Urology Practice Questions

Q: The "Triangle of Doom" is bounded by all of the following structures except?

Cooper's ligament. The **Triangle of Doom** is a critical anatomical landmark in laparoscopic inguinal hernia repair (TEP/TAPP). It is an inverted V-shaped area located at the internal inguinal ring. ### **Explanation of the Correct Answer** **A. Cooper’s Ligament:** This is the correct answer because it does **not** form a boundary of the Triangle of Doom. Instead, Cooper’s ligament (pectineal ligament) forms the posterior boundary of the **Triangle of Pain**. In laparoscopic surgery, Cooper’s ligament is used as a landmark for anchoring the mesh, but it lies inferior to the Triangle of Doom. ### **Analysis of Incorrect Options (Boundaries of the Triangle)** The Triangle of Doom is defined by: * **B. Vas Deferens:** Forms the **medial** boundary. * **C. Gonadal Vessels:** Form the **lateral** boundary. * **D. Peritoneal Reflection:** Forms the **superior** boundary (base). ### **Clinical Significance & High-Yield Pearls** * **Contents:** The most critical structure within this triangle is the **External Iliac Artery and Vein**. * **Surgical Importance:** Surgeons must avoid placing tacks, staples, or sutures within this triangle. Injury to the vessels here can lead to catastrophic, life-threatening hemorrhage. * **Triangle of Pain:** Located **lateral** to the Triangle of Doom (lateral to the gonadal vessels). It is bounded by the gonadal vessels (medially) and the iliopubic tract (laterally). It contains the **Femoral nerve, Genitofemoral nerve (genital branch), and Lateral femoral cutaneous nerve**. Tacking here leads to chronic post-operative neuralgia. * **Mnemonic:** "Doom" involves **Vessels** (Iliacs); "Pain" involves **Nerves**.

Q: What are the common complications of ureterosigmoidostomy?

Hyperchloremic with hypokalemic acidosis. **Explanation:** Ureterosigmoidostomy is a form of urinary diversion where the ureters are implanted into the sigmoid colon. While largely replaced by ileal conduits, it remains a high-yield topic in NEET-PG due to its classic metabolic complications. **Why Option A is correct:** The primary complication is **Hyperchloremic Hypokalemic Metabolic Acidosis**. This occurs due to the prolonged contact of urine with the colonic mucosa: 1. **Chloride/Bicarbonate Exchange:** The colonic mucosa actively reabsorbs chloride ions from the urine in exchange for bicarbonate ions, leading to bicarbonate loss and systemic acidosis. 2. **Ammonium Reabsorption:** The bowel reabsorbs urinary ammonium ($NH_4^+$), which is metabolized in the liver to urea and hydrogen ions, further worsening the acidosis. 3. **Potassium Loss:** To maintain electrical neutrality and due to the secretory nature of the colon, potassium is excreted into the bowel lumen and lost in the stool, resulting in hypokalemia. **Why other options are incorrect:** * **B & C:** Metabolic alkalosis and hyperkalemia are physiologically opposite to the effects of colonic urinary diversion. * **D:** While minor electrolyte shifts occur, hyponatremia is not the hallmark metabolic derangement of this procedure. **High-Yield Clinical Pearls for NEET-PG:** * **Late Complication:** The most dreaded long-term complication is **Adenocarcinoma of the colon** (usually at the site of ureteric implantation), occurring 10–20 years post-surgery. * **Other Complications:** Ascending pyelonephritis (due to fecal reflux), urolithiasis, and growth retardation in children. * **Contraindication:** It should never be performed in patients with a weak anal sphincter, as it leads to total urinary/fecal incontinence.

Q: All of the following are seen in hypospadias except?

Ectopia vesicae. **Explanation:** Hypospadias is a congenital anomaly characterized by the failure of the urethral folds to fuse, resulting in the urethral meatus opening on the ventral aspect of the penis. **Why Ectopia Vesicae is the correct answer:** Ectopia vesicae (bladder exstrophy) is a severe midline defect involving the failure of the infra-umbilical abdominal wall and anterior bladder wall to close. While it is associated with **epispadias** (urethral opening on the *dorsal* aspect), it is not a feature of hypospadias. These two conditions arise from different embryological failures. **Analysis of other options:** * **Hooded Prepuce:** This is a hallmark of hypospadias. Due to the failure of the ventral prepuce to develop, the dorsal foreskin becomes redundant and hangs over the glans like a "hood." * **Chordee:** This refers to the ventral curvature of the penis, often caused by a fibrous band of tissue or skin tethering. It is a classic component of the hypospadias triad. * **Infertility:** While not universal, hypospadias can lead to infertility due to the abnormal position of the meatus (causing failure of sperm deposition in the vaginal vault) or associated undescended testes (cryptorchidism). **High-Yield Clinical Pearls for NEET-PG:** * **The Hypospadias Triad:** 1. Ventral meatus, 2. Ventral chordee, 3. Hooded dorsal prepuce. * **Contraindication:** Circumcision is strictly contraindicated in these infants because the prepuce is required for future surgical reconstruction (urethroplasty). * **Commonest Site:** Glandular/Coronal (Distal). * **Associated Anomalies:** Cryptorchidism (10%) and Inguinal hernia. If a child has hypospadias and undescended testes, always screen for Disorders of Sex Development (DSD).

Q: What is the commonest cause of urethral stricture in a young person?

Trauma. **Explanation:** The epidemiology of urethral strictures has shifted significantly in recent decades. In modern clinical practice, **Trauma** is the most common cause of urethral strictures in young individuals in developed and developing nations alike. 1. **Why Trauma is Correct:** In young patients, trauma typically occurs via two mechanisms: **Straddle injuries** (falling astride an object), which lead to bulbar urethral strictures, and **Pelvic fractures** (often from motor vehicle accidents), which typically cause posterior urethral distractions. These injuries lead to scarring and fibrosis of the urethral corpus spongiosum (spongiofibrosis), resulting in a narrowed lumen. 2. **Why Incorrect Options are Wrong:** * **Gonococcal infection:** Historically, this was the leading cause worldwide. However, with the advent of effective antibiotic therapy, post-inflammatory strictures have become less common, though they remain a significant cause in specific geographic regions. * **Syphilis and Tuberculosis:** These are extremely rare causes of urethral strictures. Syphilis rarely involves the urethra in a way that leads to stricture, and TB typically affects the upper urinary tract or the prostate/epididymis rather than the penile urethra. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of Traumatic stricture:** Bulbar urethra (following straddle injury). * **Most common site of Post-TURP stricture:** Fossa navicularis or bladder neck. * **Gold Standard Investigation:** Retrograde Urethrogram (RUG) combined with Voiding Cystourethrogram (VCUG) to define the length and location. * **Management:** Short strictures (<2cm) are often treated with **Direct Vision Internal Urethrotomy (DVIU)**; longer or recurrent strictures require **Urethroplasty** (e.g., Buccal Mucosa Graft).

Q: What is the most common site for tumors of the minor salivary glands?

Retromolar area. **Explanation:** The minor salivary glands are distributed throughout the upper aerodigestive tract, with an estimated 500 to 1,000 glands located in the submucosa. **Why Retromolar Area is Correct:** While the **palate** (specifically the junction of the hard and soft palate) is the single most common site overall for minor salivary gland tumors, among the options provided, the **retromolar area** (or retromolar trigone) represents a high-frequency site. In the context of standard surgical textbooks and NEET-PG patterns, when the palate is not listed, the retromolar area/buccal mucosa complex is the preferred answer. It is important to note that minor salivary gland tumors have a higher malignancy rate (approx. 50-80%) compared to parotid tumors. **Why Other Options are Incorrect:** * **Pharyngeal cavities:** While glands exist here, tumors are significantly rarer than in the oral cavity. * **Paranasal sinuses:** These are infrequent sites; however, tumors here (like Adenoid Cystic Carcinoma) carry a poorer prognosis due to late presentation. * **Nasal cavity:** Similar to the sinuses, these account for a small percentage of minor salivary gland neoplasms. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 80s (Parotid):** 80% are in the parotid, 80% are Pleomorphic Adenoma, 80% are in the superficial lobe. * **Malignancy Ratio:** The smaller the gland, the higher the chance of malignancy (Parotid ~25%, Submandibular ~40%, Minor glands >50%). * **Most Common Benign Tumor:** Pleomorphic Adenoma (even in minor glands). * **Most Common Malignant Tumor:** Mucoepidermoid Carcinoma (overall); however, Adenoid Cystic Carcinoma is very common in minor glands and is known for **perineural invasion**.

Q: What is the treatment of choice for grade IV vesicoureteric reflux with recurrent UTI?

Cotrimoxazole. The management of Vesicoureteric Reflux (VUR) in children is primarily focused on preventing renal scarring and permanent damage (reflux nephropathy) by controlling urinary tract infections (UTIs). ### **Explanation of the Correct Answer** **A. Cotrimoxazole:** The standard initial management for VUR, including Grade IV, is **Continuous Antibiotic Prophylaxis (CAP)**. The goal is to keep the urine sterile while waiting for spontaneous resolution, which occurs in a significant percentage of high-grade cases (up to 40-60% in Grade IV). Low-dose Cotrimoxazole (Trimethoprim-Sulfamethoxazole) or Nitrofurantoin are the drugs of choice. Surgery is reserved only for cases where medical management fails. ### **Why Other Options are Incorrect** * **B. Bilateral reimplantation of ureter:** This is a surgical intervention (e.g., Cohen’s or Leadbetter-Politano technique). It is indicated only if there is breakthrough UTI despite prophylaxis, non-compliance with medication, or worsening renal function. It is **not** the first-line treatment. * **C. Injection of collagen/Deflux:** This is an endoscopic treatment (STING procedure). While less invasive than surgery, it is typically considered if prophylaxis fails or as an alternative to major surgery, not as the primary treatment of choice. * **D. Endoscopic resection of ureter:** This is not a treatment for VUR; it is used for conditions like ureteroceles or bladder outlet obstructions. ### **Clinical Pearls for NEET-PG** * **Grading (International Reflux Study):** Grade IV involves gross dilation of the ureter and pelvis with moderate tortuosity and blunting of fornices. * **Spontaneous Resolution:** Most VUR (Grades I-III) resolves spontaneously. Grade IV has a moderate chance, while Grade V rarely resolves. * **Gold Standard Investigation:** Voiding Cystourethrogram (VCUG/MCU). * **Surgery Indications:** Breakthrough UTIs, Grade V reflux in older children, or failure of renal growth.

Question 1

Thimble bladder is seen in which of the following conditions?

Accepted Answer

Acute tubercular cystitis

Answer

Cystitis

Answer

Chronic tubercular cystitis

Answer

Neurogenic bladder

Question 2

The "Triangle of Doom" is bounded by all of the following structures except?

Accepted Answer

Cooper's ligament

Answer

Vas deferens

Answer

Gonadal vessels

Answer

Peritoneal reflection

Question 3

What are the common complications of ureterosigmoidostomy?

Accepted Answer

Hyperchloremic with hypokalemic acidosis

Answer

Hyperkalemia

Answer

Metabolic alkalosis

Answer

Hyponatremia

Question 4

In a patient suspected to be suffering from vesicoureteric reflux, which one of the following radiological investigations may confirm the diagnosis?

Accepted Answer

Micturating cystourethrography

Answer

Intravenous urography

Answer

Pelvic ultrasound

Answer

Antegrade pyelography

Question 5

All of the following are seen in hypospadias except?

Accepted Answer

Ectopia vesicae

Answer

Hooded prepuce

Answer

Chordee

Answer

Infertility

Question 6

What is the most common location of an anorectal fistula?

Accepted Answer

Intersphincteric

Answer

Transsphincteric

Answer

Suprasphincteric

Answer

Extrasphincteric

Question 7

What is the commonest cause of urethral stricture in a young person?

Accepted Answer

Trauma

Answer

Gonococcal infection

Answer

Syphilis

Answer

Tuberculosis

Question 8

What is the most common site for tumors of the minor salivary glands?

Accepted Answer

Retromolar area

Answer

Pharyngeal cavities

Answer

Paranasal sinuses

Answer

Nasal cavity

Question 9

What is the treatment of choice for grade IV vesicoureteric reflux with recurrent UTI?

Accepted Answer

Cotrimoxazole

Answer

Bilateral reimplantation of ureter

Answer

Injection of collagen in the ureter

Answer

Endoscopic resection of ureter

Question 10

Which of the following statements concerning carcinoma of the prostate is FALSE?

Accepted Answer

Radical prostatectomy is associated with a 5% incidence of permanent urinary incontinence.

Answer

Annual digital rectal examination and serum prostate specific antigen (PSA) determinations are recommended for screening.

Answer

Lung metastasis is less common than bone metastasis.

Answer

Once prostate cancer has spread, it is no longer curable but can be contained by lowering serum testosterone and/or by administration of androgen receptor blockers.

Urology — MCQs

Urology — MCQs

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