Urology Practice Questions

Q: Which among the following is the most important preventive strategy of penile cancer?

Neonatal circumcision. **Explanation:** The primary risk factor for penile squamous cell carcinoma (SCC) is **phimosis**, which leads to the accumulation of smegma and chronic inflammation (balanoposthitis). **Neonatal circumcision** is considered the most effective preventive strategy because it virtually eliminates the risk of phimosis and facilitates better local hygiene. Epidemiological studies show that penile cancer is extremely rare in communities where neonatal circumcision is universal (e.g., Jewish populations). Notably, circumcision performed in adulthood does not offer the same level of protection as neonatal circumcision. **Analysis of Incorrect Options:** * **HPV Vaccination (A):** While HPV (Types 16 and 18) is associated with approximately 40-50% of penile cancers, it is not the most significant preventive factor compared to the mechanical protection offered by circumcision. * **Condom Use (B):** Condoms reduce the risk of HPV and other STIs but do not address the risk posed by smegma accumulation or phimosis in uncircumcised males. * **Cessation of Smoking (D):** Smoking is a known independent risk factor for penile cancer (likely due to the accumulation of carcinogenic metabolites in the preputial sac), but its impact is secondary to the protective effect of circumcision. **Clinical Pearls for NEET-PG:** * **Most common type:** Squamous Cell Carcinoma (95%). * **Precancerous lesions:** Erythroplasia of Queyrat (glans), Bowen’s disease (shaft), and Balanitis Xerotica Obliterans (BXO). * **Protective Factor:** Neonatal circumcision is the single most important protective factor. * **Risk Factors:** Phimosis (highest risk), HPV 16/18, smoking, and poor hygiene.

Q: Which of the following is a key differentiator between functional gastrointestinal disorders and organic gastrointestinal disorders?

Bleeding per rectum. In clinical urology and surgery, differentiating between **functional** and **organic** disorders is a critical step in diagnosis. ### **Explanation of the Correct Answer** **Bleeding per rectum (Option D)** is a classic "Red Flag" or "Alarm Symptom." Its presence almost always indicates an **organic pathology**—a structural, inflammatory, or neoplastic change in the tissue. Functional disorders (like Irritable Bowel Syndrome) are characterized by altered physiological function without any detectable structural or biochemical abnormalities. Since functional disorders do not involve mucosal ulceration, inflammation, or malignancy, they do not cause gastrointestinal bleeding. ### **Analysis of Incorrect Options** * **Abdominal pain (Option A):** This is a hallmark of both functional (e.g., IBS) and organic (e.g., Appendicitis, IBD) conditions. In functional disorders, pain is often related to visceral hypersensitivity. * **Diarrhea (Option B):** This can occur in functional states (IBS-D) due to rapid transit or in organic states (Malabsorption, Infections) due to osmotic or secretory changes. * **Tenesmus (Option C):** While common in organic conditions like rectal proctitis or malignancy, it can also be seen in functional defecatory disorders. ### **NEET-PG High-Yield Pearls** * **Alarm Symptoms (Organic Indicators):** In any surgical or GI case, look for: 1. Unintentional weight loss (>10% in 6 months). 2. Nocturnal symptoms (Functional pain rarely wakes a patient from sleep). 3. Anemia or Bleeding per rectum. 4. Palpable abdominal mass or Lymphadenopathy. 5. Onset of symptoms after age 50. * **Rome IV Criteria:** Used primarily to diagnose functional GI disorders; the absence of organic "red flags" is a prerequisite for these diagnoses.

Q: What is true about undescended testes?

Normal testosterone production. **Explanation:** **1. Why Option A is Correct:** In undescended testes (cryptorchidism), the **Leydig cells** (responsible for testosterone production) are relatively resistant to the higher core body temperature. Therefore, even if the testis is intra-abdominal or inguinal, testosterone levels usually remain within the normal range. In contrast, the **Sertoli cells** and **germinal epithelium** are highly temperature-sensitive and undergo atrophy, leading to impaired fertility but preserved secondary sexual characteristics. **2. Why Incorrect Options are Wrong:** * **Option B:** Normal spermatogenesis does **not** occur. The higher temperature of the abdomen/inguinal canal inhibits the maturation of germ cells. If left uncorrected, it leads to oligospermia or azoospermia. * **Option C:** Physiological descent of the testis is usually complete by birth. While some descent can occur postnatally, it typically stops by **6 months** of age. If the testis is not in the scrotum by 6 months, spontaneous descent is unlikely, and surgical intervention (Orchidopexy) is indicated. * **Option D:** This describes **Ectopic Testis**, not undescended testis. In cryptorchidism, the testis stops somewhere along the **normal path** of descent. In ectopic testis, the testis deviates from the normal path (most common site: Superficial Inguinal Pouch). **Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Ideal age for Orchidopexy:** 6 to 12 months (to preserve fertility and allow for early screening). * **Complications:** Increased risk of Inguinal Hernia (most common), Torsion, Trauma, and **Testicular Malignancy** (Seminoma is the most common; Orchidopexy does not eliminate the risk but makes the testis palpable for screening). * **Investigation of choice:** Ultrasonography (initial); Diagnostic Laparoscopy (Gold Standard for impalpable testes).

Q: Cabana procedure is done in which of the following conditions?

Sentinel lymph node biopsy in penile carcinoma. **Explanation:** The **Cabana procedure** refers to the identification and biopsy of the **Sentinel Lymph Node (SLN)** in patients with **Carcinoma of the Penis**. In 1977, Ramon Cabana performed lymphangiograms and identified a specific group of lymph nodes located near the superficial epigastric vein and the pudendal vein, which he termed the "sentinel nodes." The underlying medical concept is that lymphatic spread from the penis follows a predictable pattern, first reaching these specific nodes. If the sentinel node is negative for metastasis, the remaining nodes in the inguinal basin are likely clear, thereby sparing the patient from the high morbidity associated with a radical inguinal lymphadenectomy (e.g., skin necrosis, lymphedema). **Analysis of Options:** * **Option A & B:** While Carcinoma of the testis involves lymphatic spread, it primarily drains to the **para-aortic (retroperitoneal)** lymph nodes. The surgical management is Radical Orchidectomy followed by **Retroperitoneal Lymph Node Dissection (RPLND)**, not the Cabana procedure. * **Option D:** While the Cabana procedure is used *for* penile cancer, it specifically refers to the **biopsy technique (SLNB)** rather than the definitive treatment of the primary tumor or a radical nodal clearance. **High-Yield Clinical Pearls for NEET-PG:** * **Cabana’s Node:** Located at the junction of the epigastric and long saphenous veins. * **Modern Technique:** Today, SLNB is more accurately performed using **Dynamic Sentinel Node Biopsy (DSNB)** involving Technetium-99m sulfur colloid and isosulfan blue dye. * **Indication:** Recommended for patients with clinically non-palpable inguinal nodes (cN0) but high-risk primary tumors (≥T1G2).

Q: A young man presents with primary infertility, and his semen analysis reveals low volume, fructose-negative ejaculate with azoospermia. Which of the following is the most useful imaging modality to evaluate the cause of his infertility?

Transrectal ultrasonography. ### Explanation The clinical presentation of **azoospermia** (no sperm), **low semen volume** (<1.5 ml), and **fructose-negative** ejaculate is a classic triad suggesting **Ejaculatory Duct Obstruction (EDO)** or Congenital Bilateral Absence of the Vas Deferens (CBAVD). **Why Transrectal Ultrasonography (TRUS) is the correct answer:** Fructose is produced in the seminal vesicles. If the ejaculate is fructose-negative and low volume, it indicates that the secretions from the seminal vesicles are not reaching the urethra. TRUS is the gold standard imaging modality to visualize the prostate, seminal vesicles, and ejaculatory ducts. It can identify dilated seminal vesicles (>15mm width), ejaculatory duct cysts, or calcifications causing the obstruction, which are potentially treatable causes of male infertility. **Analysis of Incorrect Options:** * **A. Colour duplex ultrasonography of the scrotum:** This is the investigation of choice for **Varicocele** or testicular pathology. While it can detect the absence of the vas in the scrotum, it cannot visualize the ejaculatory ducts or seminal vesicles. * **C. Retrograde urethrography (RGU):** Used primarily to diagnose urethral strictures or trauma; it does not provide information regarding the internal male reproductive tract. * **D. Spermatic venography:** This is an invasive "gold standard" for diagnosing subclinical varicoceles but is rarely used today and is irrelevant to obstructive azoospermia. **NEET-PG High-Yield Pearls:** * **Normal Semen pH:** Alkaline (>7.2). In EDO/CBAVD, the semen is often **acidic** because the alkaline seminal vesicle fluid is missing. * **CBAVD Association:** Strongly associated with **CFTR gene mutations** (Cystic Fibrosis). * **Treatment of EDO:** Transurethral Resection of the Ejaculatory Ducts (TURED). * **Initial Test for Infertility:** Semen analysis (performed after 2–7 days of abstinence).

Q: What investigation is done to differentiate between stress incontinence and detrusor instability?

Urodynamic study. **Explanation:** The differentiation between **Stress Urinary Incontinence (SUI)** and **Detrusor Overactivity (Urge Incontinence)** is primarily functional rather than anatomical. 1. **Why Urodynamic Study (UDS) is correct:** Urodynamics is the gold standard for evaluating lower urinary tract function. * In **Stress Incontinence**, UDS (specifically cystometry) demonstrates involuntary leakage of urine in the absence of a detrusor contraction when intra-abdominal pressure rises (e.g., coughing/Valsalva). * In **Detrusor Instability**, UDS shows involuntary detrusor contractions during the filling phase, which the patient cannot suppress. Since management differs significantly (Surgery for SUI vs. Pharmacotherapy for Detrusor instability), UDS is crucial for an accurate diagnosis. 2. **Why other options are incorrect:** * **Cystourethroscopy:** This is an anatomical study used to rule out bladder stones, tumors, or urethral diverticula. It cannot assess the functional pressure changes required to diagnose instability. * **MCU (Micturating Cystourethrogram):** Primarily used to diagnose Vesicoureteral Reflux (VUR), posterior urethral valves, or bladder neck anomalies. It does not provide real-time pressure-flow data. * **Retrograde Urethroscopy:** Used to visualize urethral strictures or trauma; it has no role in evaluating incontinence. **High-Yield Clinical Pearls for NEET-PG:** * **First-line investigation** for any urinary incontinence is a **Frequency-Volume Chart (Bladder Diary)**. * **Q-tip test:** Used to assess urethral hypermobility in SUI (positive if angle >30°). * **Gold Standard for SUI:** Mid-urethral slings (TVT/TOT). * **Gold Standard for Detrusor Instability:** Anticholinergics (e.g., Oxybutynin) or Mirabegron (Beta-3 agonist).

Q: Which type of urinary stone is resistant to lithotripsy?

Cystine stone. **Explanation:** The susceptibility of a urinary stone to Extracorporeal Shock Wave Lithotripsy (ESWL) depends on its crystalline structure and density. **Cystine stones** are notoriously resistant to lithotripsy because they possess a "homogeneous" crystalline structure and high elasticity, which allows them to absorb shock wave energy without fracturing easily. On imaging, they often appear as "ground-glass" opacities and are less radio-opaque than calcium stones. **Analysis of Options:** * **Calcium oxalate (Option A):** These are the most common stones. Calcium oxalate *dihydrate* stones are very brittle and easy to fragment, while *monohydrate* stones are harder but still more susceptible than cystine. * **Triple phosphate (Option B):** Also known as Struvite or Staghorn calculi, these are generally soft and fragment well with lithotripsy, although their large volume often necessitates Percutaneous Nephrolithotomy (PCNL). * **Uric acid (Option C):** These are radiolucent stones. While they are soft and would fragment easily, ESWL is difficult because they cannot be easily targeted under fluoroscopy (requiring ultrasound guidance or contrast). However, they are not "resistant" in terms of structural hardness. **High-Yield Clinical Pearls for NEET-PG:** * **Hardest Stone:** Cystine (most resistant to ESWL). * **Softest Stone:** Uric acid. * **Hexagonal Crystals:** Pathognomonic for Cystinuria (an autosomal recessive transport defect of COLA: Cystine, Ornithine, Lysine, Arginine). * **Management:** Because of ESWL resistance, large cystine stones are typically managed via **PCNL** or retrograde intrarenal surgery (RIRS) using Holmium:YAG lasers.

Q: Physical examination of a neonate reveals a distended bladder and palpable kidneys. The infant produces a weak urinary stream. A voiding cystourethrogram is shown. He appears to be otherwise normal. Which of the following is the most likely diagnosis?

Posterior urethral valve. ***Posterior urethral valve*** - **Voiding cystourethrogram** shows **dilated posterior urethra** with **keyhole sign** and **trabeculated bladder**, pathognomonic for posterior urethral valves in male neonates. - Clinical presentation of **distended bladder**, **palpable kidneys**, and **weak urinary stream** is classic for **infravesical obstruction** caused by posterior urethral valves. *Ureteropelvic junction obstruction* - Would cause **hydronephrosis** but **normal bladder** appearance on imaging, not the distended bladder seen here. - Typically presents with **flank pain** or **palpable flank mass**, not bladder distension or weak urinary stream. *Prune belly syndrome* - Characterized by **absent abdominal wall musculature**, **cryptorchidism**, and **urinary tract abnormalities** - not just isolated urinary symptoms. - VCUG would show **tortuous, dilated ureters** and **large bladder**, but without the **keyhole sign** of posterior urethra dilation. *Duplication of the collecting system* - Usually **asymptomatic** in neonates or presents with **recurrent UTIs**, not bladder distension or weak stream. - VCUG would demonstrate **duplicated collecting systems** with possible **vesicoureteral reflux**, not posterior urethral dilation.

Question 1

Which among the following is the most important preventive strategy of penile cancer?

Accepted Answer

Neonatal circumcision

Answer

HPV vaccination

Answer

Condom use

Answer

Cessation of smoking

Question 2

Which of the following is a key differentiator between functional gastrointestinal disorders and organic gastrointestinal disorders?

Accepted Answer

Bleeding per rectum

Answer

Abdominal pain

Answer

Diarrhea

Answer

Tenesmus

Question 3

What is true about undescended testes?

Accepted Answer

Normal testosterone production

Answer

Normal spermatogenesis

Answer

Physiological descent normally occurs up to 18 months

Answer

Testes deviate from the normal path

Question 4

Cabana procedure is done in which of the following conditions?

Accepted Answer

Sentinel lymph node biopsy in penile carcinoma

Answer

Carcinoma of testis

Answer

Retroperitoneal lymph node dissection

Answer

Carcinoma of penis

Question 5

Which of the following statements is NOT true regarding undescended testes?

Accepted Answer

The risk of developing testicular malignancy is about 20 times higher.

Answer

Surgery for undescended testes does not decrease the chances of developing testicular carcinoma.

Answer

Approximately 70% of cryptorchid testes descend by 3 months of age.

Answer

Patients typically have normal secondary sexual characteristics.

Question 6

A young man presents with primary infertility, and his semen analysis reveals low volume, fructose-negative ejaculate with azoospermia. Which of the following is the most useful imaging modality to evaluate the cause of his infertility?

Accepted Answer

Transrectal ultrasonography

Answer

Colour duplex ultrasonography of the scrotum

Answer

Retrograde urethrography

Answer

Spermatic venography

Question 7

What investigation is done to differentiate between stress incontinence and detrusor instability?

Accepted Answer

Urodynamic study

Answer

Cystourethroscopy

Answer

MCU

Answer

Retrograde urethroscopy

Question 8

Which type of urinary stone is resistant to lithotripsy?

Accepted Answer

Cystine stone

Answer

Calcium oxalate stone

Answer

Triple phosphate stone

Answer

Uric acid stone

Question 9

Physical examination of a neonate reveals a distended bladder and palpable kidneys. The infant produces a weak urinary stream. A voiding cystourethrogram is shown. He appears to be otherwise normal. Which of the following is the most likely diagnosis?

Accepted Answer

Posterior urethral valve

Answer

Ureteropelvic junction obstruction

Answer

Prune belly syndrome

Answer

Duplication of the collecting system

Question 10

Prostate cancer is best diagnosed by?

Accepted Answer

Transurethral ultrasound

Answer

Prostate specific antigen

Answer

Fine needle aspiration cytology of prostate gland

Answer

Digital rectal examination

Urology — MCQs

Urology — MCQs

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