Urology Practice Questions

Q: Steinstrasse is defined as:

Ureteric obstruction due to stone fragments in the ureter. ### Explanation **Steinstrasse** (German for "Stone Street") is a specific complication that occurs most commonly following **Extracorporeal Shock Wave Lithotripsy (ESWL)** for large renal calculi. **1. Why the Correct Answer is Right:** When a large kidney stone (usually >2 cm) is fragmented by ESWL, the resulting small pieces (gravel) pass into the ureter simultaneously. If these fragments become wedged and accumulate, they form a continuous column of debris that obstructs the ureter. This "street of stones" prevents the normal flow of urine, leading to hydroureteronephrosis and potentially colicky pain or infection. **2. Analysis of Incorrect Options:** * **Option A:** "Staining of stones" is a literal but incorrect interpretation of the prefix "Stein." There is no clinical condition by this name. * **Option B:** "Stones because of stress" is incorrect. While metabolic stress can influence stone formation, Steinstrasse refers to a mechanical arrangement of fragments, not an etiology. * **Option C:** While Steinstrasse is a *complication* of ESWL, it does not define the "failure" of the procedure itself. In many cases, the stone was successfully fragmented; the failure lies in the clearance of those fragments. **3. High-Yield Clinical Pearls for NEET-PG:** * **Incidence:** Most common when treating stones >2 cm without a pre-procedural stent. * **Prevention:** Placement of a **Double-J (DJ) stent** prior to ESWL significantly reduces the risk of Steinstrasse in patients with large stone burdens. * **Management:** * Asymptomatic: Observation (fragments may pass spontaneously). * Symptomatic/Obstructive: Nephrostomy or Ureteroscopy (URS) to clear the "street." * **Imaging:** Classically seen on KUB (Kidney, Ureter, Bladder) X-ray as a linear radio-opaque column in the line of the ureter.

Q: Peyronie's disease affects which organ?

Penis. **Explanation:** **Peyronie’s Disease** is a connective tissue disorder characterized by the formation of fibrous inelastic scar tissue (collagen plaques) within the **Tunica Albuginea** of the **Penis**. This results in a palpable nodule, painful erections, and a characteristic curvature of the penis during erection, which can lead to erectile dysfunction or difficulty with intercourse. **Analysis of Options:** * **Option B (Penis):** This is the correct site. The disease specifically involves the sheath surrounding the corpora cavernosa. * **Option A (Prostate):** Diseases of the prostate typically involve hyperplasia (BPH) or adenocarcinoma, presenting with lower urinary tract symptoms (LUTS), not anatomical curvature. * **Option C (Urinary Bladder):** Bladder pathologies usually involve transitional cell carcinoma or cystitis, affecting storage and voiding. * **Option D (Kidneys):** Renal pathologies involve filtration issues, stones, or tumors (RCC), unrelated to penile fibrous plaques. **High-Yield Clinical Pearls for NEET-PG:** * **Associated Condition:** It is frequently associated with **Dupuytren’s contracture** (fibrosis of the palmar fascia) in about 10-20% of cases. * **Pathophysiology:** Often attributed to repetitive micro-vascular trauma during intercourse in predisposed individuals. * **Clinical Presentation:** Pain, curvature (chordee), and a palpable plaque on the dorsal aspect (most common). * **Management:** * *Medical:* Vitamin E, Potaba, or Intralesional Collagenase (*Clostridium histolyticum*). * *Surgical:* Indicated if the deformity persists >12 months or prevents intercourse. Procedures include **Nesbit’s procedure** (plication of the unaffected side) or plaque excision with grafting.

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

Digital Rectal Examination (DRE) + PSA. **Explanation:** The screening for prostate cancer relies on the principle that combining a biochemical marker with a physical examination significantly increases the **sensitivity** and **positive predictive value (PPV)** compared to using either test alone. 1. **Why Option C is Correct:** * **PSA (Prostate-Specific Antigen):** It is a highly sensitive organ-specific marker but lacks specificity for cancer (it can be elevated in BPH or prostatitis). * **DRE (Digital Rectal Examination):** It can detect tumors in the posterior and lateral aspects of the prostate, even when PSA levels are within the normal range (approximately 25% of men with prostate cancer have a PSA <4 ng/mL). * **Synergy:** Combining DRE + PSA is the gold standard for screening because it captures cases that one modality might miss, achieving the highest sensitivity for early detection. 2. **Why Other Options are Incorrect:** * **Option A (DRE alone):** It is subjective and often misses small or non-palpable (T1 stage) tumors. * **Option B (PSA alone):** While more sensitive than DRE, relying solely on PSA misses cancers in patients with low PSA production. * **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; however, in high-risk patients (positive family history or African American ethnicity), screening should start at **40–45 years**. * **PSA Velocity:** A rise of **>0.75 ng/mL per year** is suspicious, even if the total PSA is 25% suggests BPH. * **Definitive Diagnosis:** Always requires a **TRUS-guided biopsy** (usually 12-core).

Q: A patient presents with complains of sciatica. On radiological examination, there are sclerotic lesions on his skull. Which of the following is most likely to be elevated in this patient?

Prostate specific antigen. **Explanation:** The clinical presentation of **sciatica** (often caused by nerve root compression) combined with **sclerotic (osteoblastic) lesions** on the skull or spine in an elderly male is a classic hallmark of **Metastatic Prostate Cancer**. 1. **Why PSA is correct:** Prostate cancer is the most common malignancy to produce **osteoblastic (bone-forming) metastases**. These lesions appear radiodense or "sclerotic" on X-ray. **Prostate-Specific Antigen (PSA)** is the specific tumor marker used for screening, monitoring, and diagnosing prostate adenocarcinoma. In the context of bony metastasis, PSA levels are typically significantly elevated. 2. **Why other options are incorrect:** * **CEA (Carcinoembryonic Antigen):** Primarily a marker for colorectal carcinoma. While it can be elevated in various cancers, it is not associated with sclerotic bone lesions. * **Alkaline Phosphatase (ALP):** While ALP *would* be elevated in this patient (due to increased osteoblastic activity), the question asks for the "most likely" specific marker. PSA is the definitive marker for the underlying primary malignancy (Prostate CA) causing these specific lesions. (Note: In some exams, if PSA isn't an option, ALP is the next best choice for bone turnover). * **Alpha-1 Antitrypsin:** A protease inhibitor; deficiency leads to emphysema and liver cirrhosis, not sclerotic bone lesions. **Clinical Pearls for NEET-PG:** * **Osteoblastic (Sclerotic) Metastases:** Think Prostate Cancer (Most common), Breast Cancer (can be mixed), or Carcinoid. * **Osteolytic (Lucent) Metastases:** Think Multiple Myeloma, Renal Cell Carcinoma, Lung Cancer, and Thyroid Cancer. * **Acid Phosphatase (Tartrate-resistant):** Historically used for prostate cancer, but now replaced by the more sensitive PSA.

Q: A 20-year-old male presents with a scrotal mass. What is the first investigation to be done?

Clinical evaluation (Palpation and transillumination). **Explanation:** In clinical surgery, the diagnostic sequence always begins with a thorough physical examination. For a scrotal mass, **Clinical Evaluation (Palpation and Transillumination)** is the mandatory first step to differentiate between testicular (solid) and extra-testicular (often cystic) pathologies. * **Why Option A is Correct:** Palpation helps determine if the mass is separate from the testis (like an epididymal cyst) or part of the testis itself (suggestive of malignancy). **Transillumination** is a bedside test that immediately identifies fluid-filled structures like hydroceles. This clinical assessment guides the necessity and urgency of further imaging. * **Why Options B, C, and D are Incorrect:** * **Ultrasound (USG):** While USG is the *investigation of choice* (most accurate) for scrotal masses, it is the *second* step after clinical suspicion is established. * **Biopsy:** This is **strictly contraindicated** in suspected testicular tumors. Scrotal biopsy or aspiration risks "scrotal seeding," where tumor cells spread to the inguinal lymph nodes, altering the lymphatic drainage and worsening the prognosis. * **AFP Level:** This is a tumor marker used for diagnosis and staging of Non-Seminomatous Germ Cell Tumors (NSGCT), but it is performed only after a mass is clinically and radiologically identified. **Clinical Pearls for NEET-PG:** * **Gold Standard/IOC:** Scrotal Ultrasound (High-frequency linear probe). * **Rule of Thumb:** Any firm, non-tender mass within the substance of the testis in a young male is **testicular cancer** until proven otherwise. * **Surgical Approach:** If malignancy is suspected, the definitive procedure is **Radical Inguinal Orchidectomy** (never trans-scrotal).

Q: Whitaker test is done for diagnosing which of the following conditions?

Hydronephrosis. **Explanation:** The **Whitaker test** is a percutaneous pressure-flow study used to differentiate between **obstructive hydronephrosis** and **non-obstructive dilation** (such as a prominent extrarenal pelvis or residual dilation after surgery). **Why Hydronephrosis is Correct:** In cases where imaging (like IVU or Ultrasound) shows a dilated collecting system but cannot definitively confirm a functional obstruction, the Whitaker test provides a definitive diagnosis. It involves placing a needle into the renal pelvis and a catheter into the bladder. Saline is infused into the renal pelvis at a constant rate (10 ml/min). The pressure difference between the renal pelvis and the bladder is measured. A pressure gradient **>22 cm H₂O** confirms a significant mechanical obstruction requiring intervention. **Why Other Options are Incorrect:** * **Renal Carcinoma & Wilms Tumor:** These are solid malignancies. Diagnosis is primarily based on imaging (CT/MRI) and histopathology, not urodynamic pressure studies. * **Renal Tuberculosis:** This is a chronic granulomatous infection. Diagnosis relies on urine microscopy (AFB), culture (Lowenstein-Jensen medium), and imaging showing "putty kidney" or "moth-eaten" calyces. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard:** While the Whitaker test is the "gold standard" for confirming the *presence* of obstruction, it is invasive. * **Non-invasive Alternative:** The **DTPA or MAG3 Diuretic Renogram** (Nuclear scan) is the preferred first-line non-invasive investigation to differentiate obstructive from non-obstructive hydronephrosis. * **Indications:** It is most commonly used today when nuclear scans are equivocal or in patients with significantly impaired renal function where scans are unreliable.

Q: A patient presents with acute severe lower abdominal pain radiating towards the inguinal region, and ultrasonography shows renal stones. Conservative management is indicated when:

The stone is less than 6 mm in size. **Explanation:** The management of urolithiasis depends primarily on the size of the stone, its location, and the presence of complications. **1. Why Option A is Correct:** The likelihood of spontaneous passage of a ureteric stone is inversely proportional to its size. Stones **< 5-6 mm** in diameter have a high probability (approximately 60-80%) of passing spontaneously with conservative management (Medical Expulsive Therapy using Alpha-blockers like Tamsulosin, hydration, and analgesics). Therefore, conservative management is the initial treatment of choice for small, uncomplicated stones. **2. Why the Other Options are Incorrect:** * **Option B (Hydronephrosis and Infection):** This represents "Obstructed Infected Kidney," which is a urological emergency. It requires immediate surgical intervention (stenting or nephrostomy) to prevent pyonephrosis and urosepsis. * **Option C (Congenital Anomalies):** Stones in anomalous kidneys (e.g., Horseshoe kidney, ectopic kidney) often have poor drainage and are less likely to pass spontaneously, usually requiring active intervention. * **Option D (Failure to descend):** If a stone remains impacted in the same location for **4-6 weeks**, the risk of permanent renal damage and stricture formation increases. Conservative management should be abandoned in favor of intervention (URS or ESWL). **Clinical Pearls for NEET-PG:** * **Size Thresholds:** Stones ** 10 mm** (Low chance; usually requires intervention). * **Narrowest point of the ureter:** The **Vesicoureteric Junction (VUJ)** is the most common site for stone impaction. * **Absolute Indications for Surgery:** Intractable pain, persistent obstruction, deteriorating renal function, and infection.

Q: Hutch diverticulum is seen in which structure?

Bladder. **Explanation:** **Hutch diverticulum** is a congenital para-ureteral diverticulum of the **urinary bladder**. It occurs due to a structural weakness in the muscular wall of the bladder (detrusor muscle) at the point where the ureter penetrates the bladder wall (the ureterovesical junction). Because the muscle layer is deficient in this area, the bladder mucosa herniates outward, forming a diverticulum. * **Why Option A is correct:** The diverticulum is specifically located at the hiatus where the ureter enters the bladder. It is clinically significant because it can distort the intramural course of the ureter, leading to the loss of the "anti-reflux" mechanism, which frequently results in **Vesicoureteral Reflux (VUR)** and recurrent urinary tract infections. * **Why Options B, C, and D are incorrect:** While the ureter (B) is anatomically adjacent, the diverticulum is a herniation of the bladder wall itself. Duodenal diverticula (C) are common but are usually acquired and related to mesenteric borders. Caecal diverticula (D) are rare and unrelated to the embryological defects seen in the urinary tract. **High-Yield Clinical Pearls for NEET-PG:** * **Association:** Hutch diverticulum is strongly associated with **Vesicoureteral Reflux (VUR)**. * **Diagnosis:** It is best visualized during the filling phase of a **Voiding Cystourethrogram (VCUG)**. * **Acquired vs. Congenital:** Unlike acquired bladder diverticula (which are usually multiple and caused by bladder outlet obstruction like BPH), a Hutch diverticulum is typically **congenital and solitary**. * **Surgical Management:** If symptomatic or causing high-grade reflux, it is treated via diverticulectomy and ureteral reimplantation.

Q: Prostate cancer most commonly occurs in which zone of the gland?

Peripheral zone. **Explanation:** The prostate gland is divided into distinct anatomical zones according to **McNeal’s classification**. Understanding these zones is crucial for differentiating between common prostatic pathologies. **1. Why Peripheral Zone (PZ) is correct:** Approximately **70–80% of prostatic adenocarcinomas** originate in the peripheral zone. This zone constitutes the bulk of the glandular tissue and is located posteriorly, surrounding the distal urethra. Because of its posterior location, tumors in this zone are easily palpable during a **Digital Rectal Examination (DRE)**. Furthermore, cancers here often remain asymptomatic until advanced stages because they are distant from the urethra. **2. Why other options are incorrect:** * **Transitional Zone (TZ):** This zone surrounds the proximal urethra. It is the primary site for **Benign Prostatic Hyperplasia (BPH)**. Only about 10–20% of prostate cancers arise here. * **Central Zone (CZ):** This zone surrounds the ejaculatory ducts. It is the least common site for malignancy (approx. 5–10%) but tends to host more aggressive tumors. * **Anterior Portion (Anterior Fibromuscular Stroma):** This area is non-glandular, consisting primarily of muscle and fibrous tissue; therefore, it rarely gives rise to adenocarcinomas. **Clinical Pearls for NEET-PG:** * **Most common site for BPH:** Transitional Zone. * **Most common site for Prostate Cancer:** Peripheral Zone. * **Best Screening Tool:** Combination of DRE and Serum PSA. * **Gold Standard Diagnosis:** TRUS-guided (Transrectal Ultrasound) biopsy. * **Metastasis:** Prostate cancer characteristically spreads to the bone (lumbar spine) via the **Batson venous plexus**, typically presenting as **osteoblastic (sclerotic) lesions**.

Question 1

Steinstrasse is defined as:

Accepted Answer

Ureteric obstruction due to stone fragments in the ureter

Answer

Staining of stones

Answer

Stones because of stress

Answer

Failure of extracorporeal shock wave lithotripsy (ESWL)

Question 2

Peyronie's disease affects which organ?

Accepted Answer

Penis

Answer

Prostate

Answer

Urinary bladder

Answer

Kidneys

Question 3

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

Accepted Answer

Digital Rectal Examination (DRE) + PSA

Answer

Digital Rectal Examination (DRE)

Answer

Prostate-Specific Antigen (PSA)

Answer

Endorectal Coil MRI with T1W and T2W images

Question 4

A 35-year-old male presents to a health clinic with fever, difficulty in urination, and associated pain in the groin. On digital rectal examination, extreme tenderness is felt on the anterior aspect. Laboratory examination of urine revealed leucocytosis and findings consistent with bacterial infection. What is the most likely diagnosis for this condition?

Accepted Answer

Prostatitis

Answer

Pyelonephritis

Answer

Urinary tract infection

Answer

Benign prostatic hyperplasia

Question 5

A patient presents with complains of sciatica. On radiological examination, there are sclerotic lesions on his skull. Which of the following is most likely to be elevated in this patient?

Accepted Answer

Prostate specific antigen

Answer

CEA

Answer

Alkaline phosphatase

Answer

Alpha 1 antitrypsin

Question 6

A 20-year-old male presents with a scrotal mass. What is the first investigation to be done?

Accepted Answer

Clinical evaluation (Palpation and transillumination)

Answer

Ultrasound (USG)

Answer

Biopsy

Answer

Alpha-fetoprotein (AFP) level

Question 7

Whitaker test is done for diagnosing which of the following conditions?

Accepted Answer

Hydronephrosis

Answer

Renal carcinoma

Answer

Renal tuberculosis

Answer

Wilms tumor

Question 8

A patient presents with acute severe lower abdominal pain radiating towards the inguinal region, and ultrasonography shows renal stones. Conservative management is indicated when:

Accepted Answer

The stone is less than 6 mm in size

Answer

Hydronephrosis and infection are present

Answer

Associated congenital anomalies of the kidney are present

Answer

The stone does not descend after 2 weeks of follow-up

Question 9

Hutch diverticulum is seen in which structure?

Accepted Answer

Bladder

Answer

Ureter

Answer

Duodenum

Answer

Caecum

Question 10

Prostate cancer most commonly occurs in which zone of the gland?

Accepted Answer

Peripheral zone

Answer

Transitional zone

Answer

Central zone

Answer

Anterior portion

Urology — MCQs

Urology — MCQs

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