Urology Practice Questions

Q: On exertion, in which condition does the urine stream increase?

Urethral stricture. ### Explanation In **Urethral Stricture**, the pathology is a fixed, anatomical narrowing of the urethral lumen due to scarring (fibrosis). When a patient with a stricture exerts themselves (e.g., using the Valsalva maneuver or abdominal straining), the intra-abdominal pressure increases. This pressure is transmitted directly to the bladder, increasing the intravesical pressure. Because the stricture is a **passive, rigid resistance**, the increased driving force from the bladder successfully pushes more urine through the narrow opening, thereby **increasing the force and flow of the urine stream**. **Why the other options are incorrect:** * **Prostate Enlargement (BPH):** This is a "dynamic" obstruction. Straining increases pressure on the pelvic floor, which can further compress the prostatic urethra or cause the enlarged median lobe to act as a ball-valve, often worsening the obstruction rather than improving the stream. * **Marion’s Disease (Bladder Neck Obstruction):** This involves hypertrophy or lack of relaxation of the internal sphincter. Like BPH, it acts as a functional/dynamic valve where straining does not significantly improve the flow and may worsen the dysfunction. * **Posterior Urethral Valves (PUV):** These are mucosal folds in the distal prostatic urethra that act as **one-way valves**. Increased abdominal pressure pushes the valve leaflets together, further sealing the lumen and worsening the obstruction. ### Clinical Pearls for NEET-PG: * **Urethral Stricture:** Most common site is the **bulbar urethra** (post-traumatic or idiopathic). The gold standard investigation is **Retrograde Urethrogram (RGU)**. * **Flow Rate:** A peak flow rate (**Qmax**) of **<10 mL/s** is highly suggestive of significant outflow obstruction. * **Key Distinction:** If the stream improves with straining, think **Stricture**; if it worsens or remains poor despite straining, think **Prostatic or Valve obstruction**.

Q: An elderly male presents with one episode of gross hematuria. Which of the following investigations is NOT recommended for investigating this patient?

Urine tumor markers. The primary goal in evaluating an elderly patient with gross hematuria is to rule out malignancy, specifically **Urothelial Carcinoma** (Bladder Cancer) or **Renal Cell Carcinoma**. [1] **Why Option C is the Correct Answer (NOT recommended):** While several urine tumor markers (e.g., NMP22, BTA stat) exist, they are **not recommended** for the initial diagnostic workup of hematuria according to AUA and EAU guidelines. They lack the necessary sensitivity and specificity to replace gold-standard investigations and often yield false positives in the presence of stones, infection, or inflammation. **Why the other options are wrong (Recommended investigations):** * **Cystoscopy (A):** This is the gold standard for evaluating the lower urinary tract. It is mandatory in patients >35 years with gross hematuria to visualize bladder tumors that imaging might miss. * **Urine microscopy for malignant cells (B):** Urine cytology has high specificity for detecting high-grade urothelial carcinoma and CIS (Carcinoma in situ). [1] * **Intravenous Pyelogram (D):** Historically, IVP was the standard for imaging the upper tract (ureters and renal pelvis). While largely replaced by **CT Urography** in modern practice, it remains a valid classical investigation for upper tract morphology in exams. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Any painless gross hematuria in an elderly patient is **Bladder Cancer** until proven otherwise. [1] * **Initial Investigation of Choice:** Ultrasonography (KUB) is often the first step, but **CT Urography** is the most sensitive imaging for the upper tract. [2] * **Most common cause of hematuria (overall):** Urinary Tract Infection (UTI). * **Most common cause of hematuria (elderly):** Bladder malignancy or BPH.

Q: What is the drug of choice for surgically unresectable renal cell carcinoma?

Sunitinib. ### Explanation **Correct Answer: B. Sunitinib** **Medical Concept:** Renal Cell Carcinoma (RCC) is a highly vascular tumor characterized by the overexpression of **Vascular Endothelial Growth Factor (VEGF)**, often due to mutations in the *VHL* (von Hippel-Lindau) gene. For metastatic or surgically unresectable RCC, traditional chemotherapy and radiotherapy are largely ineffective. The mainstay of treatment is **Targeted Therapy**. **Sunitinib** is a multi-targeted tyrosine kinase inhibitor (TKI) that inhibits VEGF receptors (VEGFR) and Platelet-Derived Growth Factor receptors (PDGFR). It has historically been the first-line drug of choice for advanced/metastatic clear cell RCC because it inhibits the angiogenesis that drives tumor growth. **Analysis of Incorrect Options:** * **A. Sorafenib:** While also a TKI used in RCC, it is generally considered a second-line agent or used when Sunitinib is not tolerated. It is more commonly associated with Hepatocellular Carcinoma (HCC). * **C. Imatinib:** This TKI specifically targets BCR-ABL, c-KIT, and PDGFR. It is the drug of choice for **Chronic Myeloid Leukemia (CML)** and **Gastrointestinal Stromal Tumors (GIST)**, not RCC. * **D. Cetuximab:** This is a monoclonal antibody against **EGFR**. It is used in Colorectal Cancer and Head and Neck Squamous Cell Carcinoma, but has no role in the management of RCC. **High-Yield Clinical Pearls for NEET-PG:** * **Most common histological type:** Clear cell RCC (80%). * **First-line for Metastatic RCC:** Sunitinib or Pazopanib. (Note: Recent guidelines also include immunotherapy combinations like Axitinib + Pembrolizumab). * **Common Side Effect of Sunitinib:** Hand-foot syndrome, hypertension, and fatigue. * **Interleukin-2 (IL-2):** Previously used as immunotherapy but now largely replaced due to high toxicity. * **Temsirolimus:** An mTOR inhibitor used specifically for "poor prognosis" metastatic RCC.

Q: A male patient presents with acute scrotal pain. Which investigation is most effective in differentiating between testicular torsion and epididymo-orchitis?

Color Doppler. **Explanation:** The clinical differentiation between **testicular torsion** (a surgical emergency) and **epididymo-orchitis** (an inflammatory condition) is critical. The gold standard imaging modality for this purpose is **Color Doppler Ultrasonography (CDUS)**. 1. **Why Color Doppler is Correct:** The underlying pathophysiology differs significantly in terms of vascularity. In **testicular torsion**, the twisting of the spermatic cord leads to ischemia, appearing as **absent or decreased blood flow** on Doppler. In contrast, **epididymo-orchitis** is an inflammatory process characterized by hyperemia, showing **increased blood flow** to the testis and epididymis. CDUS has a high sensitivity (82-100%) and specificity (88-100%) for this distinction. 2. **Why other options are incorrect:** * **Angel sign:** This refers to the horizontal lie of the contralateral testis in a patient with torsion. While a useful clinical observation, it is not a definitive "investigation." * **Prehn sign:** This is a physical exam finding where pain is relieved by elevating the scrotum (suggestive of epididymitis) but not in torsion. However, it is notoriously **unreliable** and cannot be used to rule out torsion. * **MRI:** While highly accurate, MRI is time-consuming, expensive, and not readily available in emergency settings. Since "time is muscle" in torsion (6-hour golden window), MRI is not the investigation of choice. **Clinical Pearls for NEET-PG:** * **Golden Window:** Testicular salvage rates are >90% if detorsion occurs within 6 hours, dropping to <10% after 24 hours. * **Management:** If clinical suspicion for torsion is very high, do not delay surgery for imaging; proceed directly to **emergency scrotal exploration**. * **Radionuclide Scan:** Historically used to show "cold spots" in torsion, but largely replaced by Doppler due to availability.

Q: An 85-year-old man underwent transurethral resection of the prostate. Histological examination of his specimen showed T1a stage adenocarcinoma. What is the appropriate management?

No further treatment. **Explanation:** The management of prostate cancer is determined by the stage, grade, and the patient's life expectancy. In this scenario, the patient has **Stage T1a adenocarcinoma** and is **85 years old**. **1. Why "No further treatment" is correct:** * **Stage T1a Definition:** This is an incidental histological finding where the tumor involves **≤ 5% of the resected tissue** (usually following a TURP for presumed BPH). * **Prognosis & Age:** T1a tumors are typically low-grade and slow-growing. In an 85-year-old patient, the life expectancy is likely less than 10 years. Since the risk of disease progression is extremely low and the patient is more likely to die *with* the cancer than *of* it, the standard of care is **watchful waiting** or no further treatment. **2. Why other options are incorrect:** * **Radical Surgery (Radical Prostatectomy):** This is generally reserved for patients with a life expectancy of >10 years and higher-stage localized disease (T1b, T2). In an 85-year-old, the morbidity of surgery outweighs any potential survival benefit. * **Endocrine/Hormone Therapy:** These are synonymous and involve Androgen Deprivation Therapy (ADT). This is indicated for metastatic disease (Stage N+ or M+) or as an adjunct to radiotherapy in high-risk localized cases. It is not indicated for incidental T1a disease. **Clinical Pearls for NEET-PG:** * **T1a:** Incidental finding in ≤ 5% of tissue. * **T1b:** Incidental finding in > 5% of tissue. * **T1c:** Identified by needle biopsy (usually due to elevated PSA). * **Management Rule:** For T1a, if the patient is elderly/comorbid, observe. If the patient is young (life expectancy >10 years), consider follow-up or radical treatment. * **Most common site of Prostate Cancer:** Peripheral zone (unlike BPH, which occurs in the Transition zone).

Q: What is the most common cause of urethral stricture?

Trauma. **Explanation:** Urethral stricture refers to the narrowing of the urethral lumen due to fibrosis and scarring of the urethral mucosa and surrounding corpus spongiosum (spongiofibrosis). **1. Why Trauma is correct:** In modern clinical practice, **trauma** is the most common cause of urethral strictures globally. This includes: * **Iatrogenic Trauma (Most Common Subtype):** This includes injuries from urethral catheterization, transurethral surgeries (like TURP), and cystoscopy. * **External Trauma:** Straddle injuries (leading to bulbar urethral stricture) and pelvic fractures (leading to membranous urethral distractions). **2. Analysis of Incorrect Options:** * **Infection (Option B):** Historically, gonococcal urethritis was the leading cause. However, with the advent of effective antibiotics, inflammatory strictures have significantly decreased in incidence. * **Congenital (Option C):** These are rare and usually present as posterior urethral valves rather than true fibrous strictures. * **Post-endoscopy (Option D):** While a very common cause, it is technically a subset of **Iatrogenic Trauma**. In MCQ exams, "Trauma" is the broader, preferred umbrella term. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of stricture:** Bulbar urethra (especially in iatrogenic and straddle injuries). * **Gold Standard Investigation:** Retrograde Urethrogram (RUG) combined with Voiding Cystourethrogram (VCU) to define the length and location. * **Management:** * Short strictures (<2 cm): Direct Vision Internal Urethrotomy (DVIU) or dilatation. * Long/Recurrent strictures: Urethroplasty (e.g., BMG - Buccal Mucosal Graft urethroplasty). * **Pelvic Fracture:** Most commonly associated with injury to the **membranous urethra** (Posterior urethra).

Q: Which of the following conditions is NOT associated with an elevation in prostatic specific antigen?

Prostatic intraepithelial neoplasia. ### Explanation **Correct Option: C. Prostatic intraepithelial neoplasia (PIN)** The underlying medical concept is that **Prostate-Specific Antigen (PSA)** is a protease produced by the ductal and acinar epithelium of the prostate. Its elevation in the serum occurs when there is a disruption of the **prostatic-blood barrier** (basal cell layer and basement membrane). In **Prostatic Intraepithelial Neoplasia (PIN)**, particularly High-Grade PIN, there is cellular atypia within the ducts, but the **basal cell layer remains intact**. Because the architectural integrity is preserved and there is no significant tissue inflammation or necrosis, PIN does not typically cause a rise in serum PSA levels. **Analysis of Incorrect Options:** * **A. Acute Prostatitis:** Intense inflammation and infection cause significant disruption of the prostatic epithelium and cellular membranes, leading to a massive leakage of PSA into the systemic circulation. * **B. Benign Prostatic Hyperplasia (BPH):** PSA is organ-specific, not cancer-specific. In BPH, the increased volume of prostatic tissue (hyperplasia) leads to a proportional increase in PSA production. * **D. Prostatic Needle Biopsy:** Mechanical trauma and the physical breach of the prostatic-blood barrier during the procedure cause an immediate, transient spike in serum PSA. **High-Yield Clinical Pearls for NEET-PG:** * **PSA Velocity:** An increase of **>0.75 ng/mL/year** is highly suggestive of malignancy, even if the absolute value is 25%** is more common in BPH. * **Wait Time:** After a digital rectal exam (DRE) or biopsy, wait at least **4–6 weeks** before measuring PSA to avoid false elevations.

Question 1

On exertion, in which condition does the urine stream increase?

Accepted Answer

Urethral stricture

Answer

Prostate enlargement

Answer

Marion's disease

Answer

Posterior urethral valves

Question 2

An elderly male presents with one episode of gross hematuria. Which of the following investigations is NOT recommended for investigating this patient?

Accepted Answer

Urine tumor markers

Answer

Cystoscopy

Answer

Urine microscopy for malignant cells

Answer

Intravenous pyelogram

Question 3

What is the drug of choice for surgically unresectable renal cell carcinoma?

Accepted Answer

Sunitinib

Answer

Sorafenib

Answer

Imatinib

Answer

Cetuximab

Question 4

A male patient presents with acute scrotal pain. Which investigation is most effective in differentiating between testicular torsion and epididymo-orchitis?

Accepted Answer

Color Doppler

Answer

Angel sign

Answer

Prehn sign

Answer

MRI

Question 5

A 10-mm calculus in the right lower ureter associated with proximal hydroureteronephrosis is best treated with?

Accepted Answer

Ureteroscopic retrieval

Answer

Extracorporeal shockwave lithotripsy

Answer

Antegrade percutaneous access

Answer

Open ureterolithotomy

Question 6

A 70-year-old male chronic smoker is diagnosed with cancer of the urinary bladder, confined to the trigone with extension up to the submucosa. What is the recommended management?

Accepted Answer

Complete transurethral resection with intravesical chemotherapy

Answer

Complete transurethral resection

Answer

Palliative radiotherapy

Answer

Radical cystectomy

Question 7

Which of the following is true of blunt renal trauma?

Accepted Answer

Blunt renal trauma requires exploration only when the patient exhibits hemodynamic instability.

Answer

Blunt renal trauma and penetrating renal injuries are managed similarly.

Answer

Blunt renal trauma must be evaluated by contrast studies using either IVP or CT.

Answer

Any kidney fractured by blunt renal trauma must be explored.

Question 8

An 85-year-old man underwent transurethral resection of the prostate. Histological examination of his specimen showed T1a stage adenocarcinoma. What is the appropriate management?

Accepted Answer

No further treatment

Answer

Endocrine therapy

Answer

Radical surgery

Answer

Hormone therapy

Question 9

What is the most common cause of urethral stricture?

Accepted Answer

Trauma

Answer

Infection

Answer

Congenital

Answer

Post endoscopy

Question 10

Which of the following conditions is NOT associated with an elevation in prostatic specific antigen?

Accepted Answer

Prostatic intraepithelial neoplasia

Answer

Acute prostatitis

Answer

Benign prostatic hyperplasia (BPH)

Answer

Prostatic needle biopsy

Urology — MCQs

Urology — MCQs

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