Urology Practice Questions

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: Which of the following statements regarding urinary bladder stones is NOT true?

Uric acid stones are typically radiolucent.. The question asks for the statement that is **NOT true**. However, based on standard urological principles, **Option A is actually a true statement**, making the question likely a "negative stem" error or requiring the identification of the most accurate clinical fact. In the context of NEET-PG, understanding the properties of these stones is crucial. **1. Why Option A is the focus:** Uric acid stones are classically **radiolucent** on plain X-ray (KUB) because they are composed of light elements (C, H, N, O) that do not attenuate X-rays. They only become visible on CT scans or if they become "mixed" with calcium oxalate. If this was the intended "correct" answer to a "NOT true" question, it implies a pedagogical error in the question stem; however, for exam purposes, always remember: **Uric Acid = Radiolucent.** **2. Analysis of other options:** * **Option B (True):** Struvite stones (Magnesium Ammonium Phosphate) are "infection stones." They form in alkaline urine caused by **urea-splitting bacteria** like *Proteus* or *Klebsiella*, which produce urease. * **Option C (True):** In developing tropical countries, "endemic bladder stones" are frequently seen in children, often linked to dietary factors (low animal protein, high oxalate intake). * **Option D (True):** The most common cause of bladder stones in adults is **urinary stasis** due to **distal outlet obstruction**, such as Benign Prostatic Hyperplasia (BPH) or urethral strictures [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Most common stone overall:** Calcium Oxalate (Radiopaque). * **Staghorn Calculi:** Usually composed of Struvite; associated with *Proteus* species. * **Imaging Gold Standard:** Non-contrast CT (NCCT) KUB (detects almost all stones, including uric acid). * **Cystine Stones:** Described as having a "ground glass" appearance and are hexagonal on microscopy.

Q: Which of the following is NOT a cause of bladder cancer?

Alcohol. **Explanation:** The correct answer is **Alcohol**. While alcohol is a known risk factor for several malignancies (such as esophageal, hepatic, and breast cancer), it has **no proven epidemiological link** to the development of bladder cancer. **Analysis of Options:** * **Naphthylamine exposure (Option B):** This is a classic occupational risk factor. Aromatic amines (like 2-Naphthylamine and benzidine) used in the dye, rubber, and leather industries are potent bladder carcinogens. They are metabolized in the liver and excreted in the urine, where they induce DNA damage in the urothelium. * **Cigarette smoking (Option C):** This is the **most common** risk factor for bladder cancer (responsible for ~50% of cases). Tobacco contains alpha and beta-naphthylamine and nitrosamines. The risk is proportional to the duration and intensity of smoking. * **Schistosoma hematobium (Option D):** This parasite is a major cause of bladder cancer in endemic areas (e.g., Egypt). Chronic irritation and inflammation lead to **Squamous Cell Carcinoma (SCC)**, unlike smoking which typically causes Transitional Cell Carcinoma (TCC). **High-Yield Clinical Pearls for NEET-PG:** 1. **Most common type:** In the West, it is **Transitional Cell Carcinoma (Urothelial)**; in areas with endemic Schistosomiasis, it is **Squamous Cell Carcinoma**. 2. **Drugs:** Long-term use of **Cyclophosphamide** (metabolite Acrolein) and **Phenacetin** abuse are significant risk factors. 3. **Protective factor:** High fluid intake is generally considered protective as it dilutes carcinogens and increases voiding frequency. 4. **Presentation:** The classic presentation is **painless gross hematuria** in an elderly male.

Question 1

Seminoma is best treated by?

Accepted Answer

Radiation and surgery

Answer

Radiation alone

Answer

Radiation and chemotherapy

Answer

Surgery alone

Question 2

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 3

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 4

Which of the following is a radiolucent stone?

Accepted Answer

Uric acid calculus

Answer

Oxalate calculus

Answer

Phosphate calculus

Answer

Cysteine calculi

Question 5

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 6

What is the treatment of choice for ureterocele?

Accepted Answer

Ureteric reimplantation

Answer

Laser ablation

Answer

Antibiotics and observation

Answer

Urinary diversion

Question 7

Which of the following statements regarding urinary bladder stones is NOT true?

Accepted Answer

Uric acid stones are typically radiolucent.

Answer

Struvite (infection) stones are often due to urea-splitting bacteria.

Answer

Bladder stones are common in pediatric patients in tropical regions.

Answer

Stones commonly form due to distal passage obstruction.

Question 8

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.

Question 9

Strangury is defined as:

Accepted Answer

Painful, frequent attempts at micturition with only a small quantity of urine passed each time

Answer

Renal colic

Answer

Pain due to a twisted ovarian cyst

Answer

Biliary colic

Question 10

Which of the following is NOT a cause of bladder cancer?

Accepted Answer

Alcohol

Answer

Naphthylamine exposure

Answer

Cigarette smoking

Answer

Schistosoma hematobium

Urology — MCQs

Urology — MCQs

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