Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 251: What is the most common cause of urinary ascites?

A. Pelviureteral junction obstruction
B. Posterior urethral valves (Correct Answer)
C. Urethral stricture
D. None of the above

Explanation: **Explanation:** **Posterior Urethral Valves (PUV)** are the most common cause of urinary ascites. This condition occurs almost exclusively in male neonates. The underlying mechanism involves high-pressure infravesical obstruction caused by the valves, leading to back-pressure changes. This pressure causes the rupture of the renal pelvis or a "forniceal tear," allowing urine to leak into the retroperitoneal space and subsequently transudate into the peritoneal cavity. This process, known as **perirenal extravasation**, acts as a "pop-off" mechanism that may actually protect the renal parenchyma from the full effects of high-pressure obstruction. **Analysis of Options:** * **Posterior Urethral Valves (Correct):** As the most common cause of congenital bladder outlet obstruction, it is the leading etiology for spontaneous urinary leakage in newborns. * **Pelviureteral Junction (PUJ) Obstruction:** While a common cause of neonatal hydronephrosis, it rarely leads to rupture or ascites because the obstruction is usually not as acute or high-pressure as PUV. * **Urethral Stricture:** This is an acquired cause of obstruction seen more commonly in adults. While it can cause urinary retention or extravasation into the scrotum/perineum (e.g., extravasation of urine in a bulbous urethral tear), it is a very rare cause of intraperitoneal urinary ascites compared to PUV. **High-Yield Pearls for NEET-PG:** * **Diagnosis:** Neonatal urinary ascites is often the first sign of PUV. It presents with abdominal distension and failure to thrive. * **Biochemical Hallmark:** Elevated serum creatinine and urea (due to peritoneal reabsorption of urine) and hyponatremia. * **Imaging:** The gold standard for diagnosing PUV is **Voiding Cystourethrogram (VCUG)**, which typically shows a dilated posterior urethra and a "keyhole sign." * **Management:** Initial management involves bladder drainage (catheterization) followed by endoscopic valve ablation.

Question 252: Which is the earliest symptom of benign prostatic hyperplasia?

A. Frequency (Correct Answer)
B. Hematuria
C. Incontinence
D. Strangury

Explanation: ### 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).

Question 253: Diversion of the urinary bladder is best achieved using which part of the gastrointestinal tract?

A. Jejunum
B. Ileum (Correct Answer)
C. Cecum
D. Colon

Explanation: **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.

Question 254: Which of the following procedures is suitable for day care surgery?

A. Lateral sphincterotomy (Correct Answer)
B. Rhinoplasty
C. Orchidectomy
D. Total thyroidectomy

Explanation: **Explanation:** The concept of **Day Care Surgery** (Ambulatory Surgery) refers to surgical procedures where the patient is admitted, operated upon, and discharged on the same calendar day. The ideal procedure for day care is one that is minimally invasive, has a low risk of postoperative hemorrhage or airway compromise, and allows for rapid mobilization. **Lateral Internal Sphincterotomy (LIS)** is the gold standard treatment for chronic anal fissure. It is highly suitable for day care because it is a brief procedure (usually under 20 minutes), involves minimal blood loss, and postoperative pain is typically manageable with oral analgesics. Patients can usually void and ambulate immediately after the effects of anesthesia wear off. **Analysis of Incorrect Options:** * **Rhinoplasty:** While often done as an outpatient procedure in some settings, it frequently requires extensive nasal packing and monitoring for postoperative epistaxis or airway obstruction, making it less "ideal" in a generalized surgical context compared to LIS. * **Orchidectomy:** Though a relatively short procedure, it carries a risk of scrotal hematoma and requires careful monitoring of the wound and pain management, often necessitating an overnight stay for observation. * **Total Thyroidectomy:** This is **absolutely contraindicated** for day care surgery due to the high risk of life-threatening complications such as **postoperative hematoma** (leading to airway compression) and **hypocalcemia** (due to parathyroid injury), which require 24–48 hours of observation. **High-Yield Clinical Pearls for NEET-PG:** * **Selection Criteria:** Patients should be ASA Grade I or II with a BMI < 30 and have a responsible adult at home for the first 24 hours. * **Other common Day Care procedures:** Herniotomy (pediatric), Laparoscopic Cholecystectomy (in selected cases), Cataract surgery, and Varicose vein surgery. * **LIS Technique:** The incision is made in the internal sphincter up to the dentate line to reduce resting anal pressure.

Question 255: All of the following are true about bladder cancer, except?

A. Painless hematuria is seen
B. Transitional cell carcinoma is the commonest type
C. It is more common in males
D. None of the above (Correct Answer)

Explanation: **Explanation:** Bladder cancer is a high-yield topic in NEET-PG Surgery. This question tests the fundamental epidemiological and clinical characteristics of the disease. The correct answer is **"None of the above"** because all the statements provided (A, B, and C) are clinically accurate. 1. **Painless Hematuria (Option A):** This is the **most common presenting symptom** of bladder cancer (seen in ~85% of cases). It is typically intermittent, gross, and total (occurring throughout the stream). In urology, "painless gross hematuria in an elderly patient is bladder cancer until proven otherwise." 2. **Transitional Cell Carcinoma (Option B):** Also known as **Urothelial Carcinoma**, this is the most common histological type worldwide, accounting for >90% of cases. (Note: Squamous cell carcinoma is more common only in regions endemic for *Schistosoma haematobium*). 3. **Gender Predilection (Option C):** Bladder cancer is significantly more common in **males** than females (ratio approx. 3:1 to 4:1), largely due to historical differences in smoking prevalence and occupational exposure to carcinogens. **Clinical Pearls for NEET-PG:** * **Risk Factors:** Smoking (most common), Aniline dyes (2-Naphthylamine), Cyclophosphamide, and Chronic irritation (stones/catheters predisposing to SCC). * **Gold Standard Investigation:** Cystoscopy with biopsy. * **Staging:** The TNM system is used; the involvement of the **detrusor muscle (T2)** is the critical "watershed" line that determines whether treatment is breast-conserving (TURBT + intravesical BCG) or radical (Cystectomy). * **Most common site:** Lateral wall of the bladder.

Question 256: 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?

A. Penile urethra rupture
B. Bulbar urethra injury (Correct Answer)
C. Membranous urethra injury
D. Urinary bladder injury

Explanation: **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.

Question 257: What is the most common cause of surgically treatable male infertility?

A. Varicocele (Correct Answer)
B. Cryptorchidism
C. Urethral stricture
D. Epididymitis

Explanation: ### Explanation **Correct Answer: A. Varicocele** **Why it is correct:** Varicocele is the most common cause of **correctable (surgically treatable)** male infertility, found in approximately 35–40% of men with primary infertility and up to 80% of men with secondary infertility. It is characterized by the abnormal dilation and tortuosity of the pampiniform venous plexus. The underlying mechanism for infertility involves **increased scrotal temperature**, venous stasis leading to hypoxia, and the reflux of adrenal/renal metabolites. These factors impair spermatogenesis and decrease sperm motility and morphology. Surgical intervention (Varicocelectomy) is the gold standard treatment to improve semen parameters. **Why the other options are incorrect:** * **B. Cryptorchidism:** While undescended testes are a significant risk factor for infertility and germ cell tumors, surgical correction (Orchidopexy) must ideally be done before age 1 to preserve fertility. If performed in adulthood, it rarely restores fertility if damage has already occurred. * **C. Urethral stricture:** This causes obstructive voiding symptoms but is a rare cause of infertility. It only affects fertility if it leads to retrograde ejaculation or severe ejaculatory dysfunction. * **D. Epididymitis:** This is an inflammatory/infectious condition. While chronic bilateral epididymitis can cause obstructive azoospermia, it is primarily managed medically (antibiotics). Surgery is not the primary treatment for the infertility it causes. **High-Yield Clinical Pearls for NEET-PG:** * **Side Predominance:** Varicoceles are more common on the **left side** (90%) because the left spermatic vein enters the left renal vein at a right angle. * **Sudden Right-sided Varicocele:** In an older patient, a sudden-onset isolated right-sided varicocele should raise suspicion for **Renal Cell Carcinoma (RCC)** obstructing the IVC. * **Physical Exam:** Often described as a **"bag of worms"** appearance, which increases in size with the Valsalva maneuver. * **Gold Standard Investigation:** Color Doppler Ultrasound.

Question 258: What is the most common site of genitourinary tuberculosis?

A. Kidney (Correct Answer)
B. Ureter
C. Bladder
D. Urethra

Explanation: **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 259: Which of the following is NOT a feature of hypernephroma?

A. Persistent pyrexia
B. Hematuria
C. Polycythemia
D. Lower pole involvement (Correct Answer)

Explanation: **Explanation:** Hypernephroma, also known as **Renal Cell Carcinoma (RCC)**, is the most common primary renal malignancy. The correct answer is **D (Lower pole involvement)** because RCC classically has a predilection for the **upper pole** of the kidney. **Why the other options are features of RCC:** * **Hematuria (Option B):** This is the most common presenting symptom. Along with loin pain and a palpable mass, it forms the "Classic Triad" of RCC (though seen in only 10% of cases, usually indicating advanced disease). * **Persistent Pyrexia (Option A):** RCC is known as the "Internist's Tumor" because it frequently presents with **Paraneoplastic Syndromes (PNS)**. Pyrexia (fever) occurs due to the release of endogenous pyrogens like Interleukin-6. * **Polycythemia (Option C):** This is another classic PNS caused by the ectopic production of **Erythropoietin (EPO)** by the tumor cells, leading to an elevated red blood cell count. **High-Yield Clinical Pearls for NEET-PG:** 1. **Origin:** RCC arises from the **Proximal Convoluted Tubule (PCT)**. 2. **Risk Factors:** Smoking (most significant), obesity, hypertension, and Von Hippel-Lindau (VHL) syndrome. 3. **Stauffer’s Syndrome:** Reversible hepatic dysfunction (elevated LFTs) in the absence of liver metastases—a high-yield paraneoplastic feature. 4. **Varicocele:** A left-sided varicocele that does not empty in the supine position suggests a left renal tumor obstructing the left gonadal vein. 5. **Investigation of Choice:** Contrast-Enhanced CT (CECT) of the abdomen and pelvis.

Question 260: Postmicturition dribbling is due to

A. Detrusor overactivity
B. Urethral stricture causing decreased dribbling
C. Collection of urine in the U-shaped curve of the bulb of the penis (Correct Answer)
D. Neurogenic bladder

Explanation: **Explanation:** **Postmicturition Dribbling (PMD)** is a common Lower Urinary Tract Symptom (LUTS) characterized by the involuntary loss of urine immediately after a person has finished voiding. **Why Option C is Correct:** The primary anatomical cause of PMD is the **pooling of urine in the bulbous urethra**. The male urethra has a natural U-shaped curve at the bulb of the penis. In some individuals, the **bulbocavernosus muscle** fails to contract sufficiently at the end of micturition to evacuate this dependent portion of the urethra. When the patient moves or stands up straight after voiding, gravity or physical movement causes this trapped urine to leak out. **Why Other Options are Incorrect:** * **Option A (Detrusor Overactivity):** This typically leads to **Urge Incontinence**, where the patient feels a sudden, uncontrollable need to void, rather than leaking *after* the act is complete. * **Option B (Urethral Stricture):** While strictures cause a weak stream and terminal dribbling (dribbling at the very end of the flow), PMD specifically refers to the leak that occurs *after* leaving the toilet. * **Option D (Neurogenic Bladder):** This usually presents with overflow incontinence or total loss of control depending on the level of the lesion (spastic vs. flaccid), rather than isolated post-void leakage. **Clinical Pearls for NEET-PG:** * **Management:** The first-line treatment for PMD is **Urethral Milking** (bulbar urethral massage), where the patient manually pushes the trapped urine forward from the perineum toward the glans. * **Pelvic Floor Exercises:** Strengthening the bulbocavernosus muscle can also help. * **Differential:** Do not confuse PMD with **Terminal Dribbling**, which is a classic sign of **Benign Prostatic Hyperplasia (BPH)**.

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Renal Cell Carcinoma

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Urology — MCQs

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