Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 281: A 12-year-old boy presents with acute onset of painful scrotal swelling. What is the immediate management?

A. Perform Doppler ultrasound (Correct Answer)
B. Administer analgesics
C. Prescribe bed rest
D. Initiate antibiotics

Explanation: **Explanation:** The clinical presentation of acute onset painful scrotal swelling in a 12-year-old boy must be treated as **Testicular Torsion** until proven otherwise. Testicular torsion is a surgical emergency where the spermatic cord twists, leading to ischemia and potential necrosis of the testis. **Why Option A is Correct:** **Color Doppler Ultrasound** is the gold standard initial investigation for an acute scrotum. It has high sensitivity and specificity to assess blood flow. A finding of absent or decreased flow confirms torsion, while increased flow suggests inflammatory conditions like epididymo-orchitis. In a clinical setting, if Doppler is unavailable and suspicion is high, immediate surgical exploration is indicated. **Why Other Options are Incorrect:** * **B & C (Analgesics/Bed Rest):** These are supportive measures but do not address the underlying mechanical obstruction. Delaying diagnosis to provide symptomatic relief increases the risk of testicular loss (the "golden period" for salvage is within 6 hours). * **D (Antibiotics):** These are used for epididymo-orchitis. While epididymo-orchitis also causes painful swelling, it is more common in post-pubertal males and usually presents with fever and pyuria. Treating empirically with antibiotics without ruling out torsion can lead to testicular gangrene. **High-Yield Clinical Pearls for NEET-PG:** * **Golden Period:** Testicular salvage rate is ~100% if detorsion occurs within 6 hours, dropping to <10% after 24 hours. * **Prehn’s Sign:** Elevation of the scrotum relieves pain in epididymitis but **not** in torsion (Negative Prehn's sign). * **Cremasteric Reflex:** Usually **absent** in testicular torsion; its presence makes torsion unlikely. * **Deformity:** Torsion is often associated with a "Bell-clapper deformity" (high-riding, horizontal testis).

Question 282: A 65-year-old male presents with a lump on the lower back, hematuria, weight loss, and night sweats. Investigations reveal an 8 cm renal cell carcinoma involving abdominal lymph nodes, but no distant metastasis. What is the most appropriate management for this patient?

A. Radiation followed by nephrectomy
B. Chemotherapy
C. Radiation
D. Radical nephrectomy (Correct Answer)

Explanation: ### Explanation **Correct Option: D. Radical Nephrectomy** The patient presents with the classic triad of Renal Cell Carcinoma (RCC)—flank mass, hematuria, and weight loss—along with constitutional symptoms. The tumor is 8 cm (Stage T3a or higher depending on invasion) with regional lymph node involvement but **no distant metastasis**. For **localized or locally advanced RCC (Stage I, II, and III)**, the gold standard and definitive treatment is **Radical Nephrectomy**. Unlike many other solid tumors, RCC is notoriously **resistant to chemotherapy and radiation**. Therefore, surgical excision of the kidney, Gerota’s fascia, and regional lymph nodes remains the primary curative modality. Even in the presence of nodal involvement (Stage III), surgery offers the best chance for survival and symptom control. **Why other options are incorrect:** * **A & C (Radiation):** RCC is a **radioresistant** tumor. Radiation is never the primary treatment; it is reserved only for palliation of painful bone metastases or brain involvement. * **B (Chemotherapy):** RCC is highly **chemoresistant** due to the high expression of the MDR-1 (multidrug resistance) gene. If systemic therapy is needed (Stage IV), targeted immunotherapy (e.g., Sunitinib, Pembrolizumab) is used, not conventional chemotherapy. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Hematuria, flank pain, and palpable mass (seen in only 10% of cases, usually signifies advanced disease). * **Most common histological type:** Clear cell RCC (arises from Proximal Convoluted Tubule). * **Staging Tip:** T1 is ≤7 cm; T2 is >7 cm (limited to kidney). This patient’s 8 cm tumor is at least T2. * **Robson’s Classification:** Historically used for RCC staging, though TNM is now preferred. * **Paraneoplastic Syndromes:** RCC is the "Internist's Tumor" (can cause polycythemia, hypercalcemia, and hypertension).

Question 283: Thyrotoxic myopathy most commonly affects which group of muscles?

A. Muscles of the neck
B. Proximal limb muscles (Correct Answer)
C. Distal limb muscles
D. Muscles of the tongue

Explanation: **Explanation:** Thyrotoxic myopathy is a common neuromuscular complication of hyperthyroidism, occurring in up to 60-80% of patients with untreated thyrotoxicosis. **Why Proximal Limb Muscles are Correct:** The condition characteristically presents as **chronic thyrotoxic myopathy**, which primarily involves **proximal muscle weakness and wasting**. The pelvic girdle (hips/thighs) is usually affected more severely and earlier than the shoulder girdle. The underlying pathophysiology involves increased protein catabolism, altered carbohydrate metabolism, and mitochondrial dysfunction induced by excess thyroid hormones (T3/T4), which preferentially affects the large, metabolically active proximal muscle groups. **Analysis of Incorrect Options:** * **A. Muscles of the neck:** While neck flexors can occasionally be weak, they are not the "most common" site compared to the limbs. * **C. Distal limb muscles:** Distal involvement (hands/feet) is rare in thyrotoxicosis. If distal weakness is prominent, clinicians should investigate other pathologies like motor neuron disease or peripheral neuropathy. * **D. Muscles of the tongue:** Bulbar involvement (tongue, swallowing) is rare and usually only seen in severe, acute cases or when associated with Myasthenia Gravis. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Sign:** Patients often report difficulty climbing stairs or rising from a chair (Gower’s-like presentation). * **Reflexes:** Unlike most myopathies, deep tendon reflexes (DTRs) are typically **preserved or even brisk** in thyrotoxic myopathy. * **Association:** Hyperthyroidism is strongly associated with **Myasthenia Gravis** (1% of thyrotoxic patients have MG) and **Hypokalemic Periodic Paralysis** (especially in Asian males). * **CK Levels:** Interestingly, Serum Creatine Kinase (CK) levels are usually **normal** in thyrotoxic myopathy, despite significant wasting.

Question 284: Which fruit juice helps in preventing urinary tract infections (UTI)?

A. Cranberry (Correct Answer)
B. Raspberry
C. Orange
D. Grape

Explanation: **Explanation:** **Cranberry juice (Option A)** is the correct answer due to its unique biochemical properties that inhibit bacterial colonization. The primary mechanism involves **Proanthocyanidins (PACs)**, specifically Type-A PACs. These compounds prevent *Escherichia coli* (the most common uropathogen) from adhering to the uroepithelial cells. They specifically inhibit the **P-fimbriae** (adhesins) of the bacteria, preventing them from "sticking" to the bladder wall, thereby allowing the bacteria to be flushed out during micturition. Additionally, cranberry juice contains **Quinic acid**, which is metabolized into hippuric acid, slightly acidifying the urine and creating an unfavorable environment for bacterial growth. **Why other options are incorrect:** * **Raspberry (Option B):** While raspberries contain antioxidants, they lack the specific Type-A proanthocyanidins required to inhibit uropathogenic bacterial adhesion. * **Orange (Option C):** Citrus juices like orange juice are rich in Vitamin C (ascorbic acid), which can acidify urine. However, they do not possess anti-adhesive properties and can sometimes irritate the bladder lining in patients with interstitial cystitis. * **Grape (Option D):** Grapes contain polyphenols, but clinical evidence does not support their efficacy in preventing UTIs compared to the targeted action of cranberry compounds. **High-Yield Clinical Pearls for NEET-PG:** * **Prophylaxis vs. Treatment:** Cranberry juice is effective for **prophylaxis** (prevention) of recurrent UTIs, not for the treatment of an active infection. * **Target Organism:** It is most effective against **P-fimbriated *E. coli***. * **Drug Interaction:** Patients on **Warfarin** should be cautious, as cranberry juice can potentially increase the INR and risk of bleeding by inhibiting cytochrome P450 enzymes. * **Other Preventive Measures:** Increased fluid intake, post-coital voiding, and topical estrogen (in postmenopausal women) are other high-yield preventive strategies for recurrent UTIs.

Question 285: A 50-year-old male with a positive family history of prostate cancer presents for screening. What is the most sensitive screening test to detect prostate cancer?

A. Digital Rectal Examination (DRE)
B. Prostate-Specific Antigen (PSA) test
C. Digital Rectal Examination (DRE) combined with PSA test (Correct Answer)
D. Endorectal Coil MRI with T1W and T2W images

Explanation: **Explanation:** The screening for prostate cancer relies on the principle of maximizing sensitivity to detect the disease at an early, treatable stage. **Why Option C is correct:** The combination of **Digital Rectal Examination (DRE) and Prostate-Specific Antigen (PSA)** is the most sensitive screening approach. While PSA is a highly sensitive organ-specific marker, it can be elevated in benign conditions (BPH, prostatitis). Conversely, some aggressive cancers do not significantly raise PSA levels but can be detected as palpable nodules on DRE. Using both tests together compensates for the limitations of each, significantly increasing the **Positive Predictive Value (PPV)** and overall detection rate compared to using either test alone. **Why other options are incorrect:** * **Option A (DRE alone):** Has low sensitivity as it only detects tumors in the posterior and lateral aspects of the gland that are large enough to be palpable. * **Option B (PSA alone):** While more sensitive than DRE, it lacks specificity and may miss small, palpable nodules that are not yet producing high systemic PSA levels. * **Option D (MRI):** While Multiparametric MRI (mpMRI) is excellent for localization and staging (PI-RADS scoring), it is not used as a primary screening tool due to high costs and lack of accessibility. **High-Yield Clinical Pearls for NEET-PG:** * **Age to start screening:** Usually 50 years for average risk; 45 years for high risk (positive family history or African American race). * **PSA Cut-off:** Generally >4 ng/mL is considered suspicious, but age-specific PSA ranges are more accurate. * **Free/Total PSA Ratio:** A ratio <10% suggests a higher risk of malignancy. * **Definitive Diagnosis:** Transrectal Ultrasound (TRUS) guided biopsy (usually 12-core biopsy) remains the gold standard for diagnosis.

Question 286: Ectopic ureter is most commonly associated with which of the following?

A. Oliguria
B. Hydronephrosis (Correct Answer)
C. Bilateral hydroureter
D. All of the above

Explanation: **Explanation:** An **ectopic ureter** occurs when the ureteric bud fails to migrate correctly, resulting in the ureter opening at a site other than the trigone of the bladder. **Why Hydronephrosis is the Correct Answer:** The most common complication associated with an ectopic ureter is **hydronephrosis** (and hydroureter). This occurs due to two primary mechanisms: 1. **Obstruction:** Ectopic orifices are frequently stenotic or located in areas (like the urethra or reproductive tracts) that do not allow for low-pressure drainage, leading to functional or mechanical obstruction. 2. **Vesicoureteral Reflux (VUR):** Because the normal "anti-reflux" valve mechanism of the intramural ureter is absent in ectopic insertions, urine often flows retrograde, causing dilation of the renal pelvis. **Analysis of Incorrect Options:** * **Oliguria:** This refers to low urine output. Ectopic ureter is a structural anomaly typically affecting one kidney (or one pole of a duplex system). The contralateral kidney usually functions normally, maintaining total urine output; therefore, oliguria is not a feature. * **Bilateral Hydroureter:** While ectopia can be bilateral, it is most commonly **unilateral** (often associated with a duplex collecting system, specifically the upper pole). Bilateral involvement is rare and not the "most common" association. **NEET-PG High-Yield Pearls:** * **Weigert-Meyer Law:** In a duplex system, the ureter from the **upper pole** is ectopic and inserts **medially and inferiorly** to the lower pole ureter. The upper pole ureter is prone to **obstruction**, while the lower pole is prone to **reflux**. * **Clinical Presentation:** In females, the classic presentation is **constant dribbling of urine** despite a normal voiding pattern (because the ureter opens distal to the external sphincter). In males, it never causes incontinence because the ectopic ureter always enters the urogenital system **proximal** to the external sphincter. * **Most common site in females:** Vestibule (35%), followed by the vagina and uterus. * **Most common site in males:** Prostatic urethra (50%), followed by seminal vesicles.

Question 287: Which of the following statements is true regarding testicular tumors?

A. Embryonal cell carcinomas occur in approximately 95% of cases.
B. Testicular tumors are bilateral in up to 10% of cases.
C. Teratomas are more common than seminomas.
D. None of the above statements are true. (Correct Answer)

Explanation: ### Explanation The correct answer is **D (None of the above statements are true)** because the provided options misrepresent the epidemiological and pathological characteristics of testicular germ cell tumors (GCTs). **1. Why Option A is incorrect:** Embryonal cell carcinoma is a subtype of Non-Seminomatous Germ Cell Tumors (NSGCT). While common in mixed GCTs, it does not occur in 95% of cases. In reality, **Seminomas** are the most common single-cell type testicular tumor, accounting for approximately 40–50% of all cases. **2. Why Option B is incorrect:** Testicular tumors are predominantly unilateral. Bilateral involvement is rare, occurring in only **1–3%** of cases (not 10%). When bilateral tumors occur, they may be synchronous (occurring at the same time) or metachronous (occurring at different times), with chronic lymphatic leukemia/lymphoma being the most common cause of bilateral testicular masses in older men. **3. Why Option C is incorrect:** Seminomas are significantly more common than pure teratomas in adults. Teratomas are more frequently seen in the pediatric age group or as a component of mixed GCTs in adults. --- ### High-Yield Clinical Pearls for NEET-PG: * **Most Common Type:** Germ cell tumors (GCTs) account for 95% of all testicular cancers. * **Age Distribution:** Seminomas typically peak in the 4th decade (30–40 years), while NSGCTs peak earlier in the 3rd decade (20–30 years). * **Tumor Markers:** * **AFP (Alpha-fetoprotein):** Never elevated in pure seminomas. If AFP is high, it is treated as an NSGCT. * **hCG:** Elevated in all choriocarcinomas and 10–15% of seminomas. * **Lymphatic Spread:** The primary landing site for testicular tumors is the **retroperitoneal lymph nodes** (Para-aortic), except if the scrotum is involved, where it spreads to inguinal nodes. * **Treatment:** Seminomas are highly **radiosensitive**, whereas NSGCTs are generally radioresistant and managed with surgery (Radical Orchidectomy) and chemotherapy (BEP regimen).

Question 288: What is the treatment of choice for a 4cm retroperitoneal lymph node mass in a patient with non-seminomatous germ cell tumor of the testis?

A. Radical radiotherapy alone
B. High orchidectomy plus retroperitoneal lymph node dissection (RPLND) (Correct Answer)
C. Retroperitoneal lymph node dissection (RPLND) alone
D. High orchidectomy alone

Explanation: ### Explanation The management of Non-Seminomatous Germ Cell Tumors (NSGCT) follows a structured surgical and oncological protocol. The primary treatment for any suspected testicular malignancy is a **High Inguinal Orchidectomy**, which serves both a diagnostic (histopathology) and therapeutic purpose. In NSGCT, the presence of a **4 cm retroperitoneal lymph node (RPLN) mass** signifies Stage IIB disease. Unlike seminomas, NSGCTs are relatively **radioresistant**. Therefore, the management of the retroperitoneal nodes requires surgical intervention. **Retroperitoneal Lymph Node Dissection (RPLND)** is the gold standard for managing residual or primary nodal masses in NSGCT to ensure complete clearance of the tumor and any potential teratomatous elements, which do not respond to chemotherapy. #### Why other options are incorrect: * **Option A:** Radiotherapy is the treatment of choice for Seminomas (which are radiosensitive) but is ineffective for NSGCT. * **Option C:** RPLND alone is insufficient because the primary tumor (the testis) must be removed via high orchidectomy to prevent local recurrence and confirm the diagnosis. * **Option D:** High orchidectomy alone is only appropriate for Stage IA (limited to the testis). A 4 cm node indicates metastatic spread that must be addressed surgically or via chemotherapy. #### High-Yield Clinical Pearls for NEET-PG: * **Route of Surgery:** Always perform a **High Inguinal Orchidectomy**, never trans-scrotal (to avoid altering lymphatic drainage to inguinal nodes). * **Lymphatic Spread:** Testicular tumors typically spread to **Para-aortic nodes** (at the level of L2), except for choriocarcinoma, which spreads hematogenously. * **Tumor Markers:** NSGCT is associated with elevated **AFP** and **beta-hCG**, whereas pure seminomas never secrete AFP. * **Post-Chemo RPLND:** In NSGCT, if a residual mass >1 cm remains after chemotherapy, RPLND is mandatory to rule out residual viable tumor or "Growing Teratoma Syndrome."

Question 289: Zuska's syndrome, common in smokers, causes which of the following conditions?

A. Acute mastitis
B. Chronic areolar abscess (Correct Answer)
C. Fibroadenosis
D. Acute abscess formation

Explanation: **Explanation:** **Zuska’s Syndrome** (also known as Zuska’s disease or Smoker’s Mastitis) is a condition characterized by a triad of **retroareolar abscess, chronic discharging fistula, and nipple retraction.** 1. **Why Option B is Correct:** The underlying pathophysiology involves **squamous metaplasia of the lactiferous ducts**. In smokers, the toxic effects of cigarette smoke lead to the replacement of the normal cuboidal epithelium of the ducts with squamous cells. These cells produce keratin, which plugs the ducts, leading to stasis, infection, and the formation of a **chronic recurrent areolar abscess**. Because the underlying cause (metaplasia) persists, these abscesses frequently recur and form fistulous tracts (fistula-at-the-nipple). 2. **Why Other Options are Incorrect:** * **Option A & D:** While Zuska’s involves an abscess, it is specifically a **chronic, recurrent** condition related to ductal metaplasia. "Acute mastitis" and "Acute abscess" usually refer to lactational infections caused by *Staphylococcus aureus* entering through nipple cracks, which is a different clinical entity. * **Option C:** Fibroadenosis (ANDI) refers to benign cyclical breast pain and lumpiness related to hormonal changes, not an inflammatory or infectious process involving squamous metaplasia. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factor:** Smoking is the strongest independent risk factor (strong association with squamous metaplasia). * **Management:** Simple incision and drainage often lead to recurrence. The definitive treatment is the **Hadfield’s Procedure** (Total excision of the major lactiferous ducts). * **Differential Diagnosis:** Must be distinguished from periductal mastitis and mammary duct ectasia.

Question 290: All of the following are true about testicular dysgenesis syndrome EXCEPT:

A. Cryptorchidism
B. Epispadias (Correct Answer)
C. Hypospadias
D. Poor sperm motility

Explanation: **Testicular Dysgenesis Syndrome (TDS)** is a clinical concept suggesting that several male reproductive disorders share a common developmental origin during fetal life, often linked to environmental endocrine disruptors and genetic factors. ### **Why Epispadias is the Correct Answer** **Epispadias** is a congenital malformation where the urethra opens on the dorsal (upper) surface of the penis. It is primarily a defect in the migration of the cloacal membrane and is frequently associated with **bladder exstrophy**. It is **not** part of the TDS spectrum. ### **Analysis of Incorrect Options (Components of TDS)** The TDS hypothesis includes four main clinical manifestations resulting from impaired Leydig and Sertoli cell function during embryogenesis: * **Cryptorchidism (Option A):** Failure of testicular descent is a hallmark of TDS due to hormonal imbalances (low testosterone/INSL3). * **Hypospadias (Option C):** An opening of the urethra on the ventral (underside) of the penis, resulting from incomplete fusion of urethral folds under insufficient androgenic stimulation. * **Poor Sperm Motility/Infertility (Option D):** TDS leads to impaired spermatogenesis, manifested as low sperm count and poor motility in adulthood. * **Testicular Germ Cell Tumors (TGCT):** Though not listed in the options, this is the fourth major component of the syndrome. ### **High-Yield Clinical Pearls for NEET-PG** * **The TDS Tetrad:** 1. Cryptorchidism, 2. Hypospadias, 3. Reduced Semen Quality, 4. Testicular Cancer. * **Pathogenesis:** It is thought to be caused by a "window of susceptibility" in the first trimester where androgen action is disrupted. * **Hypospadias vs. Epispadias:** Remember **"Ventral = Hypospadias (TDS)"** and **"Dorsal = Epispadias (Exstrophy complex)."** * **Most common site of Hypospadias:** Glanular/Distal (most common); **Most common site of Cryptorchidism:** Inguinal canal.

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Urology — MCQs

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