Urology Practice Questions

Q: Which among the following is the most important preventive strategy of penile cancer?

Neonatal circumcision. **Explanation:** The primary risk factor for penile squamous cell carcinoma (SCC) is **phimosis**, which leads to the accumulation of smegma and chronic inflammation (balanoposthitis). **Neonatal circumcision** is considered the most effective preventive strategy because it virtually eliminates the risk of phimosis and facilitates better local hygiene. Epidemiological studies show that penile cancer is extremely rare in communities where neonatal circumcision is universal (e.g., Jewish populations). Notably, circumcision performed in adulthood does not offer the same level of protection as neonatal circumcision. **Analysis of Incorrect Options:** * **HPV Vaccination (A):** While HPV (Types 16 and 18) is associated with approximately 40-50% of penile cancers, it is not the most significant preventive factor compared to the mechanical protection offered by circumcision. * **Condom Use (B):** Condoms reduce the risk of HPV and other STIs but do not address the risk posed by smegma accumulation or phimosis in uncircumcised males. * **Cessation of Smoking (D):** Smoking is a known independent risk factor for penile cancer (likely due to the accumulation of carcinogenic metabolites in the preputial sac), but its impact is secondary to the protective effect of circumcision. **Clinical Pearls for NEET-PG:** * **Most common type:** Squamous Cell Carcinoma (95%). * **Precancerous lesions:** Erythroplasia of Queyrat (glans), Bowen’s disease (shaft), and Balanitis Xerotica Obliterans (BXO). * **Protective Factor:** Neonatal circumcision is the single most important protective factor. * **Risk Factors:** Phimosis (highest risk), HPV 16/18, smoking, and poor hygiene.

Q: Cabana procedure is done in which of the following conditions?

Sentinel lymph node biopsy in penile carcinoma. **Explanation:** The **Cabana procedure** refers to the identification and biopsy of the **Sentinel Lymph Node (SLN)** in patients with **Carcinoma of the Penis**. In 1977, Ramon Cabana performed lymphangiograms and identified a specific group of lymph nodes located near the superficial epigastric vein and the pudendal vein, which he termed the "sentinel nodes." The underlying medical concept is that lymphatic spread from the penis follows a predictable pattern, first reaching these specific nodes. If the sentinel node is negative for metastasis, the remaining nodes in the inguinal basin are likely clear, thereby sparing the patient from the high morbidity associated with a radical inguinal lymphadenectomy (e.g., skin necrosis, lymphedema). **Analysis of Options:** * **Option A & B:** While Carcinoma of the testis involves lymphatic spread, it primarily drains to the **para-aortic (retroperitoneal)** lymph nodes. The surgical management is Radical Orchidectomy followed by **Retroperitoneal Lymph Node Dissection (RPLND)**, not the Cabana procedure. * **Option D:** While the Cabana procedure is used *for* penile cancer, it specifically refers to the **biopsy technique (SLNB)** rather than the definitive treatment of the primary tumor or a radical nodal clearance. **High-Yield Clinical Pearls for NEET-PG:** * **Cabana’s Node:** Located at the junction of the epigastric and long saphenous veins. * **Modern Technique:** Today, SLNB is more accurately performed using **Dynamic Sentinel Node Biopsy (DSNB)** involving Technetium-99m sulfur colloid and isosulfan blue dye. * **Indication:** Recommended for patients with clinically non-palpable inguinal nodes (cN0) but high-risk primary tumors (≥T1G2).

Q: A young man presents with primary infertility, and his semen analysis reveals low volume, fructose-negative ejaculate with azoospermia. Which of the following is the most useful imaging modality to evaluate the cause of his infertility?

Transrectal ultrasonography. ### Explanation The clinical presentation of **azoospermia** (no sperm), **low semen volume** (<1.5 ml), and **fructose-negative** ejaculate is a classic triad suggesting **Ejaculatory Duct Obstruction (EDO)** or Congenital Bilateral Absence of the Vas Deferens (CBAVD). **Why Transrectal Ultrasonography (TRUS) is the correct answer:** Fructose is produced in the seminal vesicles. If the ejaculate is fructose-negative and low volume, it indicates that the secretions from the seminal vesicles are not reaching the urethra. TRUS is the gold standard imaging modality to visualize the prostate, seminal vesicles, and ejaculatory ducts. It can identify dilated seminal vesicles (>15mm width), ejaculatory duct cysts, or calcifications causing the obstruction, which are potentially treatable causes of male infertility. **Analysis of Incorrect Options:** * **A. Colour duplex ultrasonography of the scrotum:** This is the investigation of choice for **Varicocele** or testicular pathology. While it can detect the absence of the vas in the scrotum, it cannot visualize the ejaculatory ducts or seminal vesicles. * **C. Retrograde urethrography (RGU):** Used primarily to diagnose urethral strictures or trauma; it does not provide information regarding the internal male reproductive tract. * **D. Spermatic venography:** This is an invasive "gold standard" for diagnosing subclinical varicoceles but is rarely used today and is irrelevant to obstructive azoospermia. **NEET-PG High-Yield Pearls:** * **Normal Semen pH:** Alkaline (>7.2). In EDO/CBAVD, the semen is often **acidic** because the alkaline seminal vesicle fluid is missing. * **CBAVD Association:** Strongly associated with **CFTR gene mutations** (Cystic Fibrosis). * **Treatment of EDO:** Transurethral Resection of the Ejaculatory Ducts (TURED). * **Initial Test for Infertility:** Semen analysis (performed after 2–7 days of abstinence).

Q: What investigation is done to differentiate between stress incontinence and detrusor instability?

Urodynamic study. **Explanation:** The differentiation between **Stress Urinary Incontinence (SUI)** and **Detrusor Overactivity (Urge Incontinence)** is primarily functional rather than anatomical. 1. **Why Urodynamic Study (UDS) is correct:** Urodynamics is the gold standard for evaluating lower urinary tract function. * In **Stress Incontinence**, UDS (specifically cystometry) demonstrates involuntary leakage of urine in the absence of a detrusor contraction when intra-abdominal pressure rises (e.g., coughing/Valsalva). * In **Detrusor Instability**, UDS shows involuntary detrusor contractions during the filling phase, which the patient cannot suppress. Since management differs significantly (Surgery for SUI vs. Pharmacotherapy for Detrusor instability), UDS is crucial for an accurate diagnosis. 2. **Why other options are incorrect:** * **Cystourethroscopy:** This is an anatomical study used to rule out bladder stones, tumors, or urethral diverticula. It cannot assess the functional pressure changes required to diagnose instability. * **MCU (Micturating Cystourethrogram):** Primarily used to diagnose Vesicoureteral Reflux (VUR), posterior urethral valves, or bladder neck anomalies. It does not provide real-time pressure-flow data. * **Retrograde Urethroscopy:** Used to visualize urethral strictures or trauma; it has no role in evaluating incontinence. **High-Yield Clinical Pearls for NEET-PG:** * **First-line investigation** for any urinary incontinence is a **Frequency-Volume Chart (Bladder Diary)**. * **Q-tip test:** Used to assess urethral hypermobility in SUI (positive if angle >30°). * **Gold Standard for SUI:** Mid-urethral slings (TVT/TOT). * **Gold Standard for Detrusor Instability:** Anticholinergics (e.g., Oxybutynin) or Mirabegron (Beta-3 agonist).

Q: Which is the earliest symptom of benign prostatic hyperplasia?

Frequency. ### Explanation **1. Why Frequency is the Correct Answer:** Benign Prostatic Hyperplasia (BPH) causes bladder outlet obstruction, leading to compensatory changes in the detrusor muscle. The **earliest symptoms** of BPH are typically **irritative symptoms**, of which **nocturia** and **frequency** are the most common initial presentations. * **Mechanism:** As the prostate enlarges, the bladder must work harder to push urine past the obstruction. This leads to detrusor hypertrophy and hypersensitivity. The bladder becomes "irritable," meaning it signals the urge to void even at low volumes, resulting in increased frequency. **2. Analysis of Incorrect Options:** * **B. Hematuria:** While BPH can cause hematuria (due to congestion of friable veins over the enlarged prostate), it is usually a later sign or a complication rather than the presenting symptom. * **C. Incontinence:** This is a late-stage symptom. It typically manifests as **overflow incontinence** when the bladder is chronically overdistended and can no longer compensate for the obstruction. * **D. Strangury:** This refers to slow, painful urination where urine is passed drop by drop. It is more characteristic of severe bladder neck obstruction, stones, or acute cystitis, rather than the early phase of BPH. **3. Clinical Pearls for NEET-PG:** * **Symptom Classification:** BPH symptoms are divided into **Storage (Irritative)** (Frequency, Urgency, Nocturia) and **Voiding (Obstructive)** (Hesitancy, Poor stream, Intermittency, Feeling of incomplete emptying). * **Earliest Symptom:** Frequency/Nocturia. * **Most Troublesome Symptom:** Nocturia (often cited as the reason patients seek medical help). * **First Obstructive Symptom:** Hesitancy. * **Gold Standard Investigation:** Uroflowmetry (shows a "prolonged, low-peak" flow rate). * **Gold Standard Treatment:** TURP (Transurethral Resection of the Prostate).

Q: Diversion of the urinary bladder is best achieved using which part of the gastrointestinal tract?

Ileum. **Explanation:** The **ileum** is the gold standard and most commonly used segment for urinary diversion (e.g., Ileal Conduit/Bricker’s procedure or Orthotopic Neobladder). **Why Ileum is the Correct Answer:** 1. **Anatomical Suitability:** It has a highly mobile mesentery with a robust, predictable blood supply (via the ileocolic and intestinal arteries), allowing it to be easily mobilized to the skin or the urethral stump. 2. **Functional Balance:** It has a smaller surface area and lower absorptive capacity compared to the jejunum, which minimizes life-threatening electrolyte imbalances. 3. **Compliance:** The terminal ileum is easily "detubularized" to create a low-pressure reservoir, which is essential for protecting the upper urinary tract from reflux and high pressures. **Analysis of Incorrect Options:** * **Jejunum (A):** Rarely used because it leads to severe **"Jejunal Conduit Syndrome"** (hyponatremia, hypochloremia, hyperkalemia, and metabolic acidosis) due to its high secretory and absorptive activity. * **Cecum (C) & Colon (D):** While the colon (especially the sigmoid) can be used, it has a higher bacterial load, thicker walls that are harder to detubularize, and is associated with a higher risk of hyperchloremic metabolic acidosis compared to the ileum. **High-Yield Clinical Pearls for NEET-PG:** * **Most common metabolic abnormality:** Hyperchloremic metabolic acidosis (seen with ileum and colon). * **Standard Procedure:** The **Ileal Conduit** is the most common non-continent urinary diversion. * **Contraindication:** Avoid using bowel segments in patients with pre-existing inflammatory bowel disease (IBD) or significant renal insufficiency (CrCl < 35-40 ml/min). * **Vitamin Deficiency:** Long-term use of the terminal ileum can lead to **Vitamin B12 deficiency** and bile acid malabsorption.

Q: A man was brought to the emergency department after a perineal injury. He experiences an urge to micturate but is unable to pass urine. Blood is seen at the tip of the urethra, and there is swelling of the penis and scrotum. What is the most likely diagnosis?

Bulbar urethra injury. **Explanation:** The clinical presentation describes a classic case of **Bulbar Urethra Injury**, which is the most common site of anterior urethral trauma. **1. Why Bulbar Urethra Injury is correct:** The mechanism of injury is typically a **straddle injury** (perineal trauma), where the bulbar urethra is crushed against the pubic symphysis. The hallmark triad seen here includes: * **Urethrorrhagia:** Blood at the external meatus. * **Urinary retention:** Inability to void despite the urge. * **Butterfly Hematoma/Swelling:** If Buck’s fascia is breached, urine and blood extravasate into the scrotum and penis, limited by Colles' fascia (explaining the specific swelling pattern). **2. Why other options are incorrect:** * **Penile Urethra Rupture:** Usually occurs due to a "fracture" of the penis during intercourse. While it causes swelling, it is less common than bulbar injury in perineal trauma. * **Membranous Urethra Injury:** This is a **posterior urethral injury**, almost always associated with **pelvic fractures** (e.g., RTA). Key findings include a "high-riding prostate" on DRE and extravasation into the retropubic space (Space of Retzius), not the scrotum. * **Urinary Bladder Injury:** Intraperitoneal rupture presents with signs of peritonitis; extraperitoneal rupture is associated with pelvic fractures. Neither typically presents with blood at the urethral meatus or scrotal swelling. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Retrograde Urethrogram (RUG). **Never** attempt catheterization before RUG if urethral injury is suspected. * **Fascial Boundaries:** Extravasation in bulbar injury is limited by **Colles' fascia** (continuous with Scarpa’s fascia of the abdomen), preventing spread to the thighs but allowing spread to the abdominal wall. * **Management:** Initial management involves a **Suprapubic Cystostomy (SPC)** to divert urine.

Q: What is the most common site of genitourinary tuberculosis?

Kidney. **Explanation:** Genitourinary tuberculosis (GUTB) is the second most common form of extrapulmonary tuberculosis. The **Kidney** is the primary site of infection in the genitourinary tract. **Why Kidney is the Correct Answer:** The infection is almost always **hematogenous**, spreading from a primary focus (usually the lungs) via the bloodstream. The bacilli lodge in the highly vascularized glomerular and peritubular capillaries. Initially, these form microscopic cortical granulomas. If the body's immunity fails, these granulomas enlarge and rupture into the nephron, leading to "Putz's cast" (tuberculous debris) and the characteristic "moth-eaten" appearance of calyces on imaging. **Analysis of Incorrect Options:** * **Ureter:** Involvement is always **secondary** to renal TB. It occurs via "descending infection" through the urine. It commonly results in strictures, particularly at the ureterovesical junction (UVJ). * **Bladder:** This is also a secondary infection caused by infected urine from the kidney. It leads to characteristic findings like "golf-hole ureters" and a "thimble bladder" (fibrosed, low-capacity bladder). * **Urethra:** This is the least common site of GUTB and usually occurs secondary to advanced bladder or prostatic tuberculosis. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Sign:** Sterile pyuria (pus cells in urine with no growth on routine culture). * **Earliest Radiological Sign:** Erosion/fuzziness of the minor calyces (moth-eaten appearance). * **Gold Standard Diagnosis:** Urine culture for *M. tuberculosis* (Lowenstein-Jensen medium), typically requiring three to five consecutive early morning midstream urine samples. * **Key Pathognomonic Finding:** Putty Kidney (autonephrectomy) – a non-functioning, calcified kidney seen in end-stage disease.

Question 1

Which among the following is the most important preventive strategy of penile cancer?

Accepted Answer

Neonatal circumcision

Answer

HPV vaccination

Answer

Condom use

Answer

Cessation of smoking

Question 2

Cabana procedure is done in which of the following conditions?

Accepted Answer

Sentinel lymph node biopsy in penile carcinoma

Answer

Carcinoma of testis

Answer

Retroperitoneal lymph node dissection

Answer

Carcinoma of penis

Question 3

A young man presents with primary infertility, and his semen analysis reveals low volume, fructose-negative ejaculate with azoospermia. Which of the following is the most useful imaging modality to evaluate the cause of his infertility?

Accepted Answer

Transrectal ultrasonography

Answer

Colour duplex ultrasonography of the scrotum

Answer

Retrograde urethrography

Answer

Spermatic venography

Question 4

What investigation is done to differentiate between stress incontinence and detrusor instability?

Accepted Answer

Urodynamic study

Answer

Cystourethroscopy

Answer

MCU

Answer

Retrograde urethroscopy

Question 5

What is true about carcinoma of the penis?

Accepted Answer

Arises from the corona of the glans

Answer

Pain is frequent

Answer

Occurs more commonly in uncircumcised males

Answer

Metastasis is common

Question 6

Which is the earliest symptom of benign prostatic hyperplasia?

Accepted Answer

Frequency

Answer

Hematuria

Answer

Incontinence

Answer

Strangury

Question 7

Diversion of the urinary bladder is best achieved using which part of the gastrointestinal tract?

Accepted Answer

Ileum

Answer

Jejunum

Answer

Cecum

Answer

Colon

Question 8

A man was brought to the emergency department after a perineal injury. He experiences an urge to micturate but is unable to pass urine. Blood is seen at the tip of the urethra, and there is swelling of the penis and scrotum. What is the most likely diagnosis?

Accepted Answer

Bulbar urethra injury

Answer

Penile urethra rupture

Answer

Membranous urethra injury

Answer

Urinary bladder injury

Question 9

What is the most reliable investigation in bladder rupture?

Accepted Answer

Retrograde cystogram

Answer

Intravenous pyelogram (IVP)

Answer

Cystoscopy

Answer

Catheterisation

Question 10

What is the most common site of genitourinary tuberculosis?

Accepted Answer

Kidney

Answer

Ureter

Answer

Bladder

Answer

Urethra

Urology — MCQs

Urology — MCQs

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