Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 641: Which of the following statements regarding varicocele is not true?

A. It involves the testicular veins.
B. It is more common on the right side. (Correct Answer)
C. It may be the first feature of a renal tumor.
D. It feels like a bag of worms.

Explanation: **Explanation:** A varicocele is the abnormal dilation and tortuosity of the **pampiniform plexus of veins** within the spermatic cord. **Why Option B is the Correct Answer (The False Statement):** Varicocele is significantly more common on the **left side (approx. 90%)**. This is due to three anatomical reasons: 1. **Drainage Angle:** The left testicular vein enters the left renal vein at a **90-degree angle**, whereas the right testicular vein enters the IVC at an oblique angle, allowing smoother flow. 2. **Length:** The left testicular vein is longer, leading to higher hydrostatic pressure. 3. **Nutcracker Phenomenon:** The left renal vein can be compressed between the Superior Mesenteric Artery (SMA) and the Aorta, causing backpressure. **Analysis of Other Options:** * **Option A:** It involves the testicular veins (specifically the pampiniform plexus). * **Option C:** A sudden-onset right-sided varicocele or a non-reducible left varicocele can be the first sign of a **Renal Cell Carcinoma (RCC)**. This occurs if a tumor thrombus obstructs the renal vein, blocking testicular venous drainage. * **Option D:** On palpation, a varicocele classically feels like a **"bag of worms,"** which becomes more prominent when the patient stands or performs the Valsalva maneuver. **High-Yield Clinical Pearls for NEET-PG:** * **Grading:** Grade I (Palpable only with Valsalva), Grade II (Palpable without Valsalva), Grade III (Visible through scrotal skin). * **Infertility:** Varicocele is the most common reversible cause of male infertility (causes increased scrotal temperature and oxidative stress). * **Surgery:** Indications include infertility with abnormal semen analysis or testicular atrophy. The **Gold Standard** surgical approach is **Subinguinal Microsurgical Varicocelectomy** (lowest recurrence and complication rates).

Question 642: All of the following are true about vasectomy, EXCEPT:

A. It takes about 3 months before the sperm stores are used up.
B. Sperm granulomas are less common if electrocautery is used. (Correct Answer)
C. Reversal is most successful within 10 years of the initial surgery.
D. There is a risk of chronic testicular pain.

Explanation: **Explanation:** The correct answer is **B**. This statement is false because **electrocautery actually increases the risk of sperm granulomas**. A sperm granuloma is an inflammatory response to leaking sperm. When electrocautery is used to seal the vas deferens, it can cause thermal damage and necrosis of the tissue, which may lead to a higher incidence of "blowouts" or leakage from the proximal stump compared to simple ligation or mucosal cautery techniques. **Analysis of other options:** * **Option A:** It takes approximately **3 months (or 20 ejaculations)** to achieve azoospermia. Patients must use alternative contraception until two consecutive semen analyses confirm the absence of sperm. * **Option C:** Vasectomy reversal (Vasovasostomy) success is time-dependent. Success rates are highest (up to 90%) if performed within **10 years**; after this period, secondary changes in the epididymis and the development of anti-sperm antibodies reduce the chances of pregnancy. * **Option D:** **Post-vasectomy pain syndrome (PVPS)** is a recognized complication, characterized by chronic testicular pain lasting >3 months, affecting about 1-2% of patients. **High-Yield Clinical Pearls for NEET-PG:** * **Most common complication:** Hematoma or infection. * **Most common late complication:** Sperm granuloma (most frequent at the site of the proximal stump). * **No-Scalpel Vasectomy (NSV):** Associated with fewer infections and hematomas compared to the traditional incisional method. * **Failure Rate:** Approximately 0.1% (1 in 1000), usually due to recanalization.

Question 643: A patient presents with pain in the right lumbar region. What is the most likely diagnosis?

A. Acute cholecystitis
B. Acute pyelonephritis
C. Right renal calculus (Correct Answer)
D. Left renal calculus

Explanation: **Explanation:** The **right lumbar region** (also known as the right flank) is the anatomical location primarily occupied by the right kidney and the ascending colon. Pain originating from the kidney or ureter typically manifests as "renal colic"—a sharp, severe pain localized to the lumbar region that may radiate towards the groin (loin to void). **Why Option C is correct:** A **Right renal calculus** is the most common cause of acute, severe pain localized specifically to the right lumbar region. The pain is caused by the distension of the renal capsule or the ureter due to obstruction. The clinical presentation of "lumbar pain" is a classic descriptor for renal pathology on the affected side. **Analysis of Incorrect Options:** * **A. Acute cholecystitis:** This typically presents with pain in the **Right Hypochondrium** (RUQ), often radiating to the right shoulder or scapula (Boas' sign), rather than the lumbar region. * **B. Acute pyelonephritis:** While this causes lumbar pain, it is almost always accompanied by systemic symptoms like high-grade fever with chills, rigors, and pyuria. In a general presentation of "lumbar pain," a calculus is statistically more likely unless infectious symptoms are specified. * **D. Left renal calculus:** This would present with pain in the **left** lumbar region, not the right. **NEET-PG High-Yield Pearls:** * **Pain Mapping:** Remember the 9 abdominal regions. Lumbar = Flank/Kidney; Hypochondrium = Gallbladder/Liver/Spleen; Iliac = Appendix/Ovaries. * **Radiation:** Renal pain radiates from **Loin to Groin** (T10-L1 dermatomes). * **Gold Standard Investigation:** Non-Contrast Computed Tomography (NCCT) KUB is the investigation of choice for suspected renal calculi. * **Murphy’s Punch:** Tenderness at the costovertebral angle is a hallmark of renal involvement (calculus or pyelonephritis).

Question 644: Which of the following structures is not damaged during vasectomy?

A. Testicular artery
B. Ilioinguinal nerve (Correct Answer)
C. Autonomic nerve
D. Pampiniform plexus

Explanation: ### Explanation **1. Why the Ilioinguinal Nerve is the Correct Answer:** Vasectomy is a surgical procedure involving the ligation and excision of a segment of the **Vas Deferens**. During the procedure, the surgeon accesses the vas deferens through a small incision in the scrotal skin. The **ilioinguinal nerve (L1)** enters the inguinal canal through the internal ring but exits through the superficial inguinal ring to supply the skin of the upper medial thigh and the **root of the penis/anterior scrotum**. Because the vasectomy is performed on the **body of the scrotum** (distal to the nerve's distribution) and the nerve lies outside the spermatic cord fascia at the level of the scrotal sac, it is not at risk of damage during a standard vasectomy. **2. Analysis of Incorrect Options:** * **Testicular Artery:** This is the primary blood supply to the testis, located within the spermatic cord in close proximity to the vas deferens. Accidental injury can lead to hematoma or testicular atrophy. * **Autonomic Nerves:** The vas deferens is surrounded by a rich plexus of autonomic nerves (sympathetic fibers from T10-L1) responsible for peristalsis during ejaculation. These are inevitably divided when the vas is cut. * **Pampiniform Plexus:** This is a network of small veins surrounding the testicular artery and vas deferens. It is the most common structure injured during vasectomy, leading to the most frequent complication: **scrotal hematoma**. **3. Clinical Pearls for NEET-PG:** * **Most common complication of vasectomy:** Scrotal Hematoma (due to pampiniform plexus injury). * **Sterility Timeline:** Vasectomy is not immediately effective. Patients must use contraception until **two consecutive semen analyses** show azoospermia (usually 12 weeks or 20 ejaculations). * **Anatomical Landmark:** The vas deferens is identified by its "cord-like" or "whipcord" feel during palpation. * **Nerve Supply:** The **Genitofemoral nerve (genital branch)** is more likely to be encountered within the cord than the ilioinguinal nerve.

Question 645: A 15-year-old male presents with a long-standing complaint of difficulty in directing his urinary stream. Examination of his penis reveals the urethral meatus opening on the ventral side, proximal to the tip of the glans penis. What is the most common type of abnormality seen in this boy?

A. Glandular (Correct Answer)
B. Penile
C. Scrotal
D. Perineal

Explanation: ### Explanation The clinical presentation describes **Hypospadias**, a congenital anomaly where the urethral meatus is located on the ventral aspect of the penis rather than at the tip of the glans. It is characterized by a triad of: an ectopic urethral meatus, chordee (ventral curvature), and a hooded prepuce (deficient ventral foreskin). **Why Glandular is Correct:** Hypospadias is classified based on the anatomical location of the meatus. The **Glandular (or Distal)** type is the most common variety, accounting for approximately **60-70%** of all cases. In this type, the opening is located on the glans or at the coronal sulcus. Because it is the most frequent presentation in clinical practice, it is the correct answer. **Analysis of Incorrect Options:** * **B. Penile:** These are "mid-shaft" hypospadias. While common, they occur less frequently than distal/glandular types. * **C. Scrotal & D. Perineal:** These are classified as **Proximal** hypospadias. They are the most severe forms but are the least common (occurring in about 10-15% of cases). They are often associated with significant chordee and potential disorders of sexual development (DSD). **High-Yield Clinical Pearls for NEET-PG:** 1. **Contraindication:** Circumcision is **strictly contraindicated** in these patients because the foreskin is required for future surgical reconstruction (urethroplasty). 2. **Associated Anomalies:** Cryptorchidism (undescended testis) and inguinal hernias are the most common associated findings. 3. **Timing of Surgery:** The ideal age for surgical correction is between **6 to 12 months** of age. 4. **Embryology:** It results from the failure of the urethral folds to fuse on the ventral surface.

Question 646: A patient presents with pain and tenderness in the left iliac fossa. Ultrasonography shows a 3 cm stone in the renal pelvis without any hydronephrosis. What is the most appropriate management?

A. Percutaneous Nephrolithotomy (PCNL) (Correct Answer)
B. Extracorporeal Shock Wave Lithotripsy (ESWL)
C. Diuretics
D. Medical dissolution therapy with potassium citrate

Explanation: ### Explanation The patient presents with a **3 cm stone in the renal pelvis**. According to the current EAU (European Association of Urology) guidelines, the size of the stone is the primary determinant for the choice of intervention. **1. Why PCNL is the Correct Answer:** * **Stone Size:** For renal stones **>20 mm (2 cm)**, Percutaneous Nephrolithotomy (PCNL) is the gold standard and first-line treatment. It offers the highest stone-free rate (SFR) in a single setting for large calculi. * **Location:** A 3 cm stone in the renal pelvis is too large for effective fragmentation by ESWL and would likely result in "Steinstrasse" (stone street) or incomplete clearance. **2. Why Other Options are Incorrect:** * **ESWL (Option B):** This is generally preferred for stones **<20 mm**. For stones larger than 2 cm, the success rate drops significantly, and the risk of ureteral obstruction from fragmented debris increases. * **Diuretics (Option C):** Diuretics have no role in the active management or dissolution of a 3 cm pelvic stone. * **Medical Dissolution Therapy (Option D):** Potassium citrate is used for **Uric Acid stones**. However, even for uric acid stones, a 3 cm stone usually requires surgical debulking or intervention due to the time required for dissolution and the risk of symptoms. **Clinical Pearls for NEET-PG:** * **First-line for <10 mm stone:** ESWL or RIRS (Retrograde Intrarenal Surgery). * **First-line for 10–20 mm stone:** ESWL, RIRS, or PCNL (depending on location, e.g., lower pole stones >10 mm often favor PCNL/RIRS). * **First-line for >20 mm stone:** PCNL. * **Staghorn Calculi:** PCNL is the treatment of choice. * **Steinstrasse:** A complication of ESWL where fragmented stone pieces obstruct the ureter.

Question 647: Frey's procedure is done for which of the following conditions?

A. Meckel's diverticulum
B. Auriculotemporal neuropathy
C. Ulcerative colitis
D. Chronic pancreatitis (Correct Answer)

Explanation: **Explanation:** **Frey’s procedure** (also known as Local Resection of the Head of the Pancreas with Longitudinal Pancreaticojejunostomy) is a surgical intervention specifically designed for **Chronic Pancreatitis**. It is indicated when a patient presents with a dilated main pancreatic duct and an inflammatory mass in the head of the pancreas. The procedure combines two techniques: 1. **Decompression:** A longitudinal incision of the main pancreatic duct (similar to the Partington-Rochelle procedure). 2. **Resection:** Core resection (excavation) of the diseased pancreatic head, which removes the "pacemaker" of pain while preserving the duodenum. **Analysis of Incorrect Options:** * **A. Meckel’s Diverticulum:** Managed by simple diverticulectomy or wedge resection. * **B. Auriculotemporal Neuropathy:** This is a distractor related to **Frey’s Syndrome** (gustatory sweating), which occurs after parotid surgery due to injury to the auriculotemporal nerve. While the names are identical, the *procedure* is for the pancreas. * **C. Ulcerative Colitis:** Typically managed by Total Proctocolectomy with Ileal Pouch-Anal Anastomosis (IPAA). **NEET-PG Clinical Pearls:** * **Distinction:** Do not confuse Frey’s **Procedure** (Pancreas) with Frey’s **Syndrome** (Parotid/Sweating). * **Comparison:** Unlike the **Whipple procedure**, Frey’s is "duodenum-preserving." * **Other Pancreatic Procedures:** * *Puestow/Partington-Rochelle:* Only decompression (duct drainage). * *Beger Procedure:* Resection of the head only (no duct drainage). * *Frey’s:* Hybrid of both (Resection + Drainage).

Question 648: A 60-year-old male smoker presents with one day of painless gross hematuria. Intravenous urography (IVU) shows a 1.2 cm filling defect at the lower pole of the infundibulum. What is the next best investigation to be done?

A. Cystoscopy (Correct Answer)
B. Urine cytology
C. Ultrasound abdomen
D. DMSA scan

Explanation: ### Explanation **1. Why Cystoscopy is the Correct Answer:** The clinical presentation of **painless gross hematuria** in an elderly male smoker is **bladder cancer** until proven otherwise. While the IVU shows a filling defect in the upper tract (infundibulum), bladder tumors are significantly more common than upper tract urothelial carcinomas (UTUC). Furthermore, urothelial tumors are often **multifocal** (field change theory). In any patient over 40 with unexplained gross hematuria, **Cystoscopy** is the gold standard and mandatory initial investigation to rule out synchronous bladder lesions, which occur in approximately 10–15% of patients with upper tract tumors. It allows for direct visualization and biopsy. **2. Why Other Options are Incorrect:** * **Urine Cytology (B):** While useful for detecting high-grade malignant cells, it has low sensitivity for low-grade tumors and cannot localize the lesion. It is an adjunct, not the definitive next step. * **Ultrasound Abdomen (C):** Ultrasound is a good screening tool but lacks the sensitivity of IVU or CT Urography for small infundibular filling defects (1.2 cm) and cannot reliably rule out small bladder tumors. * **DMSA Scan (D):** This is a functional renal scan used to assess cortical scarring (e.g., in pediatric reflux or pyelonephritis). It has no role in the evaluation of hematuria or suspected malignancy. **3. Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Painless gross hematuria in an elderly smoker = **Cystoscopy + CT Urography.** * **Filling Defect on IVU (Differential Diagnosis):** "Radiolucent" stones (Uric acid), Urothelial Carcinoma, Blood clot, or Sloughed papilla. * **Field Change Theory:** The entire urothelium (from renal pelvis to urethra) is at risk; hence, if you find a tumor in one location, you must check the others. * **Most common site for UTUC:** Renal pelvis, followed by the ureter.

Question 649: A six-year-old female presents with constipation and urinary retention. On examination, a presacral mass is noted. What is the most probable diagnosis?

A. Pelvic neuroblastoma
B. Rectal duplication cyst
C. Sacrococcygeal teratoma
D. Anterior sacral meningocele (Correct Answer)

Explanation: **Explanation:** The clinical presentation of a **presacral mass** causing compression of the rectum (constipation) and the bladder neck/urethra (urinary retention) in a child is highly suggestive of **Anterior Sacral Meningocele (ASM)**. **Why it is correct:** Anterior sacral meningocele is a rare form of spinal dysraphism where the meninges protrude through a defect in the anterior aspect of the sacrum into the retroperitoneal/presacral space. The mass is filled with CSF and communicates with the subarachnoid space. The pressure exerted by this enlarging cyst on pelvic organs leads to the classic triad of symptoms: constipation, urinary disturbances, and occasionally dysmenorrhea or headaches (due to CSF pressure changes during defecation). **Why other options are incorrect:** * **Sacrococcygeal Teratoma (SCT):** While this is the most common germ cell tumor in neonates, it usually presents as an **external** mass (Type I) at birth. Type IV is purely internal/presacral, but ASM is a more classic "textbook" association with the specific combination of urinary retention and constipation in this age group, especially if associated with the "Scimitar sign." * **Pelvic Neuroblastoma:** This is a solid malignant tumor. While it can cause mass effects, it is usually associated with systemic symptoms, catecholamine excess, or neurological deficits rather than simple mechanical obstruction. * **Rectal Duplication Cyst:** These are rare congenital anomalies. While they can cause constipation, they do not typically communicate with the spinal canal and are less likely to cause acute urinary retention compared to the midline pressure of a meningocele. **High-Yield Pearls for NEET-PG:** 1. **Currarino Triad:** A classic association consisting of (1) Anorectal malformation, (2) Sacral bony defect (Scimitar sacrum), and (3) Presacral mass (most commonly Anterior Sacral Meningocele). 2. **Scimitar Sign:** A pathognomonic radiological finding on X-ray showing a smooth, curved unilateral sacral defect resembling a Turkish sword. 3. **Contraindication:** Never perform a needle biopsy or aspiration of a presacral mass until a meningocele is ruled out, as this can lead to **meningitis**.

Question 650: In the differential diagnosis of epididymo-orchitis and testicular torsion, what is an important distinguishing feature?

A. Elevation of the testis relieves pain in testicular torsion.
B. Elevation of the testis relieves pain in epididymo-orchitis. (Correct Answer)
C. Tenderness is characteristic of testicular torsion.
D. Fever is characteristic of epididymo-orchitis.

Explanation: This question focuses on the clinical differentiation between **Testicular Torsion** (a surgical emergency) and **Epididymo-orchitis** (an inflammatory condition). ### 1. Why the Correct Answer is Right The phenomenon described is known as **Prehn’s Sign**. * In **Epididymo-orchitis**, elevating the scrotum relieves the gravitational pull on the inflamed epididymis and suspensory structures, thereby **reducing pain** (Positive Prehn’s sign). * In **Testicular Torsion**, elevation of the testis does not relieve the pain and may actually aggravate it because the mechanical twist of the spermatic cord remains unchanged or worsens (Negative Prehn’s sign). ### 2. Analysis of Incorrect Options * **Option A:** Incorrect. As explained above, elevation typically worsens or has no effect on the pain of torsion. * **Option C:** Incorrect because **tenderness is characteristic of both** conditions. While the localization may differ initially (epididymal vs. diffuse testicular), it is not a reliable "distinguishing" feature in an acute setting. * **Option D:** While fever is more common in epididymo-orchitis, it is **not a definitive distinguishing feature**. Patients with late-stage testicular torsion can also develop a low-grade fever due to tissue necrosis. ### 3. High-Yield Clinical Pearls for NEET-PG * **Cremasteric Reflex:** This is the **most sensitive** physical exam finding for torsion. It is almost always **absent** in torsion but usually **present** in epididymo-orchitis. * **Golden Period:** For testicular salvage in torsion, surgery should ideally occur within **6 hours**. * **Investigation of Choice:** **Color Doppler Ultrasonography**. It shows decreased/absent blood flow in torsion and increased blood flow (hyperemia) in epididymo-orchitis. * **Age Distribution:** Torsion is most common in adolescents (12–18 years); epididymo-orchitis is more common in sexually active adults or older men with BPH.

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