Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 111: An elderly male presents with one episode of gross hematuria. Which of the following investigations is NOT recommended for this patient?

A. Cystoscopy
B. Urine microscopy for malignant cells
C. Urine tumor markers (Correct Answer)
D. Intravenous pyelogram

Explanation: **Explanation:** In an elderly male presenting with **painless gross hematuria**, the primary clinical objective is to rule out **Urothelial Carcinoma** (Bladder Cancer) and **Renal Cell Carcinoma**. **Why "Urine tumor markers" is the correct answer:** While several urine-based molecular markers (e.g., NMP22, BTA stat) exist, current clinical guidelines (AUA/EAU) do not recommend them for the initial evaluation of hematuria. They lack the necessary sensitivity and specificity to replace gold-standard diagnostic tools and often yield false positives in the presence of stones or inflammation. Therefore, they are **not recommended** for routine screening or primary diagnosis. **Analysis of other options:** * **Cystoscopy (A):** This is the **gold standard** for evaluating the lower urinary tract. It is mandatory in all patients over 35 years with gross hematuria to visualize bladder tumors. * **Urine microscopy/Cytology (B):** Cytology is a standard adjunct used to detect high-grade malignant cells or CIS (Carcinoma in situ) shed in the urine. * **Intravenous Pyelogram (D):** While CT Urography is now the preferred imaging modality, IVP remains a traditional and valid investigation to visualize the collecting system and ureters for filling defects. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Any painless gross hematuria in an elderly patient is **Malignancy** until proven otherwise. * **Initial Investigation of Choice:** Ultrasonography (KUB). * **Gold Standard for Bladder:** Cystoscopy. * **Gold Standard for Upper Tract:** CT Urography (Triple phase). * **Most common cause of hematuria (overall):** Urinary Tract Infection (UTI). * **Most common cause of hematuria (elderly):** Bladder Cancer.

Question 112: Which of the following statements regarding ureteric stones is false?

A. Urine is always infected.
B. Should be removed immediately.
C. Source is always the kidneys. (Correct Answer)
D. Pain is referred to the tip of the penis in intramural stones.

Explanation: ### Explanation **1. Why Option C is the Correct (False) Statement:** While the vast majority of ureteric stones originate in the kidney and migrate downwards, it is **not absolute**. Primary ureteric stones can form *de novo* within the ureter in specific pathological conditions, such as a **ureteric diverticulum**, severe stasis, or behind a long-standing ureteric stricture. In medical exams, absolute terms like "always" or "never" often indicate a false statement. **2. Analysis of Other Options:** * **Option A (Urine is always infected):** This is a **technically controversial** option in many textbooks; however, in the context of this specific question, Option C is the more definitive "false" answer. Clinically, while not every patient has a symptomatic UTI, urinary stasis behind a stone frequently leads to subclinical bacteriuria or secondary infection. * **Option B (Should be removed immediately):** This is generally considered **false** in modern practice as most small stones (<5mm) pass spontaneously. However, in the context of classical surgical teaching (and this specific question's framing), the focus is on the source of the stone. * **Option D (Pain referred to the tip of the penis):** This is a **true** clinical fact. When a stone reaches the **intramural (vesicoureteric) junction**, it causes irritation of the bladder wall. Since the bladder and the glans penis share the same nerve supply (S2-S4), pain is referred to the tip of the penis or the labia majora. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common site of impaction:** Vesicoureteric Junction (VUJ) — this is the narrowest part of the ureter. * **Narrowest points of the ureter:** (1) Pelviureteric junction, (2) Crossing of iliac vessels, (3) Vesicoureteric junction. * **Management:** Stones <5 mm usually pass with medical expulsive therapy (Alpha-blockers like Tamsulosin). * **Gold Standard Investigation:** Non-Contrast CT (NCCT) KUB.

Question 113: Sterile pyuria is seen in which of the following conditions?

A. Renal tuberculosis (Correct Answer)
B. Wilms tumor
C. Pelvic inflammatory disease
D. Diabetes mellitus

Explanation: **Explanation:** **Sterile pyuria** is defined as the presence of white blood cells (pus cells >5/HPF) in the urine in the absence of growth on standard culture media. **Renal Tuberculosis (A)** is the classic and most common cause of sterile pyuria in surgical practice. In Genitourinary TB (GUTB), the *Mycobacterium tuberculosis* bacilli cause chronic inflammation and ulceration of the urothelium, leading to the shedding of pus cells. However, because *M. tuberculosis* does not grow on routine aerobic culture media (it requires specific media like Lowenstein-Jensen), the culture is reported as "sterile." **Analysis of Incorrect Options:** * **Wilms Tumor (B):** Typically presents as an asymptomatic abdominal mass in children. While microscopic hematuria may occur, pyuria is not a characteristic feature unless there is a secondary infection. * **Pelvic Inflammatory Disease (C):** While PID can cause pyuria due to urethral irritation, it is usually associated with sexually transmitted pathogens (like *Chlamydia* or *Gonorrhea*) or polymicrobial infections that are not primarily classified under the classic surgical presentation of sterile pyuria. * **Diabetes Mellitus (D):** Diabetics are prone to UTIs, but these are typically "infected pyuria" caused by common organisms like *E. coli*, which grow readily on standard cultures. **Clinical Pearls for NEET-PG:** * **Other causes of sterile pyuria:** Partially treated bacterial UTI (most common overall), Renal stones, Polycystic Kidney Disease, and interstitial nephritis. * **GUTB Triad:** Frequency (earliest symptom), painless hematuria, and sterile pyuria. * **Gold Standard Diagnosis for GUTB:** Culture on LJ medium (takes 6–8 weeks) or BACTEC (faster). * **Radiological sign:** "Thimble bladder" (small capacity, fibrotic bladder) is a late feature of GUTB.

Question 114: Fir tree appearance of the bladder is seen in which condition?

A. Schistosomiasis
B. Neurogenic bladder (Correct Answer)
C. Tuberculosis
D. Pelvic abscess

Explanation: **Explanation:** The **"Fir tree" (or Christmas tree) appearance** of the bladder is a classic radiological sign seen on a cystogram, most commonly associated with a **Neurogenic Bladder** (specifically the spastic or hyperreflexic type). **1. Why Neurogenic Bladder is correct:** In conditions like spinal cord injury or multiple sclerosis, there is chronic detrusor-sphincter dyssynergia. The detrusor muscle must contract against a closed or non-relaxing sphincter, leading to high intravesical pressures. This causes **detrusor hypertrophy** and the formation of **trabeculations, sacculations, and diverticula**. On imaging, the bladder appears elongated, pointed at the dome, and has irregular, thickened walls, mimicking the silhouette of a fir tree. **2. Why other options are incorrect:** * **Schistosomiasis:** Characteristically shows **"fetal head" calcification** or linear calcification of the bladder wall due to the deposition of *Schistosoma haematobium* eggs. * **Tuberculosis:** Typically results in a **"Thimble bladder"** (a small-capacity, contracted, and fibrotic bladder) due to extensive scarring. * **Pelvic Abscess:** This would cause extrinsic compression or displacement of the bladder rather than intrinsic wall changes like trabeculations. **Clinical Pearls for NEET-PG:** * **Thimble Bladder:** Tuberculosis. * **Fetal Head Calcification:** Schistosomiasis. * **Teardrop Bladder:** Seen in pelvic hematoma or pelvic lipomatosis (extrinsic compression). * **Hourglass Bladder:** Can be congenital or due to urachal diverticulum/urachal remnants. * **Pinecone Bladder:** Another synonym for the Fir tree appearance in neurogenic bladder.

Question 115: What is the investigation of choice in ureteric colic?

A. Noncontrast CT scan (Correct Answer)
B. USG
C. X-ray KUB
D. Contrast-enhanced CT scan

Explanation: **Explanation:** The investigation of choice (Gold Standard) for acute ureteric colic is a **Non-Contrast Computed Tomography (NCCT) of the Kidney, Ureter, and Bladder (KUB)**. **1. Why NCCT KUB is the Correct Answer:** * **High Sensitivity and Specificity:** NCCT has a sensitivity of >95% and specificity of >97% for detecting urolithiasis. * **Detection of All Stone Types:** Unlike X-rays, NCCT can detect radiolucent stones (e.g., Uric acid stones) and very small stones (<3 mm). Only Indinavir stones (rarely seen in HIV patients) remain truly radiolucent on CT. * **Secondary Signs:** It identifies signs of obstruction like hydroureteronephrosis, perinephric stranding, and the "rim sign" (edema around the stone). * **Alternative Diagnosis:** It can identify non-urological causes of acute abdominal pain (e.g., appendicitis, diverticulitis). **2. Why Other Options are Incorrect:** * **USG:** It is the initial investigation of choice in **pregnant women and children** to avoid radiation. However, it is operator-dependent and often misses small mid-ureteric stones. * **X-ray KUB:** It misses radiolucent stones and small stones obscured by bowel gas or bony structures. Approximately 10-15% of stones are radiolucent. * **CECT:** Contrast is not required to visualize stones. In fact, excreted contrast in the ureter can mask the stone (both appear white/hyperdense), making diagnosis difficult. **High-Yield Clinical Pearls for NEET-PG:** * **Investigation of choice (Overall):** NCCT KUB. * **Best initial investigation (General):** USG or X-ray KUB (depending on institutional protocol). * **Investigation of choice in Pregnancy:** USG (1st line), MRI (2nd line), Low-dose CT (3rd line/last resort). * **Phleboliths vs. Stones:** On NCCT, stones show a "rim sign" (ureteric wall edema), whereas phleboliths (calcified pelvic veins) often show a "comet tail sign."

Question 116: A 65-year-old female presents with recurrent episodes of gross painless hematuria. What is the most common cause of gross painless hematuria?

A. Renal tuberculosis
B. Carcinoma of the bladder (Correct Answer)
C. Urethral stricture
D. Interstitial nephritis

Explanation: **Explanation:** **Why Carcinoma of the Bladder is Correct:** In any adult patient, particularly those over the age of 50, **painless gross hematuria** is considered **malignancy until proven otherwise**. Transitional Cell Carcinoma (TCC) of the urinary bladder is the most common cause of this presentation. The bleeding occurs due to the friable nature of the neoplastic tissue or the erosion of surface vessels by the tumor. In the context of NEET-PG, remember the "Rule of 60s": Bladder cancer typically presents in the 6th decade of life and is the most frequent urological malignancy causing visible, non-tender bleeding. **Why Other Options are Incorrect:** * **Renal Tuberculosis:** While it can cause hematuria, it is typically associated with "sterile pyuria" (pus cells in urine without bacterial growth) and irritative voiding symptoms (frequency, urgency). * **Urethral Stricture:** This usually presents with obstructive voiding symptoms (weak stream, straining, hesitancy). While it can cause terminal hematuria due to urethral mucosal irritation, it is rarely the cause of "gross painless hematuria." * **Interstitial Nephritis:** This is a renal parenchymal disease often presenting with microscopic hematuria, proteinuria, and sterile pyuria, usually secondary to drug reactions or systemic disease, rather than gross bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Cystoscopy is the most definitive investigation for bladder cancer. * **Initial Investigation:** Ultrasonography (USG) is usually the first-line screening tool. * **Most Common Type:** Transitional Cell Carcinoma (Urothelial Carcinoma) is the most common histological type (>90%). * **Risk Factors:** Smoking (most common) and occupational exposure to aromatic amines (e.g., Aniline dyes). * **Painful Hematuria:** Usually suggests calculi (stones) or infections (cystitis).

Question 117: What is the composition of this stone?

A. Calcium oxalate monohydrate
B. Calcium oxalate dihydrate (Correct Answer)
C. Ammonium urate
D. Calcium oxalate

Explanation: ***Calcium oxalate dihydrate*** - **Weddellite** stones have a characteristic **smooth, polished surface** with a **pyramidal or bipyramidal shape**. - Under microscopy, they appear as **octahedral or envelope-shaped crystals** that are typically **colorless and translucent**. *Calcium oxalate monohydrate* - **Whewellite** stones have a **rough, jagged surface** with **sharp projections** that can cause more tissue trauma. - Microscopically appears as **dumbbell or oval-shaped crystals** that are typically **yellow-brown in color**. *Ammonium urate* - These stones have a **yellow-brown color** and **smooth surface** but are **radiolucent** on plain X-rays. - Form in **alkaline urine** and are associated with **chronic diarrhea** or **ileostomy patients**. *Calcium oxalate* - This is a **generic term** that encompasses both monohydrate and dihydrate forms. - **Non-specific option** as it doesn't distinguish between the two distinct crystalline forms with different appearances.

Question 118: MEN 2A is associated with the following conditions, except:

A. Medullary Thyroid Carcinoma
B. Pituitary tumor (Correct Answer)
C. Pheochromocytoma
D. Hyperparathyroidism

Explanation: **Explanation:** The Multiple Endocrine Neoplasia (MEN) syndromes are autosomal dominant disorders caused by germline mutations in tumor suppressor genes or proto-oncogenes. This question tests the ability to differentiate between **MEN 1 (Wermer’s Syndrome)** and **MEN 2A (Sipple’s Syndrome)**. **Why Pituitary Tumor is the correct answer:** Pituitary tumors are a hallmark of **MEN 1**, not MEN 2A. MEN 1 is characterized by the "3 Ps": **P**ituitary adenomas, **P**arathyroid hyperplasia, and **P**ancreatic islet cell tumors. Therefore, its presence in a list describing MEN 2A makes it the "except" option. **Why the other options are incorrect (Features of MEN 2A):** MEN 2A is caused by a mutation in the **RET proto-oncogene** and classically involves: * **Medullary Thyroid Carcinoma (MTC):** Occurs in nearly 100% of patients; it is often the first manifestation. * **Pheochromocytoma:** Occurs in approximately 50% of patients; often bilateral and multifocal. * **Hyperparathyroidism:** Occurs in about 20-30% of patients due to parathyroid hyperplasia. **High-Yield Clinical Pearls for NEET-PG:** * **MEN 2A vs. 2B:** Both feature MTC and Pheochromocytoma. However, MEN 2A includes Hyperparathyroidism, while **MEN 2B** features Mucosal neuromas, Marfanoid habitus, and Medullated corneal nerve fibers (but *no* hyperparathyroidism). * **Screening:** In MEN 2A, prophylactic thyroidectomy is recommended by age 5. * **Surgical Priority:** If a patient has both MTC and Pheochromocytoma, **always resect the Pheochromocytoma first** to prevent a hypertensive crisis during thyroid surgery.

Question 119: A 60-year-old male presents with a poor stream of urine, a post-void residual urine volume of 400 mL, bilateral hydronephrosis, and a prostate weighing 70 g. His urea is 120 mg/dL and creatinine is 3.5 mg/dL. What is the ideal next immediate step?

A. Catheterize with Foley catheter (Correct Answer)
B. Bilateral percutaneous nephrostomies
C. CT scan to rule out carcinoma
D. MRI pelvis

Explanation: ### **Explanation** The patient presents with **Benign Prostatic Hyperplasia (BPH)** complicated by **chronic urinary retention**, leading to obstructive uropathy (bilateral hydronephrosis) and **post-renal azotemia** (elevated urea and creatinine). **1. Why Option A is Correct:** The immediate priority in any patient with renal failure due to bladder outlet obstruction is to **relieve the obstruction**. Catheterization with a Foley catheter is the simplest, fastest, and most effective way to drain the bladder, reduce intravesical pressure, and allow the kidneys to recover. This is the first step in managing "obstructive uropathy" before any definitive surgical intervention (like TURP) can be considered. **2. Why Other Options are Incorrect:** * **Option B (Bilateral PCN):** Percutaneous nephrostomy is indicated for supra-vesical (ureteric) obstruction. In this case, the obstruction is at the level of the prostate (infra-vesical), so draining the bladder is sufficient. * **Option C & D (CT/MRI):** While imaging is useful for staging malignancy, they have no role in the **immediate** management of acute-on-chronic renal failure. Stabilizing renal function takes precedence over definitive diagnostic imaging. **3. Clinical Pearls for NEET-PG:** * **Post-obstructive Diuresis:** After catheterization, monitor the patient for massive diuresis. If output >200 mL/hr, replace fluids with ½ Normal Saline to prevent electrolyte imbalance. * **Azotemia in BPH:** Surgery (TURP) is contraindicated while the patient is in renal failure. Always stabilize creatinine levels via catheterization first. * **Indications for Surgery in BPH:** Refractory urinary retention, recurrent UTIs, hematuria, bladder stones, and **renal insufficiency** (post-renal failure).

Question 120: What is the treatment of choice for ureteric colic?

A. Nitrites
B. Pethidine
C. Adrenaline
D. None of the above (Correct Answer)

Explanation: **Explanation:** The treatment of choice for ureteric colic has evolved significantly in modern clinical practice. Currently, **Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)**, specifically **Diclofenac** (75mg IM or 50mg oral/rectal), are considered the first-line treatment of choice. They work by inhibiting prostaglandin synthesis, which reduces ureteric smooth muscle spasm, decreases renal pelvic pressure, and reduces local edema. **Analysis of Options:** * **A. Nitrites:** These are vasodilators primarily used in angina or cyanide poisoning. They have no proven clinical efficacy in relieving the intense visceral pain of ureteric colic. * **B. Pethidine:** While opioids were historically used, they are no longer the "choice" because they can induce vomiting and may cause spasm of the sphincter of Oddi. If an opioid is required for refractory pain, **Morphine** is generally preferred over Pethidine. * **C. Adrenaline:** This is a sympathomimetic used in anaphylaxis or cardiac arrest. It has no role in managing renal colic and could potentially worsen the patient's physiological stress. Since the gold standard (NSAIDs) is not listed, **Option D (None of the above)** is correct. **High-Yield Clinical Pearls for NEET-PG:** 1. **First-line Analgesia:** NSAIDs (Diclofenac) are superior to opioids for ureteric colic. 2. **Medical Expulsive Therapy (MET):** For stones <10mm, **Alpha-blockers (Tamsulosin)** are used to relax the distal ureter and facilitate stone passage. 3. **Gold Standard Investigation:** Non-contrast Computed Tomography (**NCCT KUB**) is the investigation of choice for diagnosing ureteric calculi. 4. **Emergency Indication:** If a patient has ureteric colic with fever (infected hydronephrosis), it is a surgical emergency requiring immediate decompression via a **DJ stent** or **percutaneous nephrostomy (PCN)**.

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Renal Cell Carcinoma

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Testicular Tumors

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Urology — MCQs

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