Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 501: Thimble bladder is seen in:

A. Diverticulae
B. Bladder stones
C. Schistosomiasis
D. Tuberculosis (Correct Answer)

Explanation: **Explanation:** **Genitourinary Tuberculosis (GUTB)** is the correct answer. A **"Thimble Bladder"** (also known as a systolic bladder) is a classic radiological and pathological finding in chronic or end-stage renal tuberculosis. * **Mechanism:** Chronic tuberculous infection leads to extensive transmural inflammation and ulceration of the bladder wall. As these ulcers heal, they undergo progressive **fibrosis and cicatrization**. This results in a thick-walled, non-compliant bladder with a severely reduced capacity (often <50 ml), resembling the shape of a tailor’s thimble. * **Clinical Correlation:** This leads to extreme frequency of micturition and "autonephrectomy" if the ureterovesical junction is involved. **Why other options are incorrect:** * **Diverticulae:** These are outpouchings of the bladder mucosa through the muscularis. While they change the bladder's contour, they do not cause global fibrosis or the characteristic "thimble" appearance. * **Bladder Stones:** These cause mucosal irritation and "Hutchinson’s posture" (leaning forward to void), but they do not lead to the permanent fibrotic contraction seen in TB. * **Schistosomiasis:** While it causes bladder calcification (the characteristic **"fetal head" appearance** or "bladder calcification" on X-ray), it typically leads to a dilated, atonic bladder or squamous cell carcinoma, rather than a contracted thimble bladder. **High-Yield Clinical Pearls for NEET-PG:** * **Golf-hole ureter:** Seen in GUTB due to fibrosis and shortening of the ureter. * **Putty kidney:** Radiographic appearance of renal parenchymal calcification in TB. * **Sterile Pyuria:** The hallmark laboratory finding in GUTB (pus cells in urine but negative routine culture). * **Treatment:** If the bladder capacity is <100ml (Thimble bladder), medical therapy alone is insufficient; **Augmentation Cystoplasty** is usually required.

Question 502: A 25-year-old man presents with hydrocele on the left side. What associated condition could be present?

A. Nephroma
B. Hepatic malignancy
C. Testicular tumour (Correct Answer)
D. Penile malignancy

Explanation: **Explanation:** The correct answer is **Testicular tumour**. In a young male presenting with a hydrocele, it is crucial to differentiate between a primary (idiopathic) hydrocele and a **secondary (symptomatic) hydrocele**. A secondary hydrocele occurs as a reaction to underlying pathology in the testis or epididymis. Approximately **5-10% of testicular tumors** present with a reactive hydrocele due to irritation of the tunica vaginalis or lymphatic obstruction by the tumor. In clinical practice, if the testis cannot be clearly palpated through the fluid, an urgent scrotal ultrasound is mandatory to rule out malignancy. **Analysis of Incorrect Options:** * **Nephroma (Renal tumors):** While left-sided renal tumors can cause a **varicocele** (due to obstruction of the left testicular vein as it enters the left renal vein), they do not typically cause a hydrocele. * **Hepatic malignancy:** Liver disease or malignancy may cause generalized edema or ascites (which can track into the scrotum via a patent processus vaginalis), but it is not a specific cause of a localized unilateral hydrocele. * **Penile malignancy:** This typically metastasizes to the inguinal lymph nodes. It does not involve the tunica vaginalis or cause fluid accumulation around the testis. **NEET-PG Clinical Pearls:** * **Lord’s Procedure:** Indicated for thin-walled primary hydroceles (plication of the sac). * **Jaboulay’s Procedure:** Indicated for large, thick-walled hydroceles (eversion of the sac). * **Transillumination Test:** The classic physical exam finding for hydrocele; however, it may be negative if the sac is very thick or if a tumor is present. * **Rule of Thumb:** Any sudden onset hydrocele in a young man is a "testicular tumor until proven otherwise."

Question 503: Seminoma is best treated by?

A. Radiation alone
B. Radiation and surgery (Correct Answer)
C. Radiation and chemotherapy
D. Surgery alone

Explanation: **Explanation:** The management of **Seminoma**, a germ cell tumor of the testis, is rooted in two primary characteristics: its high sensitivity to radiation and its predictable lymphatic spread. **Why "Radiation and Surgery" is correct:** The standard primary treatment for any testicular tumor, including seminoma, is **High Inguinal Orchidectomy** (Surgery). This serves both a therapeutic and diagnostic purpose. Following surgery, seminomas are uniquely **exquisitely radiosensitive**. For Stage I and low-volume Stage II disease, adjuvant **Radiotherapy** to the para-aortic lymph nodes is the classic treatment of choice to prevent recurrence, as these tumors spread primarily via the lymphatic route. Therefore, the combination of surgery (to remove the primary focus) and radiation (to treat the nodal basins) is the definitive management. **Analysis of Incorrect Options:** * **A. Radiation alone:** Surgery (Orchidectomy) is mandatory for histopathological diagnosis and to remove the primary tumor, which has a "blood-testis barrier" that may limit the efficacy of non-surgical treatments. * **C. Radiation and chemotherapy:** While chemotherapy (e.g., Carboplatin or BEP regimen) is used for advanced/metastatic seminoma, surgery remains the first step. Radiation and chemotherapy are rarely used together as primary treatment due to overlapping toxicities. * **D. Surgery alone:** While surgery removes the primary tumor, seminomas have a high risk of occult micrometastasis to retroperitoneal nodes. Without adjuvant therapy (Radiation or single-agent Carboplatin), the recurrence rate is significantly higher. **High-Yield Clinical Pearls for NEET-PG:** * **Tumor Marker:** Seminomas are typically associated with elevated **hCG** (in 10-15% of cases) but **never** with elevated Alpha-Fetoprotein (AFP). If AFP is raised, it is a non-seminomatous germ cell tumor (NSGCT). * **Most Common:** Seminoma is the most common single histology of testicular germ cell tumors. * **Lymphatic Spread:** The first site of spread is the **Para-aortic lymph nodes** (at the level of L2). * **Best Prognosis:** Among all testicular tumors, seminoma has the best overall prognosis due to its predictable spread and sensitivity to treatment.

Question 504: What is the commonest cause for pulsion diverticulum of the urinary bladder?

A. Benign enlargement of the prostate
B. Fibrous prostate
C. Contracture of the bladder neck (Correct Answer)
D. Stricture of the urethra

Explanation: ### Explanation **Concept Overview:** A **pulsion diverticulum** of the bladder is an outpouching of the mucosa through the detrusor muscle fibers. It occurs due to increased intravesical pressure caused by **Bladder Outlet Obstruction (BOO)**. When the bladder contracts against high resistance, the mucosa herniates through the weakest points of the muscular wall (usually lateral to the ureteric orifices). **Why Option C is Correct:** While all the listed options cause bladder outlet obstruction, **Contracture of the Bladder Neck (Marion’s Disease)** is classically cited in surgical literature (e.g., Bailey & Love) as the most common cause of a *pulsion* diverticulum. This is because bladder neck obstruction creates a high-pressure system that is more localized and chronic compared to other forms of obstruction, leading to significant trabeculation, sacculation, and eventual diverticula formation. **Analysis of Incorrect Options:** * **A & B (BPH and Fibrous Prostate):** While Benign Prostatic Hyperplasia (BPH) is the most common cause of BOO in elderly males, it more frequently leads to generalized bladder wall hypertrophy and trabeculation. While it *can* cause diverticula, it is statistically less specifically associated with the classic "pulsion" mechanism than bladder neck contracture in exam-based contexts. * **D (Stricture of the Urethra):** Urethral strictures cause obstruction distal to the bladder. While they increase intravesical pressure, the pressure is often dissipated over a longer segment, making diverticula formation less common than with proximal (neck) obstructions. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Most bladder diverticula occur at the **ureterovesical junction** (Hutch diverticulum). * **Complications:** Stasis of urine within the diverticulum leads to **recurrent UTIs, calculi formation**, and an increased risk of **Squamous Cell Carcinoma** (due to chronic irritation). * **Diagnosis:** The gold standard for visualizing the diverticulum and the degree of obstruction is **Micturating Cystourethrogram (MCU)** and Cystoscopy. * **Management:** Treatment involves relieving the primary obstruction (e.g., Bladder neck incision) and diverticulectomy if the diverticulum is large or symptomatic.

Question 505: It is true of carcinoma of the urinary bladder that:

A. It usually occurs in childhood (Correct Answer)
B. Occurs more often in aniline dye workers
C. It is located most frequently in the trigone
D. Papillary formation is rare

Explanation: **Explanation:** Carcinoma of the urinary bladder is a significant topic in surgical oncology. However, there appears to be a discrepancy in the provided key: **Option B is the clinically correct statement**, while Option A is factually incorrect for bladder cancer. **1. Why Option B is the standard correct concept:** Bladder cancer is strongly associated with occupational exposure. **Aniline dyes** (containing aromatic amines like benzidine and 2-naphthylamine) are classic risk factors. These chemicals are metabolized in the liver and excreted in the urine, where they act as potent carcinogens on the urothelium. **2. Analysis of Options:** * **Option A (Incorrect):** Bladder cancer is a disease of the **elderly**, typically occurring in the 6th or 7th decade of life. It is extremely rare in childhood (where Rhabdomyosarcoma is the more common bladder malignancy). * **Option C (Incorrect):** While it can occur anywhere, the most frequent site is the **lateral walls**, followed by the posterior wall and then the trigone. * **Option D (Incorrect):** **Papillary formation is very common.** Approximately 70-80% of bladder cancers present as papillary transitional cell carcinomas (TCC). **Clinical Pearls for NEET-PG:** * **Most common type:** Transitional Cell Carcinoma (Urothelial Carcinoma) (>90%). * **Most common symptom:** Painless gross hematuria. * **Risk Factors:** Smoking (most common), Schistosomiasis (associated specifically with **Squamous Cell Carcinoma**), and drugs like Cyclophosphamide. * **Gold Standard Investigation:** Cystoscopy with biopsy. * **Staging:** The TNM system focuses on muscle invasion (T2 and above), which dictates the shift from TURBT to Radical Cystectomy.

Question 506: Which of the following is a radiolucent stone?

A. Oxalate calculus
B. Phosphate calculus
C. Uric acid calculus (Correct Answer)
D. Cysteine calculi

Explanation: **Explanation:** The visibility of a urinary stone on a plain X-ray (KUB) depends on its atomic number and density. Stones containing calcium have high electron density, making them **radiopaque** (visible), while those lacking heavy atoms are **radiolucent** (invisible). **Why Uric Acid is the Correct Answer:** Uric acid calculi are composed of carbon, nitrogen, and oxygen—elements with low atomic numbers. Because they lack calcium or other heavy minerals, they do not attenuate X-rays and appear **radiolucent** on plain films. They are, however, visible on non-contrast CT (NCCT) and appear as filling defects on intravenous pyelography (IVP). **Analysis of Incorrect Options:** * **Oxalate Calculus (Calcium Oxalate):** These are the most common urinary stones. Due to their high calcium content, they are **extremely radiopaque** and easily seen on X-ray. * **Phosphate Calculus (Struvite/Triple Phosphate):** These contain calcium, magnesium, and ammonium phosphate. They are **radiopaque** and often form large "staghorn" calculi. * **Cysteine Calculi:** While they lack calcium, they contain sulfur atoms. Sulfur has a higher atomic number than the elements in uric acid, making these stones **semi-opaque** (often described as having a "ground-glass" appearance). **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic for Radiolucent Stones (PURE):** **P**u**R**ine (Uric acid), **U**rate (Ammonium urate), **R**etonavir, **E**ndinavir (Indinavir), and **X**anthine. * **Gold Standard Investigation:** Non-contrast CT (NCCT) is the investigation of choice as it detects *all* stones except Indinavir stones. * **Management:** Uric acid stones are unique because they can often be dissolved via **medical dissolution therapy** (alkalinization of urine to pH > 6.5).

Question 507: If torsion of the testicle is suspected, what is the recommended surgical management?

A. Can be delayed 24 hours and limited to the affected side.
B. Can be delayed but should include the asymptomatic side.
C. Should be immediate and limited to the affected side.
D. Should be immediate and include the asymptomatic side. (Correct Answer)

Explanation: **Explanation:** Testicular torsion is a surgical emergency caused by the twisting of the spermatic cord, leading to venous occlusion and subsequent arterial compromise. **Why Option D is correct:** 1. **Immediacy:** The "Golden Period" for testicular salvage is within **6 hours**. Delay beyond this leads to irreversible ischemia and necrosis. 2. **Bilateral Fixation:** The underlying anatomical defect, most commonly the **"Bell-clapper deformity"** (high attachment of the tunica vaginalis), is typically a **bilateral** congenital anomaly. Therefore, the contralateral (asymptomatic) testis is at high risk for future torsion and must be fixed (orchidopexy) during the same procedure. **Analysis of Incorrect Options:** * **Options A & B:** Delaying surgery for 24 hours is incorrect as it guarantees testicular loss. Salvage rates drop to <10% after 24 hours. * **Option C:** Limiting surgery to the affected side is dangerous. Because the anatomical predisposition is usually bilateral, the patient remains at significant risk for torsion of the remaining healthy testis if it is not fixed. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Primarily clinical. **Prehn’s sign** is negative (pain is not relieved by elevation), and the **Cremasteric reflex** is characteristically absent. * **Investigation of Choice:** Color Doppler Ultrasound (shows decreased or absent blood flow). However, surgery should not be delayed for imaging if clinical suspicion is high. * **Surgical Procedure:** Orchiopexy (fixation) using non-absorbable sutures. If the testis is gangrenous, an orchidectomy is performed, but the contralateral side **must still be fixed.** * **Manual Detorsion:** Should be done "open-book" (medial to lateral rotation). This is only a temporizing measure before definitive surgery.

Question 508: Renal calculi associated with Proteus infection are typically composed of which substance?

A. Uric acid
B. Triple phosphate (Correct Answer)
C. Calcium oxalate
D. Xanthine

Explanation: **Explanation:** **Triple phosphate stones** (also known as **Struvite** or **Staghorn calculi**) are the hallmark of infections caused by urea-splitting organisms, most notably ***Proteus mirabilis***. **Why Triple Phosphate is Correct:** *Proteus* produces the enzyme **urease**, which hydrolyzes urea into ammonia and carbon dioxide. This process increases the urinary pH (alkaline urine, pH > 7.2). In this alkaline environment, the solubility of magnesium, ammonium, and phosphate decreases, leading to the precipitation of **Magnesium Ammonium Phosphate** (Triple Phosphate). These stones often grow rapidly to fill the renal pelvis and calyces, forming a "Staghorn" appearance. **Why Other Options are Incorrect:** * **A. Uric acid:** These stones form in **acidic urine** (low pH). They are radiolucent on X-ray and are associated with gout or high cell turnover. * **C. Calcium oxalate:** This is the **most common** type of renal stone overall. Their formation is generally independent of infection and is often linked to hypercalciuria or hyperoxaluria. * **D. Xanthine:** These are rare stones caused by a genetic deficiency of xanthine oxidase or the use of allopurinol. **High-Yield Clinical Pearls for NEET-PG:** * **Composition:** Triple phosphate stones consist of Magnesium Ammonium Phosphate and Calcium Phosphate (Carbonate apatite). * **Radiology:** They are **radio-opaque** (though less dense than calcium oxalate) and typically present as a **Staghorn calculus** on KUB X-ray. * **Microscopy:** Crystals appear as **"Coffin-lid"** shaped. * **Management:** Since the stone itself acts as a reservoir for bacteria, complete surgical removal (e.g., PCNL) is usually necessary to eradicate the infection.

Question 509: What is the treatment of choice for ureterocele?

A. Ureteric reimplantation (Correct Answer)
B. Laser ablation
C. Antibiotics and observation
D. Urinary diversion

Explanation: **Explanation:** A **ureterocele** is a cystic dilatation of the terminal portion of the ureter. The primary goal of treatment is to relieve obstruction and prevent vesicoureteral reflux (VUR). **Why Ureteric Reimplantation is the Correct Answer:** Ureteric reimplantation (specifically **Cohen’s or Leadbetter-Politano technique**) is considered the definitive treatment of choice, especially in the intravesical (orthotopic) type. It addresses both the obstructive component by excising the cyst and the reflux component by creating a new anti-reflux tunnel for the ureter. In cases associated with a duplex system (ectopic ureterocele), reimplantation ensures functional drainage of the upper pole while maintaining bladder integrity. **Analysis of Incorrect Options:** * **B. Laser ablation:** While endoscopic incision (using cold knife or laser) is a common initial emergency procedure to decompress an obstructed system, it often results in iatrogenic vesicoureteral reflux, necessitating a secondary definitive surgery like reimplantation. * **C. Antibiotics and observation:** This is only supportive management to prevent/treat UTIs. It does not correct the anatomical obstruction, which can lead to progressive hydronephrosis and renal scarring. * **D. Urinary diversion:** This is a radical procedure (e.g., cutaneous ureterostomy) reserved for complex cases with severe sepsis or poor renal function where the patient cannot tolerate definitive reconstruction. It is not the standard "treatment of choice." **High-Yield Clinical Pearls for NEET-PG:** * **Classification:** *Orthotopic* (within the bladder trigone, usually in adults) vs. *Ectopic* (at the bladder neck/urethra, usually in children). * **Association:** Most pediatric ureteroceles are associated with the **upper pole** of a duplex collecting system (**Weigert-Meyer Law**). * **Radiology:** Classic **"Cobra-head"** or **"Adder-head"** appearance on Intravenous Urogram (IVU) due to a radiolucent halo around the dilated ureter.

Question 510: What is the primary management for an intraperitoneal bladder rupture?

A. Antegrade cystogram is required.
B. Laparotomy is necessary. (Correct Answer)
C. Simple catheter drainage is the treatment.
D. Conservative management is indicated.

Explanation: **Explanation:** Bladder rupture is a common consequence of blunt abdominal trauma, typically associated with pelvic fractures. The management depends entirely on the anatomical location of the injury: **Extraperitoneal** (more common) or **Intraperitoneal**. **Why Laparotomy is the Correct Answer:** An **intraperitoneal rupture** occurs when a full bladder is subjected to a direct blow, causing a burst-like injury at the dome (the weakest part). This leads to the leakage of sterile urine into the peritoneal cavity. If left untreated, this results in chemical peritonitis, followed by bacterial peritonitis and metabolic derangements (e.g., uremia due to peritoneal absorption). Therefore, **immediate surgical exploration (laparotomy)**, formal repair of the bladder defect with absorbable sutures, and peritoneal lavage are mandatory. **Analysis of Incorrect Options:** * **Option A:** An **antegrade cystogram** is not the diagnostic modality of choice. The gold standard for diagnosis is a **Retrograde Cystogram** (showing "sunburst" appearance or contrast among bowel loops). * **Option C & D:** Simple catheter drainage or conservative management is the standard treatment for **extraperitoneal** ruptures (where contrast shows a "flame-shaped" appearance). Intraperitoneal ruptures will not heal with catheterization alone because the continuous leak into the peritoneum prevents closure. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Gross hematuria, inability to void, and suprapubic pain/tenderness following trauma. * **Diagnostic Gold Standard:** Retrograde Cystography (requires at least 300-350 ml of contrast). * **Mechanism:** Intraperitoneal = Direct blow to a full bladder; Extraperitoneal = Associated with pelvic fractures (shearing forces). * **Management Rule:** Intraperitoneal = **Surgery**; Extraperitoneal = **Catheterization** (unless there is bone protruding into the bladder or concomitant rectal/vaginal injury).

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Renal Cell Carcinoma

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Testicular Tumors

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Urology — MCQs

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