Urology — MCQs

A 50-year-old male presented to the ER with complaints of inability to pass urine after a recent accident. On examination, he has a scrotal hematoma, blood at the urethral meatus, and a high-riding prostate. A retrograde urethrogram has been performed. What should be the next step in the management of the patient?

Q705Easy

Proteus organisms are known to cause which type of kidney stones?

Q706Medium

Which of the following statements is true regarding the management of a patient with hematuria diagnosed to have Stage II Transitional Cell Carcinoma of the bladder?

Q707Medium

Urinary catheterization is indicated in cases of acute retention of urine, except in which of the following conditions?

Q708Easy

Magnesium-ammonium phosphate stones are usually secondary to urinary tract infection with which of the following organisms?

Q709Easy

All of the following can be seen in hypernephroma, except:

Q710Easy

Which of the following is true about transitional cell carcinoma of the urinary bladder?

Urology Indian Medical PG Practice Questions and MCQs

Question 701: A 23-year-old male known to have sickle cell anemia presents to the emergency department with a painful erection that started 3 hours ago. What is this condition called?

A. Balanitis
B. Hypospadias
C. Peyronie disease
D. Priapism (Correct Answer)

Explanation: **Explanation:** The clinical presentation of a prolonged, painful erection (lasting >4 hours) in a patient with sickle cell anemia is a classic description of **Priapism**. **1. Why Priapism is correct:** Priapism is a urological emergency characterized by a persistent erection unrelated to sexual stimulation. In patients with **Sickle Cell Anemia**, it is typically the **Ischemic (Low-flow)** type. The underlying mechanism involves the sickling of red blood cells within the corpora cavernosa, leading to venous stasis, outflow obstruction, and subsequent hypoxia and acidosis within the penile tissue. **2. Why the other options are incorrect:** * **Balanitis:** This refers to the inflammation of the glans penis, usually due to infection (fungal/bacterial) or poor hygiene. It presents with redness, itching, and discharge, not a persistent erection. * **Hypospadias:** A congenital anomaly where the urethral meatus opens on the ventral aspect of the penis. It is a structural defect present from birth. * **Peyronie Disease:** A condition involving the formation of fibrous plaques in the tunica albuginea, leading to penile curvature and painful erections during intercourse, but not a continuous, spontaneous state of tumescence. **Clinical Pearls for NEET-PG:** * **Ischemic Priapism** is a "compartment syndrome" of the penis. Blood gas analysis of the aspirate shows **low pO2, high pCO2, and low pH**. * **Management:** Initial steps include hydration and analgesia. Definitive treatment involves **aspiration of blood** followed by intracavernosal injection of alpha-agonists (e.g., **Phenylephrine**). * If conservative measures fail, surgical shunts (e.g., Winter’s or Quackels shunt) are performed. * **Stuttering Priapism:** Recurrent, short-lived episodes common in sickle cell patients; often managed with hormonal therapy (GnRH analogs) or PDE5 inhibitors (prophylactically).

Question 702: Maximum chances of ureteric injury are associated with which gynecological procedure?

A. Total abdominal hysterectomy (TAH)
B. Wertheim hysterectomy (Correct Answer)
C. Anterior colporrhaphy
D. Vaginal hysterectomy

Explanation: **Explanation:** The ureter is most vulnerable to injury during gynecological surgeries due to its close anatomical proximity to the uterus and cervix. Among the listed options, **Wertheim hysterectomy (Radical Hysterectomy)** carries the highest risk of ureteric injury. **Why Wertheim Hysterectomy is the Correct Answer:** A Wertheim hysterectomy is performed for cervical cancer and involves extensive dissection. The risk is highest here because: 1. **Ureteric Tunneling:** The ureter must be completely dissected and "unroofed" from the vesicouterine ligament (ureteric tunnel) to allow for the removal of the parametrium. 2. **Devascularization:** Extensive dissection can lead to ischemia of the ureteric wall, resulting in delayed ureterovaginal fistulas. 3. **Anatomical Distortion:** Malignancy often distorts tissue planes, making identification difficult. **Analysis of Incorrect Options:** * **Total Abdominal Hysterectomy (TAH):** While TAH is the most *common* cause of ureteric injury in absolute numbers (due to the high volume of procedures performed), the *percentage risk* per procedure is significantly lower than in radical surgery. * **Vaginal Hysterectomy:** The risk is lower as the ureters are generally displaced laterally when the uterus is pulled downwards, though injury can still occur during the clamping of the uterine arteries. * **Anterior Colporrhaphy:** This procedure involves the vaginal wall and bladder base; while bladder injury is a risk, ureteric injury is rare. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of injury:** At the level of the **Ischial Spine** (where the ureter passes under the uterine artery—"Water under the bridge"). * **Second most common site:** The pelvic brim, during ligation of the infundibulopelvic ligament. * **Most common cause of ureteric injury overall:** Gynecological surgery (approx. 50-75% of all iatrogenic ureteric injuries). * **Intraoperative Identification:** If injury is suspected, IV indigo carmine or methylene blue can be used to check for leaks.

Question 703: Subcapsular orchiectomy is done for cancer of?

A. Testes
B. Prostate (Correct Answer)
C. Penis
D. Urethra

Explanation: **Explanation:** **Subcapsular orchiectomy** (also known as Riba’s operation) is a surgical procedure where the androgen-producing glandular tissue (the parenchyma) is removed while leaving the tunica albuginea and epididymis intact. **Why Prostate Cancer is the Correct Answer:** Prostate cancer is an **androgen-dependent tumor**. The primary goal of treatment in metastatic or advanced cases is **Androgen Deprivation Therapy (ADT)**. Since 95% of testosterone is produced by the Leydig cells in the testes, a bilateral orchiectomy serves as "surgical castration," rapidly reducing serum testosterone to castrate levels (<50 ng/dL). The subcapsular technique is preferred over total orchiectomy for prostate cancer because it is **psychologically less traumatic** for the patient, as the scrotum does not feel entirely empty. **Why Other Options are Incorrect:** * **Testicular Cancer:** The standard of care is **Radical Inguinal Orchiectomy**. A subcapsular approach is contraindicated because it violates the testicular tunics, risking local tumor spillage and altering the lymphatic drainage. * **Penis & Urethra Cancer:** These malignancies are not primarily driven by testosterone. Treatment usually involves local excision, partial/total penectomy, and lymph node dissection, rather than hormonal manipulation via orchiectomy. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard for ADT:** While LHRH agonists (e.g., Leuprolide) are common, bilateral orchiectomy remains the "gold standard" for rapid testosterone depletion. * **Indication:** Primarily used for **Metastatic Prostate Cancer (Stage D)** or as palliative care for bone pain. * **Comparison:** Subcapsular orchiectomy is as effective as total orchiectomy in lowering testosterone but offers a better cosmetic/psychological outcome.

Question 704: A 50-year-old male presented to the ER with complaints of inability to pass urine after a recent accident. On examination, he has a scrotal hematoma, blood at the urethral meatus, and a high-riding prostate. A retrograde urethrogram has been performed. What should be the next step in the management of the patient?

A. Foley's catheterization (Correct Answer)
B. Immediate surgical repair of the urethra
C. Diuretic to increase urine output
D. Conservative management

Explanation: ### Explanation The clinical presentation of **blood at the urethral meatus**, **high-riding prostate**, and **scrotal hematoma** following trauma is classic for a **Posterior Urethral Injury** (typically associated with pelvic fractures). **1. Why Foley’s Catheterization is the Correct Next Step:** In the management of suspected urethral injury, the gold standard diagnostic test is a **Retrograde Urethrogram (RGU)**. The question states that the RGU has already been performed. * If the RGU shows a **partial tear**, a single gentle attempt at Foley’s catheterization by an experienced urologist is indicated. * If the RGU shows a **complete transection**, a Suprapubic Cystostomy (SPC) is usually preferred. * However, in the context of standard NEET-PG protocols and Advanced Trauma Life Support (ATLS) guidelines, once the urethral integrity is assessed via RGU, establishing bladder drainage is the priority. In many clinical scenarios, if the RGU allows, a Foley catheter acts as a stent for healing in partial tears. **2. Why Other Options are Incorrect:** * **B. Immediate surgical repair:** Primary urethroplasty is contraindicated in the acute phase due to the high risk of impotence and incontinence. Management is usually delayed (6–12 weeks). * **C. Diuretic:** Increasing urine output in a patient with a disrupted urethra and urinary retention will worsen the extravasation of urine into the pelvic/scrotal tissues. * **D. Conservative management:** Urinary retention requires active intervention to prevent bladder rupture and renal dysfunction. **Clinical Pearls for NEET-PG:** * **Triad of Urethral Injury:** Blood at meatus, inability to void, and palpable distended bladder. * **Posterior Urethra (Membranous):** Associated with pelvic fractures; presents with a "high-riding prostate." * **Anterior Urethra (Bulbar):** Associated with "straddle injuries"; presents with a "butterfly hematoma." * **Golden Rule:** Never insert a Foley catheter in a trauma patient with blood at the meatus without first performing an RGU.

Question 705: Proteus organisms are known to cause which type of kidney stones?

A. Struvite stones (Correct Answer)
B. Calcium oxalate stones
C. Cystine stones
D. Xanthine stones

Explanation: **Explanation:** The correct answer is **Struvite stones (Option A)**. **Mechanism:** *Proteus* species (along with *Klebsiella*, *Pseudomonas*, and *Staphylococcus*) are **urease-producing organisms**. The enzyme urease hydrolyzes urea into ammonia and carbon dioxide ($NH_2CONH_2 + H_2O \rightarrow 2NH_3 + CO_2$). The resulting ammonia increases the urinary pH, making it **alkaline** (pH > 7.2). In this alkaline environment, phosphate, magnesium, and ammonium ions precipitate to form **Struvite** (Magnesium Ammonium Phosphate) and carbonate apatite stones. **Analysis of Incorrect Options:** * **B. Calcium oxalate stones:** These are the most common type of kidney stones globally. They are typically associated with hypercalciuria or hyperoxaluria and usually form in acidic or neutral urine, not due to urea-splitting infections. * **C. Cystine stones:** These occur due to an autosomal recessive defect in the transport of dibasic amino acids (COLA: Cystine, Ornithine, Lysine, Arginine). They form in **acidic urine** and have a characteristic hexagonal shape. * **D. Xanthine stones:** These are rare and typically result from a genetic deficiency of the enzyme xanthine oxidase or the use of allopurinol. **High-Yield Clinical Pearls for NEET-PG:** 1. **Staghorn Calculi:** Struvite stones are the most common cause of large, branched "staghorn" calculi that fill the renal pelvis and calyces. 2. **Radiopacity:** Struvite stones are **radio-opaque** (though less dense than calcium oxalate). 3. **Microscopy:** On urine microscopy, struvite crystals appear as **"Coffin-lid"** shaped crystals. 4. **Treatment:** Management often requires complete surgical removal (e.g., PCNL) because the stones harbor bacteria within their matrix, leading to recurrent infections if any fragments remain.

Question 706: Which of the following statements is true regarding the management of a patient with hematuria diagnosed to have Stage II Transitional Cell Carcinoma of the bladder?

A. Cystoscopic fulguration is the standard treatment.
B. There is a 70% chance of requiring cystectomy within 5 years after transurethral resection. (Correct Answer)
C. History of smoking is not a risk factor.
D. There is no role for chemotherapy.

Explanation: **Explanation:** The management of bladder cancer is primarily determined by whether the tumor is **Non-Muscle Invasive (NMIBC)** or **Muscle Invasive (MIBC)**. 1. **Why Option B is Correct:** Stage II Transitional Cell Carcinoma (TCC) corresponds to **T2 disease**, meaning the tumor has invaded the **muscularis propria**. For muscle-invasive bladder cancer, a simple Transurethral Resection of Bladder Tumor (TURBT) is insufficient for cure. Statistics show that if these patients are treated with TURBT alone, approximately **70-80% will progress or have persistent disease** requiring a radical cystectomy within 5 years to prevent metastasis and death. Radical cystectomy with pelvic lymph node dissection is the gold standard for Stage II. 2. **Why Other Options are Incorrect:** * **Option A:** Cystoscopic fulguration or TURBT is the standard for Stage 0 (Ta/Tis) or Stage I (T1) disease. It is inadequate for Stage II (muscle-invasive) disease. * **Option C:** Smoking is the **most significant risk factor** for bladder cancer, increasing the risk by 3-4 times due to alpha and beta-naphthylamines excreted in urine. * **Option D:** Neoadjuvant chemotherapy (usually cisplatin-based regimens like MVAC or Gem-Cis) is now a standard recommendation for Stage II disease before radical cystectomy, as it improves overall survival. **High-Yield Clinical Pearls for NEET-PG:** * **Staging:** T2 = Invades muscularis propria (Stage II); T3 = Invades perivesical tissue; T4 = Invades adjacent organs (prostate, uterus, pelvic wall). * **Investigation of Choice:** Contrast-Enhanced CT (CECT) of the Abdomen and Pelvis for staging; Cystoscopy with biopsy for diagnosis. * **Schistosomiasis:** Associated specifically with **Squamous Cell Carcinoma** of the bladder, not TCC. * **Most common site:** Lateral walls of the bladder.

Question 707: Urinary catheterization is indicated in cases of acute retention of urine, except in which of the following conditions?

A. Stricture
B. Rupture (Correct Answer)
C. Postoperative
D. Carcinoma of the prostate

Explanation: In urological emergencies, the primary goal of managing acute urinary retention (AUR) is to decompress the bladder. However, the method of decompression depends on the integrity of the urinary tract. **Why "Rupture" is the correct answer:** In cases of suspected **urethral rupture** (often associated with pelvic fractures or straddle injuries), blind urethral catheterization is **strictly contraindicated**. Attempting to pass a catheter can convert a partial urethral tear into a complete transection, introduce infection into a perivesical hematoma, or create a false passage. Clinical signs such as **blood at the meatus**, a **high-riding prostate** on digital rectal examination, or **perineal ecchymosis** (butterfly bruising) mandate a **Retrograde Urethrogram (RUG)** before any instrumentation. In these cases, a Suprapubic Cystostomy (SPC) is the preferred method of bladder drainage. **Analysis of incorrect options:** * **Stricture:** While a urethral stricture makes catheterization difficult, it is not an absolute contraindication. If a standard Foley fails, smaller caliber catheters or filiforms and followers are used. * **Postoperative:** AUR is a common complication after spinal anesthesia or pelvic surgery; urethral catheterization is the standard first-line management. * **Carcinoma of the Prostate:** Prostatic enlargement (benign or malignant) is a leading cause of AUR. Catheterization is indicated, though a Coudé tip catheter may be required to bypass the prostatic obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation** for suspected urethral injury: Retrograde Urethrogram (RUG). * **Triad of Urethral Injury:** Blood at meatus, inability to void, and palpable distended bladder. * **Membranous Urethra:** The most common site of rupture in pelvic fractures. * **Bulbar Urethra:** The most common site of rupture in "straddle" (fall-a-stride) injuries.

Question 708: Magnesium-ammonium phosphate stones are usually secondary to urinary tract infection with which of the following organisms?

A. Escherichia coli
B. Proteus species (Correct Answer)
C. Klebsiella
D. Enterococcus

Explanation: **Explanation:** **Magnesium-ammonium phosphate (Struvite) stones**, also known as triple phosphate or infection stones, are formed due to the presence of **urease-producing bacteria**. The underlying mechanism involves the enzyme **urease**, which hydrolyzes urea into ammonia and carbon dioxide. This process increases urinary ammonia levels and raises the urinary pH (alkaline urine, typically >7.2). In this alkaline environment, the solubility of phosphate decreases, leading to the precipitation of magnesium, ammonium, and phosphate ions. * **Proteus species (Correct Answer):** This is the most common urease-producing organism associated with these stones. Proteus is highly potent in splitting urea, leading to the rapid formation of large, branched **Staghorn calculi** that fill the renal pelvis and calyces. * **Escherichia coli (Incorrect):** While E. coli is the most common cause of UTIs overall, it is generally **not** a urease-producer. Therefore, it is rarely associated with struvite stone formation. * **Klebsiella (Incorrect):** Although some strains of Klebsiella can produce urease, it is far less common and less potent than Proteus in the context of stone pathogenesis. * **Enterococcus (Incorrect):** These are gram-positive cocci that do not typically produce urease and are not primary drivers of struvite stone formation. **High-Yield Clinical Pearls for NEET-PG:** * **Composition:** Magnesium Ammonium Phosphate + Calcium Carbonate. * **Radiology:** These stones are **radiopaque** and typically present as a **Staghorn calculus**. * **Risk Factors:** More common in females due to a higher incidence of UTIs. * **Management:** Requires complete surgical removal (e.g., PCNL) because the stones harbor bacteria within their matrix, leading to recurrent infections if any fragments remain.

Question 709: All of the following can be seen in hypernephroma, except:

A. Polycythemia
B. Renal vein thrombosis
C. Hypertension
D. None of the above (Correct Answer)

Explanation: **Explanation:** Hypernephroma, now more commonly known as **Renal Cell Carcinoma (RCC)**, is famously referred to as the "Internist's Tumor" because of its diverse systemic manifestations and paraneoplastic syndromes. The correct answer is **None of the above** because all three listed conditions are well-recognized features of the disease. 1. **Polycythemia (Option A):** RCC can produce ectopic **Erythropoietin (EPO)**, which stimulates the bone marrow to increase red blood cell production. While anemia is more common in RCC, polycythemia occurs in about 1–5% of cases. 2. **Renal Vein Thrombosis (Option B):** RCC has a unique propensity for **angioinvasion**. The tumor often forms a "tumor thrombus" that extends into the renal vein and can propagate further into the Inferior Vena Cava (IVC), sometimes reaching the right atrium. 3. **Hypertension (Option C):** This occurs in up to 40% of patients. It can be caused by the secretion of **Renin** by the tumor, compression of the intrarenal vasculature (Goldblatt phenomenon), or hypercalcemia. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Hematuria, Flank pain, and Palpable mass (seen in only 10% of cases; signifies advanced disease). * **Stauffer’s Syndrome:** Reversible hepatic dysfunction (elevated LFTs) in the absence of liver metastases. * **Left-sided Varicocele:** Occurs if the tumor thrombus obstructs the left renal vein, preventing drainage of the left gonadal vein. * **Most common histological subtype:** Clear cell carcinoma (originates from the Proximal Convoluted Tubule).

Question 710: Which of the following is true about transitional cell carcinoma of the urinary bladder?

A. Smoking predisposes to transitional cell carcinoma of the urinary bladder.
B. Schistosoma infection predisposes to transitional cell carcinoma of the urinary bladder.
C. Exposure to aniline dyes predisposes to transitional cell carcinoma of the urinary bladder.
D. All of the above (Correct Answer)

Explanation: **Explanation:** Bladder cancer is the second most common urological malignancy, with **Transitional Cell Carcinoma (TCC)**, also known as Urothelial Carcinoma, accounting for over 90% of cases. The etiology is multifactorial, involving chronic irritation and exposure to environmental carcinogens. * **Smoking (Option A):** This is the **most significant risk factor** for TCC, responsible for approximately 50% of cases. Carcinogens like alpha and beta-naphthylamine are inhaled and excreted in the urine, leading to "field cancerization" of the urothelium. * **Aniline Dyes (Option C):** Occupational exposure in the rubber, leather, textile, and printing industries is a classic risk factor. Chemicals such as benzidine and 2-naphthylamine are potent urothelial carcinogens. * **Schistosoma haematobium (Option B):** While *Schistosoma* is most famously associated with **Squamous Cell Carcinoma (SCC)** due to chronic irritation, it is also a recognized risk factor for the development of **Transitional Cell Carcinoma**, particularly in endemic areas like the Nile Valley. Since all three factors contribute to the pathogenesis of bladder cancer, **Option D** is the correct answer. **High-Yield Clinical Pearls for NEET-PG:** * **Most common presentation:** Painless gross hematuria (seen in 85% of patients). * **Gold Standard Investigation:** Cystoscopy with biopsy. * **Schistosomiasis:** Classically causes SCC (Squamous), but can cause TCC. * **Drugs:** Long-term use of **Cyclophosphamide** (metabolite Acrolein) and **Phenacetin** abuse are high-yield risk factors for TCC. * **Chronic Irritation:** Long-term indwelling catheters or bladder stones predispose primarily to Squamous Cell Carcinoma.

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Renal Cell Carcinoma

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Testicular Tumors

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Urology — MCQs

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