which anatomical structure has the tumor MOST likely invaded?

<p>Perivesical fat (C)</p> Signup and view all the answers

For a patient diagnosed with early-stage, non-muscle invasive bladder cancer, which therapeutic strategy is MOST likely to be employed FIRST?

<p>Transurethral Resection of Bladder Tumor (TURBT) (A)</p> Signup and view all the answers

What physiological disturbance can you DIRECTLY infer from the complication of hydronephrosis?

<p>Increased pressure in the renal pelvis and calyces (D)</p> Signup and view all the answers

Flashcards

Flank Pain

Pain in the side of the body between the ribs and the hip.

Haematuria

The presence of blood in the urine.

Causes of flank pain

Renal, Colonic, Adrenal and Ureteric masses

Types of Renal Masses

Benign, Malignant and Abscess.

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Renal Mass

A mass in the kidney.

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Differential Diagnosis of Flank Pain

Renal Mass, Colonic Mass, Adrenal Mass, Ureteric Mass, Splenomegaly.

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Most likely renal tumour

Renal cell carcinoma.

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Aetiology of RCC

Genetic factors, Polycystic Disease, Cystic disease, Smoking and Translocations.

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Treatment of Renal Cell Carcinoma

Nephrectomy +- Chemotherapy

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Cells of origin

Renal Tubule.

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Urothelial Carcinoma

Urothelial carcinoma is a more recent name for transitional cell Ca.

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Renal Carcinoma prognosis

Kidney confined 70% 5 year survival, Renal Vein involved 15% 5 years

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Paraneoplastic effects

Polycythaemia, Hypercalcemia and Hypertension.

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Differentials of Haematuria

Renal, Post renal and General/systemic.

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Renal causes of Haematuria

Tumours, Glomerulonephritis, Calculi, Trauma and pyelonephritis

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Bladder causes of haematuria

Tumour, stones and infections

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Transitional cell carcinoma

Urothelial carcinoma.

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Investigation of haematuria

Urinalysis, Ultrasound of kidney, Cystoscopy and IVP (Intravenous pyelogram).

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PC of bladder carcinomas

Primary carcinoma, Haematuria, dysuria and hydronephrosis

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Management of Urothelial bladder

Excision of Ca, Radical cystectomy for muscle invasive carcinoma and Carcinoma in Situ - BCG.

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Prognosis of bladder carcinoma

Type, grade and stage.

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Aetiology of Bladder Cancer

Smoking, Aniline Dye, Stones, Chronic inflammation and Schistosomiasis.

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Causes of haematuria

Many causes, Kidney, Bladder, Ureter or Urethra.

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To distinguish between.

Urinalysis, a CT scan or a colonoscopy.

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Types of Urinary Stones

Calcium Oxalate 80%, Triple (Staghorn, MG, Ammonium, 15% Phosphate), Uric Acid, Cystinuria/oxalosis

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Triple Stones

With UTI's especially Proteus- Why? Proteus breaks down urea → Alkaline urine → precipitation of salts.

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What causes hypercalcaemia?

Defect in tubular re-absorption of calcium – commonest, i.e. hypercalciuria with normal serum calcium.

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Uncommon causes/reasons for renal colic

Tumour - causing obstruction.

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Another uncommon cause for renal colic

Blood clot in ureter.

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Common implications

Hydro ureter, Hydronephrosis, Pyelonephritis What is the cause of this?

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Raised CRP

An elevation in C-reactive protein levels in the blood.

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Renal Mass on Ultrasound

A mass found in the kidney, discovered via ultrasound, measuring 8cm.

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Kidney Tumour

Benign, malignant or primary tumour.

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Further investigation

CT/Angiography

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Hypodense Mass

A hypodense area, a mass that appears darker compared to the surrounding tissue.

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Usually Bx

Features on CT

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Carcinoma

Kidney tubules or renal pelvis.

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Types of Renal Parenchyma Carcinoma

Clear cell carcinoma, Papillary carcinoma, Collecting duct, Chromosomal associated and Chromophobe carcinoma.

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Renal Colic

A sudden, severe pain typically originating in the flank and radiating to the groin, caused by a kidney stone.

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Differentials

Renal Colic, GIT obstruction, ? Gallstone colic.

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Routinely

Urinalysis, check for blood.

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Most common urinary stone

Calcium Oxalate 80%.

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Causes of urinary stones

Increased PTH; Defect in tubular re-absorption of calcium.

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Study Notes

  • The Turning Point ID for this presentation is REGUBCPC2

Pathology CPC

  • Includes flank pain and haematuria

Case A - Male 65

  • The patient presented with left flank pain for 4 months
  • There is no radiation from the pain
  • They report no specific issues or concerns (S/R Nil)
  • The patient was previously well
  • On examination of the abdomen, a left-sided abdominal mass was found

Differentials for Flank Pain

  • Renal Mass: Could be benign, malignant, or an abscess
  • Colonic Mass
  • Adrenal Mass
  • Ureteric Mass
  • Splenomegaly

Lab Investigations

  • Haemoglobin (Hb) level is 17 g/dL
  • CRP level is 40
  • White Cell Count (WCC) is normal

Further Investigations

  • Classification of investigations: Laboratory and diagnostic imaging; organ and site specific investigations
  • Ultrasound of the abdomen is indicated
  • A CT scan of the abdomen may be necessary

Ultrasound Results

  • A mass was located on the left kidney, measuring 8cm
  • The mass displays iso- to hypoechoic characteristics

Differential Diagnosis for Kidney Mass

  • Tumour, which can be benign or malignant:

    • Primary: Carcinoma, Sarcoma, Lymphoma
    • Secondary: Carcinoma, Sarcoma, Melanoma, and Other
  • Abscess

  • Renal tumour is the most likely diagnosis in this age group

  • Additional investigations include CT and angiography

CT Scan Results

  • Reveals a hypodense mass

  • Biopsies are usually not necessary as CT scan features are pathognomonic

  • A biopsy can be done if the patient has a solitary kidney

  • A biopsy can be done if a patient is suitable for partial nephrectomy

Differentials for Renal Mass

  • Renal mass:

    • Carcinoma: of kidney tubules or urothelium in renal pelvis
    • Lymphoma: B cell or T cell
    • Sarcoma
    • Metastasis
    • Benign Tumours: Angiomyolipomas associated with Tuberous Sclerosis, Oncocytoma, Adenoma
  • Renal tumour is the most likely diagnosis for persons in this age group

Types of Renal Parenchyma Carcinoma

  • Clear cell carcinoma
  • Papillary carcinoma
  • Collecting duct carcinoma
  • Chromosomal associated carcinoma
  • Chromophobe carcinoma

Aetiology of Renal Cell Carcinoma

  • Genetic factors: Von Hippel Lindau Syndrome and chromosomal translocations
  • Polycystic disease
  • Cystic disease related to dialysis
  • Smoking
  • Numerous other translocations have recently been identified

Treatment of Renal Parenchyma Cell Carcinoma

  • Nephrectomy is usually performed

  • Chemotherapy may be used

  • The cell of origin for renal parenchymal cell carcinoma is the renal tubule

  • Urothelial Carcinoma is another type of carcinoma within the kidney which arises from the renal pelvis

Prognosis of Renal Cell Carcinoma

  • Factors determining prognosis are stage, grade, and type
  • If the kidney is confined, the 5-year survival rate is 70%
  • If the renal vein is involved, the 5-year survival rate is 15%
  • Paraneoplastic effects are sometimes seen in renal carcinoma: Polycythaemia, hypercalcaemia, and hypertension

Case B - Male 56

  • Overview of Haematuria
  • PC: Haematuria on 2 occasions
  • Otherwise well

Differentials for Haematuria

  • Renal
  • Post-renal
  • General/systemic

Renal Causes of Haematuria

  • Tumour: Benign/Malignant
  • Glomerulonephritis
  • Calculi
  • Pyelonephritis
  • Trauma
  • Infarction with tissue necrosis, e.g., emboli
  • Think of glomeruli, tubules, and the pelvis of the kidney

Non-Renal Causes of Haematuria

  • Tumour Urinary Tract: TCC/Urothelial Ca
    • Bladder, Ureter, Urethra
  • Bladder causes
    • Urothelial, squamous cell, or adenocarcinoma
  • Stones
  • Infections - Cystitis
  • Anticoagulant Treatment

Investigations of Haematuria

  • Remember classification of investigations

    • Laboratory
    • Diagnostic imaging
    • Organ and site specific
  • An ultrasound of the kidney is indicated

  • Cystoscopy and biopsy of bladder lesion should be performed if present

  • IVP (intravenous pyelogram) is uncommonly used

  • A cystoscopy revealed a papillary tumour in the bladder

  • Benign and malignant are the possible characteristics of bladder tumours

  • Malignant is more common than benign

Types of Bladder Carcinoma

  • Urothelial Ca (also called Transitional cell)
  • Squamous Ca with Schistosomiasis and calculi (metaplasia)
  • Adenocarcinoma in urachal remnant, (Very rare) and colo/recto-vesical fistulae (also metaplasia)
  • Very occasional mets

Other Bladder Neoplasms

  • Sarcoma and Lymphoma are rare

PC of Bladder Carcinomas

  • Primary carcinoma symptoms and complications
    • Haematuria
    • Dysuria
    • Urgency
    • Hydro ureter due to obstruction of ureter
    • Hydronephrosis – due to obstruction of renal pelvis
    • Ureteric outflow obstruction

Prognosis of Bladder Carcinoma

  • Depends on type, grade, and stage (TNM)
  • T refers to level of invasion through the bladder

Management of Urothelial/TCC Bladder

  • Excision of Ca if early
  • Radical cystectomy for muscle invasive carcinoma
  • Treatment of Carcinoma in Situ - BCG

Aetiology of Bladder Cancer

  • Smoking
  • Aniline Dye
  • Stones
  • Chronic inflammation
  • Schistosomiasis

Haematuria

  • Has many causes
  • Could originate from Kidney, Bladder, Ureter, or Urethra
  • Requires imaging to determine its cause
  • Anticoagulation therapies, e.g. Warfarin and Heparin.

Case C - Male 43

  • PC: Severe colicky left loin pain over the last 2/7 with sudden onset an extreme severity.
  • Never unwell before

Differentials

  • Renal Colic is most likely
  • GIT obstruction
  • ? Gallstone colic

Urinalysis is a single test to distinguish between the possible conditions

  • Calcium Oxalate is the most common urinary stone at 80% by composition
  • Triple stones (Staghorn, MG, Ammonium, 15% Phosphate)
  • Uric Acid
  • Cystinuria / Oxalosis

Causes of Urinary Stones

  • Calcium/Oxalate Stones
    • Hypercalcaemia, e.g., increased PTH
    • Defect in tubular re-absorption of calcium
  • Triple stones
    • UTI's, especially Proteus due to urea breakdown to Alkaline urine to precipitation of salts
  • Uric Acid Stones
    • Hyperuricaemia

Other Causes of Renal Colic

  • Tumour - causing obstruction
  • Blood clot in the ureter – trauma or glomerular causes of haematuria – rare

Complications of Urinary Stones

  • Obstructed ureter leading to hydro ureter, hydronephrosis, and pyelonephritis
  • Stricture to the ureter
  • recurrent stones

Learning Outcomes

  • Summarise the Clinical and Pathological Features of Renal Cell Carcinoma
  • List the differential Diagnosis
  • Determine the prognosis of Renal Cell Carcinoma with reference to Grade and Stage
  • Classify Renal Calculi

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