Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 791: In abdominal surgery, Lembert sutures refer to:

A. Single layer suturing
B. Sero-muscular sutures (Correct Answer)
C. All coat intestinal suturing
D. Skin suturing

Explanation: **Explanation:** The **Lembert suture** is a classic technique used in gastrointestinal and urological surgery. It is an **inverting, interrupted, seromuscular suture** that does not penetrate the mucosa. **1. Why Option B is Correct:** The primary principle of the Lembert suture is to achieve **serosa-to-serosa apposition**. By picking up only the serosa and the underlying muscularis (seromuscular layer), the suture causes the edges of the tissue to invert. This is crucial in abdominal surgery because serosal surfaces heal rapidly through fibrin deposition, creating a watertight and airtight seal, which prevents leaks in intestinal or bladder anastomoses. **2. Why Other Options are Incorrect:** * **Option A (Single layer):** While Lembert sutures can be used in single-layer closures, the term specifically describes the *depth* and *technique* (seromuscular) rather than the number of layers. * **Option C (All coat):** Sutures that involve all layers (including mucosa) are called **transmural** or "through-and-through" sutures (e.g., Connell or Cushing sutures). Lembert sutures specifically avoid the mucosa to prevent "wicking" of luminal contents to the exterior. * **Option D (Skin):** Skin suturing typically involves simple interrupted, mattress, or subcuticular techniques; Lembert sutures are strictly internal. **Clinical Pearls for NEET-PG:** * **Inverting Sutures:** Lembert, Connell (continuous, all-coat), and Cushing (continuous, seromuscular). * **Everting Sutures:** Mattress sutures (Horizontal and Vertical) and Collier’s suture. * **High-Yield Fact:** The Lembert suture is the most common technique used for the **outer layer** of a two-layer intestinal anastomosis. * **Urology Link:** It is frequently used to close the bladder (cystotomy) to ensure a leak-proof, inverted seal.

Question 792: What is the most common tumor of the urinary bladder?

A. Squamous cell carcinoma
B. Adenocarcinoma
C. Transitional cell carcinoma (Correct Answer)
D. Stratified squamous carcinoma

Explanation: **Explanation:** **Correct Answer: C. Transitional cell carcinoma (TCC)** The urinary bladder is lined by a specialized epithelium known as **urothelium** (transitional epithelium). Consequently, **Transitional Cell Carcinoma (TCC)**, now more commonly referred to as **Urothelial Carcinoma**, is the most common histological type, accounting for approximately **90-95%** of all bladder cancers in developed countries. The primary risk factors for TCC include cigarette smoking and occupational exposure to aromatic amines (e.g., aniline dyes). **Incorrect Options:** * **A & D. Squamous cell carcinoma (SCC):** While SCC is the second most common type (~3-7%), it only becomes the most common in specific geographical regions where **Schistosomiasis (Schistosoma haematobium)** is endemic. Chronic irritation from long-term indwelling catheters or bladder stones also predisposes to SCC. * **B. Adenocarcinoma:** This is rare (<2%) and usually arises from the **urachus** (at the dome of the bladder) or in the setting of **bladder exstrophy** or cystitis glandularis. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Cystoscopy with biopsy is the definitive diagnostic tool. * **Most Common Symptom:** Painless, gross hematuria (present in 85% of cases). * **Field Change Effect:** The entire urothelium (from renal pelvis to urethra) is at risk due to "field cancerization," meaning tumors are often multifocal and recurrent. * **Staging:** The **TNM system** is used; the involvement of the **detrusor muscle (T2)** is the critical prognostic factor that determines whether a patient needs radical cystectomy.

Question 793: Cobra head appearance is described for which of the following conditions?

A. Benign Prostatic Hyperplasia (BPH)
B. Bladder tumor
C. Vesical calculus
D. Ureterocele (Correct Answer)

Explanation: **Explanation:** The **Cobra head appearance** (also known as the **Adder head** or **Spring onion** sign) is a classic radiological finding seen on an Intravenous Urogram (IVU) or Contrast CT in patients with a **Ureterocele**. A ureterocele is a congenital cystic dilatation of the distal-most intramural portion of the ureter. This occurs due to a delayed canalization of the Chwalla’s membrane. The "Cobra head" look is created by: 1. The radiopaque contrast filling the dilated distal ureter (the "head"). 2. A surrounding radiolucent halo, which represents the thin, edematous wall of the ureterocele and the bladder mucosa. **Analysis of Incorrect Options:** * **Benign Prostatic Hyperplasia (BPH):** Characteristically shows a **"J-shaped" or "Fish-hook" ureter** on IVU due to the upward displacement of the distal ureters by the enlarged prostate. It may also show a smooth filling defect at the base of the bladder. * **Bladder Tumor:** Typically presents as an irregular, fixed **filling defect** within the bladder lumen. It does not have the characteristic halo or symmetric dilatation of a ureterocele. * **Vesical Calculus:** Appears as a mobile, radiopaque shadow on plain X-ray (KUB) or a mobile filling defect on IVU. It lacks the specific cystic configuration of a ureterocele. **High-Yield Clinical Pearls for NEET-PG:** * **Ectopic Ureterocele:** More common in children; usually associated with the upper pole of a **duplicated collecting system** (Weigert-Meyer Law). * **Orthotopic (Simple) Ureterocele:** More common in adults; usually involves a single system. * **Complications:** Ureteroceles can lead to stone formation (due to stasis) and recurrent UTIs. * **Treatment:** Endoscopic incision is the preferred initial management for symptomatic cases.

Question 794: What type of stapler is used for Minimally Invasive Pararectal Hernia (MIPH)?

A. Linear cutting stapler
B. Circular cutting stapler (Correct Answer)
C. Linear stapler
D. Circular stapler

Explanation: **Explanation:** **MIPH (Minimally Invasive Procedure for Hemorrhoids)**, also known as Stapled Hemorrhoidopexy or the Longo procedure, is a technique used to treat grade III and IV internal hemorrhoids. The primary goal is to excise a circumferential ring of redundant rectal mucosa and submucosa above the dentate line and interrupt the blood supply to the hemorrhoidal plexus. 1. **Why Option B is Correct:** The procedure requires a **Circular Cutting Stapler**. This specialized device performs two actions simultaneously: it uses a circular blade to **cut/excise** a ring of tissue while simultaneously deploying a circular double row of titanium staples to **anastomose** the mucosal ends. This "lifts" the prolapsed tissue back into its anatomical position (hemorrhoidopexy). 2. **Why other options are incorrect:** * **Linear Stapler/Linear Cutting Stapler:** These are used for straight-line closures or transections (e.g., lung resection or gastrointestinal side-to-side anastomosis) and cannot accommodate the circumferential anatomy of the rectum. * **Circular Stapler:** While similar, a standard circular stapler (like those used in EEA for low anterior resection) is designed for end-to-end anastomosis of two separate lumens. The specific kit for MIPH is a modified circular stapler designed to pull a large volume of prolapsed mucosa into the housing before cutting. **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** Best for 3rd and 4th-degree internal hemorrhoids; not indicated for external hemorrhoids. * **Anatomical Landmark:** The staple line must be placed **2–3 cm above the dentate line** in the "insensitive" zone to ensure the procedure is painless. * **Complications:** While less painful than open hemorrhoidectomy (Milligan-Morgan), unique risks include rectovaginal fistula (if the posterior vaginal wall is caught) and persistent tenesmus. * **Key Advantage:** Faster recovery and significantly less postoperative pain compared to conventional surgery.

Question 795: A stone in which part of the urinary tract typically causes pain that radiates to the testicle?

A. Distal ureter (Correct Answer)
B. Renal calyx
C. Renal pelvis
D. Upper ureter

Explanation: **Explanation:** The radiation of pain in urolithiasis is determined by the **segmental nerve supply** of the urinary tract. The ureter receives its sensory innervation from spinal segments **T11 to L2**. **Why Distal Ureter is correct:** As a stone descends into the **distal (lower) ureter**, the pain typically radiates to the **scrotum/testicle** in males or the **labia majora** in females. This occurs because the distal ureter is supplied by the **genitofemoral nerve (L1, L2)** and the **ilioinguinal nerve (L1)**. These nerves also provide sensory innervation to the skin of the scrotum and the cremasteric muscle, leading to referred pain in the inguinal region and genitalia. **Analysis of Incorrect Options:** * **Renal Calyx & Pelvis:** Stones here usually cause a dull ache in the **costovertebral angle (flank)**. Pain is localized to the T12-L1 distribution and does not typically radiate to the groin unless the stone moves into the ureter. * **Upper Ureter:** Pain from the upper ureter typically radiates to the **lumbar region and the upper abdomen** (along the distribution of the T11-T12 nerves). **NEET-PG High-Yield Pearls:** 1. **Classic Radiation Pattern:** Pain moves from "Loin to Groin" as the stone moves from the kidney to the bladder. 2. **Mid-Ureteric Stones:** Often mimic **appendicitis** (on the right) or **diverticulitis** (on the left) because the pain radiates to the iliac fossa (McBurney’s point). 3. **Intramural/UVJ Stones:** When the stone is at the Vesicoureteric Junction (UVJ), it causes **bladder irritability**, leading to frequency, urgency, and pain at the tip of the urethra. 4. **Nerve Summary:** Upper ureter (T11-L1); Lower ureter (L1-L2).

Question 796: Which of the following is a nonabsorbable suture?

A. Vicryl
B. Polypropylene (Correct Answer)
C. Catgut
D. PDS

Explanation: **Explanation:** Sutures are broadly classified into **Absorbable** (broken down by the body via hydrolysis or enzymatic digestion) and **Non-absorbable** (remain permanently in the tissue or require manual removal). **Correct Answer: B. Polypropylene (Prolene)** Polypropylene is a synthetic, monofilament, **non-absorbable** suture. In Urology, it is frequently used for vascular anastomoses (e.g., renal artery in transplant) and abdominal wall closure (linea alba) because it maintains high tensile strength indefinitely and has minimal tissue reactivity. **Incorrect Options:** * **A. Vicryl (Polyglactin 910):** A synthetic, braided, **absorbable** suture. It loses most of its tensile strength by 3–4 weeks and is completely absorbed by 60–90 days. * **C. Catgut:** A natural, **absorbable** suture derived from bovine or ovine submucosa. It is absorbed rapidly by enzymatic digestion and is now largely replaced by synthetic sutures due to high tissue reactivity. * **D. PDS (Polydioxanone):** A synthetic, monofilament, **absorbable** suture. It is unique because it provides prolonged tensile strength (up to 6 weeks), making it ideal for slow-healing tissues like the rectus sheath. **High-Yield Clinical Pearls for NEET-PG:** 1. **Urology Rule:** Never use non-absorbable sutures (like Prolene or Silk) inside the urinary tract (lumen of the bladder or ureter) as they act as a **nidus for stone formation**. 2. **Ideal Suture for Urinary Tract:** Vicryl or Monocryl (absorbable) are preferred. 3. **Memory:** Polypropylene has high "plastic memory," meaning it tends to return to its original straight shape, requiring more knots for security. 4. **Fastest absorbing suture:** Plain Catgut. 5. **Longest-acting absorbable suture:** PDS.

Question 797: Extravasated urine following rupture of bulbar urethra collects in all the following regions except?

A. Penis
B. Scrotum
C. Inguinal canal (Correct Answer)
D. Beneath the superficial fascia in the abdominal wall

Explanation: The rupture of the **bulbar urethra** (usually due to a "straddle injury") occurs below the perineal membrane. The extravasated urine is confined by the **Colles' fascia** (the deep layer of the superficial perineal fascia). ### Why the Inguinal Canal is the Correct Answer The **inguinal canal** is a separate anatomical passage containing the spermatic cord/round ligament. While urine can track up the abdominal wall, it does so between the Scarpa’s fascia and the external oblique aponeurosis. It **does not enter the inguinal canal** because the attachments of the fasciae and the presence of the spermatic cord structures prevent entry into this space. ### Why the Other Options are Incorrect The Colles' fascia is continuous with specific layers, directing the flow of urine into the following areas: * **Penis (Option A):** Colles' fascia is continuous with the **Buck’s fascia** and **Dartos fascia** of the penis. * **Scrotum (Option B):** Colles' fascia is continuous with the **Dartos fascia** of the scrotum, leading to scrotal swelling. * **Abdominal Wall (Option D):** At the level of the pubic symphysis, Colles' fascia is continuous with **Scarpa’s fascia** of the anterior abdominal wall. Urine can track upwards as far as the axilla but cannot track into the thighs due to the attachment of Scarpa’s fascia to the **fascia lata** (Holden’s line). ### High-Yield Clinical Pearls for NEET-PG * **Holden’s Line:** The attachment of Scarpa’s fascia to the fascia lata of the thigh, 1 cm below the inguinal ligament. This prevents urine from tracking into the lower limbs. * **Butterfly Hematoma:** A classic sign of perineal extravasation where the collection is limited by the perineal membrane and Colles' fascia. * **Membranous Urethra Rupture:** Usually associated with pelvic fractures; urine extravasates into the **pelvic extraperitoneal space** (retropubic space of Retzius), not the perineum.

Question 798: What is the best prognostic marker of carcinoma of the penis?

A. Age less than 40 years
B. Lesion size less than 2 cm
C. Previous circumcision
D. Absent inguinal lymph node metastasis (Correct Answer)

Explanation: **Explanation:** The prognosis of **Carcinoma Penis** (most commonly Squamous Cell Carcinoma) is primarily dictated by the status of the regional lymph nodes. **Why the correct answer is right:** The presence or absence of **inguinal lymph node metastasis** is the single most important prognostic factor for survival. If the inguinal nodes are negative (N0), the 5-year survival rate is approximately 90-95%. Once nodal metastasis occurs, the survival rate drops significantly (to 30-50% for multiple/bilateral nodes and <15% for pelvic node involvement). The lymphatic spread follows a predictable pattern: from the penis to the superficial inguinal nodes, then to deep inguinal nodes, and finally to pelvic (iliac) nodes. **Analysis of incorrect options:** * **A. Age:** While younger patients may present with more aggressive histological subtypes, age itself is not a primary determinant of long-term survival compared to pathological staging. * **B. Lesion size:** While the T-stage (tumor depth and invasion) is important, a large superficial lesion often has a better prognosis than a small, deeply invasive lesion that has already metastasized to the nodes. * **C. Previous circumcision:** Neonatal circumcision is a **protective factor** that reduces the risk of developing the disease (by preventing phimosis and smegma accumulation), but it does not determine the prognosis once the cancer has already developed. **High-Yield Clinical Pearls for NEET-PG:** 1. **Sentinel Node:** The first node involved is usually the **Sentinal node of Cabanas** (located at the junction of the epigastric and great saphenous veins). 2. **Biopsy Rule:** Never biopsy an enlarged inguinal node first; always biopsy the primary penile lesion. Enlarged nodes are often inflammatory (50%) due to secondary infection of the tumor. 3. **Treatment:** If nodes remain palpable after 4-6 weeks of antibiotics post-primary tumor excision, an **Ilio-inguinal lymph node dissection** is indicated.

Question 799: Which of the following is NOT a feature of membranous urethral injury?

A. Blood at meatus
B. Retention of urine
C. Pelvic fracture
D. All of the above (Correct Answer)

Explanation: **Explanation:** Urethral injuries are broadly classified into **Anterior** (Bulbar and Pendulous) and **Posterior** (Membranous and Prostatic). Membranous urethral injury is a classic example of posterior urethral trauma, typically occurring due to high-energy blunt trauma. **Why "All of the above" is the correct answer:** The question asks for features of membranous urethral injury. In clinical practice, all three listed options are hallmark presentations of this condition: 1. **Pelvic Fracture (Option C):** This is the most common cause of posterior urethral injury. The membranous urethra is fixed to the pubic bone via the puboprostatic ligaments. During a pelvic fracture, the shearing force tears the urethra at the apex of the prostate. 2. **Blood at Meatus (Option A):** This is the single most important clinical sign of urethral injury. It occurs because the urethral lumen is disrupted, allowing blood to track down to the external orifice. 3. **Retention of Urine (Option B):** Due to the complete or partial disruption of the urethral continuity and associated pain/sphincter spasm, the patient is unable to void, leading to a palpable, distended bladder. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Pelvic fracture + Blood at meatus + Inability to void (Retention). * **Digital Rectal Exam (DRE):** May reveal a **"High-riding prostate"** due to the disruption of the puboprostatic ligaments and formation of a pelvic hematoma. * **Gold Standard Investigation:** **Retrograde Urethrogram (RUG)**. This must be performed *before* attempting any urethral catheterization to avoid converting a partial tear into a complete one. * **Management:** Initial management involves a **Suprapubic Cystostomy (SPC)** to divert urine, followed by delayed repair (Urethroplasty). **Note on Question Framing:** If the question asks for the *most common* cause, it is pelvic fracture. If it asks for the *earliest sign*, it is blood at the meatus. Since all three are characteristic features, "All of the above" is the most appropriate choice.

Question 800: Which of the following is NOT a preferred site for planning vascular access for maintenance hemodialysis?

A. Nondominant extremity
B. Upper limb
C. Radiocephalic AV fistula
D. Saphenofemoral fistula (Correct Answer)

Explanation: **Explanation:** The primary goal of vascular access for maintenance hemodialysis is to provide a durable, high-flow system with minimal complications. The **Saphenofemoral fistula** (Option D) is **NOT** a preferred site because lower limb accesses are associated with significantly higher rates of infection, thrombosis, and limb-threatening ischemia compared to upper limb sites. Furthermore, their proximity to the groin increases the risk of surgical site contamination. **Analysis of Options:** * **A. Nondominant extremity:** This is preferred to preserve the patient's quality of life and functionality of their dominant hand during the hours spent in dialysis sessions. * **B. Upper limb:** The upper limb is the gold standard site for access. It has lower infection rates and better patency compared to the lower limb or central venous catheters. * **C. Radiocephalic AV fistula (Brescia-Cimino):** This is the **first-choice** access site. It is the most distal possible site, which preserves proximal veins for future use and has the lowest complication rate. **Clinical Pearls for NEET-PG:** * **Order of preference for AV Fistula (AVF):** Radiocephalic (distal) > Brachiocephalic (proximal) > Brachiobasilic (transposition). * **Rule of 6s for Maturation:** A fistula is ready when it has a flow of >600 mL/min, diameter >6 mm, and is <6 mm deep from the skin, usually evaluated at 6 weeks. * **Steal Syndrome:** A complication where blood is diverted away from the distal extremity; it is more common in proximal (brachial) fistulas than distal ones.

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Renal Cell Carcinoma

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Testicular Tumors

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