Urology Practice Questions

Q: In abdominal surgery, Lembert sutures refer to:

Sero-muscular sutures. **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.

Q: What is the most common tumor of the urinary bladder?

Transitional cell carcinoma. **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.

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

Ureterocele. **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.

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

Distal ureter. **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).

Q: Which of the following is a nonabsorbable suture?

Polypropylene. **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.

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

Inguinal canal. 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.

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

Saphenofemoral fistula. **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.

Question 1

In abdominal surgery, Lembert sutures refer to:

Accepted Answer

Sero-muscular sutures

Answer

Single layer suturing

Answer

All coat intestinal suturing

Answer

Skin suturing

Question 2

What is the most common tumor of the urinary bladder?

Accepted Answer

Transitional cell carcinoma

Answer

Squamous cell carcinoma

Answer

Adenocarcinoma

Answer

Stratified squamous carcinoma

Question 3

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

Accepted Answer

Ureterocele

Answer

Benign Prostatic Hyperplasia (BPH)

Answer

Bladder tumor

Answer

Vesical calculus

Question 4

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

Accepted Answer

Circular cutting stapler

Answer

Linear cutting stapler

Answer

Linear stapler

Answer

Circular stapler

Question 5

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

Accepted Answer

Distal ureter

Answer

Renal calyx

Answer

Renal pelvis

Answer

Upper ureter

Question 6

Which of the following is a nonabsorbable suture?

Accepted Answer

Polypropylene

Answer

Vicryl

Answer

Catgut

Answer

PDS

Question 7

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

Accepted Answer

Inguinal canal

Answer

Penis

Answer

Scrotum

Answer

Beneath the superficial fascia in the abdominal wall

Question 8

What is the best prognostic marker of carcinoma of the penis?

Accepted Answer

Absent inguinal lymph node metastasis

Answer

Age less than 40 years

Answer

Lesion size less than 2 cm

Answer

Previous circumcision

Question 9

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

Accepted Answer

All of the above

Answer

Blood at meatus

Answer

Retention of urine

Answer

Pelvic fracture

Question 10

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

Accepted Answer

Saphenofemoral fistula

Answer

Nondominant extremity

Answer

Upper limb

Answer

Radiocephalic AV fistula

Urology — MCQs

Urology — MCQs

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