Urology Practice Questions

Q: Thimble bladder is seen in:

Tuberculosis. **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.

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

Testicular tumour. **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."

Q: It is true of carcinoma of the urinary bladder that:

It usually occurs in childhood. **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.

Q: Which of the following is a radiolucent stone?

Uric acid calculus. **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).

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

Should be immediate and include the asymptomatic side.. **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.

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

Triple phosphate. **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 1

Thimble bladder is seen in:

Accepted Answer

Tuberculosis

Answer

Diverticulae

Answer

Bladder stones

Answer

Schistosomiasis

Question 2

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

Accepted Answer

Testicular tumour

Answer

Nephroma

Answer

Hepatic malignancy

Answer

Penile malignancy

Question 3

Seminoma is best treated by?

Accepted Answer

Radiation and surgery

Answer

Radiation alone

Answer

Radiation and chemotherapy

Answer

Surgery alone

Question 4

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

Accepted Answer

Contracture of the bladder neck

Answer

Benign enlargement of the prostate

Answer

Fibrous prostate

Answer

Stricture of the urethra

Question 5

It is true of carcinoma of the urinary bladder that:

Accepted Answer

It usually occurs in childhood

Answer

Occurs more often in aniline dye workers

Answer

It is located most frequently in the trigone

Answer

Papillary formation is rare

Question 6

Which of the following is a radiolucent stone?

Accepted Answer

Uric acid calculus

Answer

Oxalate calculus

Answer

Phosphate calculus

Answer

Cysteine calculi

Question 7

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

Accepted Answer

Should be immediate and include the asymptomatic side.

Answer

Can be delayed 24 hours and limited to the affected side.

Answer

Can be delayed but should include the asymptomatic side.

Answer

Should be immediate and limited to the affected side.

Question 8

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

Accepted Answer

Triple phosphate

Answer

Uric acid

Answer

Calcium oxalate

Answer

Xanthine

Question 9

What is the treatment of choice for ureterocele?

Accepted Answer

Ureteric reimplantation

Answer

Laser ablation

Answer

Antibiotics and observation

Answer

Urinary diversion

Question 10

What is the primary management for an intraperitoneal bladder rupture?

Accepted Answer

Laparotomy is necessary.

Answer

Antegrade cystogram is required.

Answer

Simple catheter drainage is the treatment.

Answer

Conservative management is indicated.

Urology — MCQs

Urology — MCQs

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