Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 521: In male patients, genital tuberculosis preferentially affects which of the following organs?

A. Epididymis (Correct Answer)
B. Orchitis
C. Prostatitis
D. Penis

Explanation: **Explanation:** Genital tuberculosis (TB) in males is almost always secondary to a primary focus elsewhere, usually the lungs or the urinary tract (kidneys). **Why Epididymis is the correct answer:** The **epididymis** is the most common site of involvement in male genital TB. The infection typically reaches the epididymis via two routes: 1. **Hematogenous spread:** The most common route, where bacilli lodge in the highly vascular globus minor (tail) of the epididymis. 2. **Retrograde spread:** Infected urine from the prostate or seminal vesicles travels via the vas deferens. Clinically, it presents as a "painless, hard, craggy" swelling. Because the epididymis is the primary site, the infection often spreads to the testis only later in the disease course. **Analysis of Incorrect Options:** * **B. Orchitis (Testis):** Isolated TB orchitis is rare. The testis is usually involved secondary to the epididymis (epididymo-orchitis) because the blood-testis barrier provides some initial protection against hematogenous seeding. * **C. Prostatitis:** While the prostate is frequently involved in the overall complex of urogenital TB, it is rarely the primary or most prominent site of clinical presentation compared to the epididymis. * **D. Penis:** Tuberculosis of the penis is extremely rare and usually occurs due to direct inoculation or as a secondary complication of advanced systemic TB. **High-Yield Clinical Pearls for NEET-PG:** * **Pathognomonic sign:** "Beaded appearance" of the vas deferens due to multiple granulomatous strictures. * **Scrotal Findings:** TB often leads to a "cold abscess" which may rupture to form a **posterior scrotal sinus**. * **Urinary Findings:** Sterile pyuria (pus cells in urine but negative routine culture) is a classic hallmark of renal TB, which often coexists with genital TB. * **Infertility:** Genital TB is a significant cause of obstructive azoospermia in males.

Question 522: A 58-year-old male presents with acute onset of varicocele on the left side. What is the most probable cause?

A. Carcinoma of testis
B. Epididymitis
C. Inguinal lymphadenopathy
D. Carcinoma of kidney (Correct Answer)

Explanation: The correct answer is **Carcinoma of Kidney (Renal Cell Carcinoma - RCC)**. [1] **1. Why Carcinoma of Kidney is correct:** The left testicular vein drains at a right angle into the **left renal vein**, whereas the right testicular vein drains directly into the Inferior Vena Cava (IVC). In cases of Renal Cell Carcinoma, a tumor thrombus can extend into the left renal vein, causing an obstruction to the outflow of the left testicular vein. This leads to venous congestion and the sudden development of a **secondary varicocele**. [1] A key clinical indicator is that a secondary varicocele (unlike primary) typically **does not decompress** when the patient lies supine. [1] **2. Why other options are incorrect:** * **Carcinoma of Testis:** While it may cause a scrotal mass, it does not typically cause a varicocele unless there is extensive retroperitoneal lymphadenopathy obstructing the renal vein, which is less common than direct RCC involvement. * **Epididymitis:** This is an inflammatory condition presenting with pain, fever, and swelling (Prehn’s sign positive), not a varicocele. * **Inguinal Lymphadenopathy:** While it can cause lymphatic obstruction (leading to lymphedema), it does not obstruct the deep venous drainage of the pampiniform plexus required to form a varicocele. **3. High-Yield Clinical Pearls for NEET-PG:** * **Sudden onset varicocele in an elderly patient** is a classic "red flag" for Renal Cell Carcinoma. [1] * **Right-sided varicocele:** If isolated, it is highly suspicious of a retroperitoneal mass or situs inversus, as the right testicular vein usually drains directly into the IVC. * **Primary Varicocele:** Most common on the left side (90%) due to the "Nutcracker effect" (compression of the left renal vein between the SMA and Aorta). * **Investigation of Choice:** Contrast-Enhanced CT (CECT) of the Abdomen to rule out a renal mass.

Question 523: What is the treatment of choice for polycystic kidney disease?

A. Cyst aspiration
B. Nephrectomy
C. Dialysis
D. None of the above (Correct Answer)

Explanation: **Explanation:** The treatment of choice for Autosomal Dominant Polycystic Kidney Disease (ADPKD) is **supportive and conservative management**, aimed at controlling complications rather than curing the cysts themselves. Since the question asks for the "treatment of choice" and lists specific interventions that are only used in end-stage or complicated scenarios, "None of the above" is the correct answer. **Why the options are incorrect:** * **Cyst Aspiration (A):** This is not a definitive treatment. It is only performed for symptomatic relief of very large, painful cysts or infected cysts. Cysts almost invariably recur after aspiration. * **Nephrectomy (B):** This is a radical procedure reserved only for specific indications: intractable pain, recurrent severe infections, suspected malignancy, or to create space for a future renal transplant. It is not the standard treatment. * **Dialysis (C):** This is a renal replacement therapy used only when the patient reaches End-Stage Renal Disease (ESRD). It manages the failure of the organ, not the disease itself. **Clinical Pearls for NEET-PG:** 1. **Standard of Care:** The mainstay of management is **Blood Pressure control** (using ACE inhibitors or ARBs) to slow the progression of renal failure. 2. **Tolvaptan:** A Vasopressin V2-receptor antagonist, it is the only FDA-approved drug proven to slow the increase in kidney volume and the decline in GFR. 3. **Definitive Treatment:** For ESRD in ADPKD, the treatment of choice is **Renal Transplantation**. 4. **Extra-renal Manifestations:** Always remember the "Rule of 10s" or common associations: Berry aneurysms (Circle of Willis), Hepatic cysts (most common extra-renal site), and Mitral Valve Prolapse (MVP).

Question 524: In the "three glass test," shreds are present only in the first glass. What is the likely diagnosis?

A. Cystitis
B. Renal pathology
C. Anterior urethritis (Correct Answer)
D. Prostatitis

Explanation: The **Three-Glass Test** (Stamey-Meares test) is a classic diagnostic tool used to localize the site of infection or inflammation in the lower urinary tract by examining different portions of the urinary stream. ### **Explanation of the Correct Answer** * **Anterior Urethritis:** The first 10–15 ml of urine (the **first glass**) flushes out inflammatory debris, pus, or "shreds" located in the **anterior urethra** (distal to the urogenital diaphragm). Since the subsequent flow of urine comes from the bladder and passes through a now-cleansed urethra, the second and third glasses remain clear. Therefore, shreds isolated to the first glass are pathognomonic for anterior urethritis. ### **Why Other Options are Incorrect** * **Cystitis (Bladder Pathology):** If the infection is in the bladder, inflammatory cells and debris are mixed uniformly with the urine. Consequently, shreds or pyuria would be present equally in **all three glasses**. * **Renal Pathology:** Similar to cystitis, if the source is the upper urinary tract (kidneys/ureters), the urine is contaminated before it reaches the bladder, leading to uniform findings across **all three glasses**. * **Prostatitis:** In prostatic involvement, the first two glasses are usually clear. The **third glass** (terminal urine) contains shreds or pus because the contraction of the prostate gland at the end of micturition squeezes out prostatic secretions. ### **High-Yield NEET-PG Pearls** * **Initial Hematuria:** Blood in the first glass only → Lesion in the **Anterior Urethra**. * **Terminal Hematuria:** Blood in the third glass only → Lesion in the **Prostatic Urethra, Bladder Neck, or Trigone**. * **Total Hematuria:** Blood in all three glasses → Lesion in the **Bladder or Kidneys**. * **Modern Practice:** While the three-glass test is high-yield for exams, it has largely been replaced in clinical practice by the **Two-Glass Test** (pre- and post-prostatic massage) for diagnosing chronic prostatitis.

Question 525: Which of the following is a characteristic adverse effect of posterior urethral valve?

A. Palpable bladder
B. Hydronephrosis
C. Painful stress incontinence (Correct Answer)
D. Recurrent UTI

Explanation: **Explanation:** **Posterior Urethral Valves (PUV)** are the most common cause of bladder outlet obstruction in male infants. The condition results from abnormal mucosal folds in the prostatic urethra, leading to significant voiding dysfunction. **Why Option C is Correct:** While PUV typically presents with a poor urinary stream and dribbling, **painful stress incontinence** is a classic, paradoxical characteristic. In these patients, the bladder is chronically distended and under high pressure. Any increase in intra-abdominal pressure (coughing, crying, or straining) overcomes the high urethral resistance, leading to the involuntary leakage of urine. This is often associated with pain due to the underlying bladder hypertrophy and detrusor instability. **Analysis of Incorrect Options:** * **A. Palpable bladder:** While a palpable bladder is a common clinical finding in PUV due to chronic retention, it is a **sign**, not a specific "characteristic adverse effect" in the context of this specific question's comparative pathology. * **B. Hydronephrosis:** This is a secondary complication resulting from high-pressure reflux or obstruction. While frequently present, it is a consequence of the disease progression rather than a specific symptomatic characteristic like incontinence. * **D. Recurrent UTI:** UTIs are common in PUV due to stasis, but they are a non-specific complication seen in almost all obstructive uropathies. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Voiding Cystourethrogram (VCUG) – shows a dilated posterior urethra and a "spinning top" appearance. * **Initial Management:** Catheterization (using a small feeding tube) to decompress the bladder. * **Definitive Treatment:** Endoscopic primary valve ablation (fulguration). * **Potter Sequence:** Severe PUV can lead to oligohydramnios in utero, resulting in pulmonary hypoplasia (the most common cause of death).

Question 526: A "Chinese lantern" appearance on transillumination is characteristic of which condition?

A. Spermatocele
B. Epididymal cyst (Correct Answer)
C. Hydrocele of the cord
D. Secondary hydrocele

Explanation: **Explanation:** The "Chinese lantern" appearance is a classic clinical sign of an **epididymal cyst**. This phenomenon occurs because an epididymal cyst is typically multilocular (composed of multiple small compartments). When a bright light is applied during transillumination, the internal septa between these fluid-filled locules cast shadows, creating a patterned, glowing effect reminiscent of a traditional Chinese lantern. **Analysis of Options:** * **Epididymal Cyst (Correct):** These are fluid-filled retention cysts arising from the efferent ductules. They contain clear, straw-colored fluid and are characteristically multilocular, leading to the "Chinese lantern" sign. * **Spermatocele (Incorrect):** While also transilluminant, a spermatocele is usually unilocular and contains "barley water" fluid (opalescent fluid with spermatozoa). It does not typically show the septated lantern appearance. * **Hydrocele of the Cord (Incorrect):** This is a localized collection along the spermatic cord. While it transilluminates, it appears as a uniform, smooth, "brilliant" glow without internal septation. * **Secondary Hydrocele (Incorrect):** This is fluid accumulation in the tunica vaginalis secondary to underlying pathology (e.g., orchitis or tumor). It usually presents with uniform transillumination (if the fluid is clear) or may be opaque if the underlying testis is significantly enlarged or the fluid is turbid. **High-Yield Clinical Pearls for NEET-PG:** * **Epididymal Cyst vs. Spermatocele:** Epididymal cysts are usually found at the head (caput) of the epididymis and are often multiple. * **Position:** Both lie above and behind the testis; the testis can be felt separately from the swelling (unlike a vaginal hydrocele). * **Fluid Characteristics:** Epididymal cyst = Clear fluid; Spermatocele = Milky/Opalescent fluid containing dead sperms.

Question 527: Which of the following nutritional consequences is possible following peptic ulcer surgeries other than vagotomy?

A. Iron deficiency
B. Weight loss
C. Vitamin B12 deficiency
D. Folic acid deficiency (Correct Answer)

Explanation: Following gastric surgeries for peptic ulcer disease (such as Billroth I, Billroth II, or Total/Partial Gastrectomy), several nutritional deficiencies can occur due to the loss of gastric surface area, bypass of the duodenum, and rapid gastric emptying. **Explanation of the Correct Answer:** **D. Folic acid deficiency:** While less common than B12 deficiency, folic acid deficiency occurs in approximately 5% of post-gastrectomy patients. The primary cause is **decreased dietary intake** (due to early satiety or dumping syndrome) and, occasionally, **malabsorption** if the proximal jejunum (the primary site of folate absorption) is bypassed or affected by bacterial overgrowth in a blind loop. **Explanation of Incorrect Options:** * **A. Iron deficiency:** This is the **most common** nutritional complication. It occurs because gastric acid (reduced post-surgery) is required to convert ferric iron ($Fe^{3+}$) to the absorbable ferrous ($Fe^{2+}$) state, and the primary site of absorption (duodenum) is often bypassed. * **B. Weight loss:** This is a very common clinical finding post-gastrectomy due to reduced gastric capacity and "small stomach syndrome," leading to decreased caloric intake. * **C. Vitamin B12 deficiency:** This occurs due to the loss of **Intrinsic Factor** (secreted by parietal cells), which is essential for B12 absorption in the terminal ileum. It is most pronounced after total gastrectomy. **High-Yield Clinical Pearls for NEET-PG:** * **Most common deficiency:** Iron deficiency anemia. * **Megaloblastic anemia:** Post-gastrectomy megaloblastic anemia is usually due to Vitamin B12 deficiency, but if B12 levels are normal, folate deficiency should be suspected. * **Bone Disease:** Osteomalacia and osteoporosis are common late complications due to Vitamin D and Calcium malabsorption. * **Dumping Syndrome:** A common vasomotor and GI complication caused by rapid emptying of hypertonic chyme into the small intestine.

Question 528: A 58-year-old male presents with hematuria. He is diagnosed with bladder cancer that extends into the muscle layer. What is the best treatment?

A. Intravesical Chemotherapy
B. Neoadjuvant chemotherapy followed by radical cystectomy (Correct Answer)
C. Radiotherapy
D. Transurethral resection

Explanation: **Explanation:** The clinical scenario describes **Muscle-Invasive Bladder Cancer (MIBC)**, defined as a tumor invading the detrusor muscle (Stage T2 or higher). **1. Why Option B is Correct:** The gold standard treatment for MIBC is **Radical Cystectomy (RC)** with pelvic lymph node dissection. However, current evidence-based guidelines (NCCN/EAU) strongly recommend **Neoadjuvant Chemotherapy (NAC)**—typically cisplatin-based—prior to surgery. NAC treats micrometastatic disease and has been shown to improve overall 5-year survival by approximately 5-8% compared to surgery alone. **2. Why Other Options are Incorrect:** * **Option A (Intravesical Chemotherapy):** This is indicated for Non-Muscle Invasive Bladder Cancer (NMIBC), specifically low-to-intermediate risk cases (e.g., Stage Ta/T1) to prevent recurrence. It cannot penetrate the muscle layer. * **Option C (Radiotherapy):** While used in "Bladder Preservation Protocols" (Trimodality therapy), it is generally reserved for patients who are unfit for surgery or refuse cystectomy. It is not the primary "best" treatment. * **Option D (Transurethral Resection of Bladder Tumor - TURBT):** TURBT is the initial diagnostic and staging tool. While it can "clear" NMIBC, it is insufficient for MIBC as it cannot ensure complete eradication of deep muscle invasion. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common histological type:** Transitional Cell Carcinoma (Urothelial Carcinoma). * **Staging:** T2 indicates invasion into the muscularis propria (the "muscle-invasive" threshold). * **Radical Cystectomy Limits:** In males, it involves removal of the bladder, prostate, seminal vesicles, and distal ureters. In females, it includes the bladder, urethra, uterus, ovaries, and anterior vaginal wall. * **Gold Standard for NMIBC (High Risk):** Intravesical BCG (Bacillus Calmette-Guérin).

Question 529: Which of the following is NOT a feature of Posterior Urethral Valve?

A. Palpable bladder
B. Painful stress incontinence (Correct Answer)
C. Recurrent UTI
D. Hydronephrosis

Explanation: **Explanation:** Posterior Urethral Valve (PUV) is the most common cause of bladder outlet obstruction in male infants. It results from abnormal mucosal folds in the prostatic urethra, leading to high-pressure urinary retention. **Why "Painful stress incontinence" is the correct answer:** Stress incontinence refers to the involuntary leakage of urine during activities that increase intra-abdominal pressure (e.g., coughing). In PUV, the primary mechanism is **overflow incontinence** (dribbling due to a chronically distended bladder) rather than stress incontinence. Furthermore, incontinence in PUV is typically painless; "painful stress incontinence" is not a recognized clinical feature of this congenital condition. **Analysis of Incorrect Options:** * **Palpable bladder:** Due to chronic obstruction at the urethral level, the bladder becomes hypertrophied and chronically distended, making it easily palpable (often firm and non-tender) on physical examination. * **Recurrent UTI:** Urinary stasis caused by the obstruction provides a nidus for bacterial growth, leading to frequent urinary tract infections, which may progress to urosepsis. * **Hydronephrosis:** High intravesical pressures lead to vesicoureteral reflux (VUR) and bilateral hydroureteronephrosis, which can eventually result in renal dysplasia and chronic kidney disease. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Poor urinary stream (dribbling), palpable bladder, and bilateral hydronephrosis. * **Diagnosis:** **MCUG (Voiding Cystourethrogram)** is the gold standard, showing a dilated posterior urethra and a "spinning top" appearance. * **Initial Management:** Bladder drainage via a small-feeding tube (avoid Foley if possible) and stabilization of electrolytes. * **Definitive Treatment:** Endoscopic primary valve ablation (fulguration).

Question 530: Which of the following renal stones is purely radiolucent?

A. Struvite
B. Cystine
C. Xanthine (Correct Answer)
D. Calcium oxalate

Explanation: **Explanation:** The radiopacity of a renal stone depends on its effective atomic number and density. Stones containing calcium or heavy elements appear radiopaque, while those composed of organic compounds without such elements are radiolucent. **Why Xanthine is Correct:** Xanthine stones are **purely radiolucent**. They occur due to a rare genetic deficiency of the enzyme xanthine oxidase or as a side effect of Allopurinol therapy. Because xanthine is a pure organic compound lacking high-atomic-weight minerals, it does not attenuate X-rays and remains invisible on plain radiographs (KUB). **Analysis of Incorrect Options:** * **Struvite (Magnesium Ammonium Phosphate):** These are **radiopaque**. Often associated with Proteus infections and staghorn calculi, they contain magnesium and phosphate which provide moderate density. * **Cystine:** These are **faintly radiopaque** (often described as "ground-glass" appearance). While organic, they contain sulfur atoms which provide enough density to be visible on X-rays. * **Calcium Oxalate:** These are **highly radiopaque**. As the most common type of renal stone, the high calcium content makes them easily visible on plain films. **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic for Radiolucent Stones (U.X.):** **U**ric acid and **X**anthine. (Note: Uric acid is the most common radiolucent stone; Xanthine is the rarest). * **Matrix Stones:** These are also radiolucent but rare, typically seen in patients with chronic UTIs. * **Investigation of Choice:** Non-contrast CT (NCCT) is the gold standard for all stones, as even "radiolucent" stones like uric acid and xanthine are visible (hyperdense) on CT. * **Indinavir Stones:** These are the only stones that are truly **radiolucent even on CT scan**.

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