Urology Practice Questions

Q: A 35-year-old male patient presents with colicky abdominal pain and a 3 cm stone in the renal pelvis. There is no hydronephrosis, no distal obstruction, and his renal parameters are normal. What is the management of choice for this patient?

Percutaneous Nephrolithotomy (PCNL). **Explanation:** The management of renal stones is primarily determined by the **size, location, and composition** of the stone. According to current urological guidelines (EAU/AUA), **Percutaneous Nephrolithotomy (PCNL)** is the gold standard and treatment of choice for renal pelvic stones **>2 cm** in diameter. 1. **Why PCNL is correct:** For a 3 cm stone, PCNL offers the highest stone-free rate (SFR) in a single session. Large stones have a high stone burden that exceeds the effective clearance capacity of less invasive methods. 2. **Why other options are incorrect:** * **ESWL:** Generally reserved for stones **<2 cm**. For a 3 cm stone, ESWL has a high failure rate, often requires multiple sessions, and carries a significant risk of *Steinstrasse* (stone street), where fragmented debris obstructs the ureter. * **Open Pyelolithotomy:** This is a highly invasive surgical procedure. It is now reserved only for complex cases where minimally invasive techniques (PCNL/RIRS) have failed or are anatomically impossible. * **Dissolution therapy:** This is only effective for **Uric Acid stones**. Most renal stones are Calcium Oxalate (radio-opaque), and a 3 cm stone requires active surgical intervention rather than medical management alone. **High-Yield Clinical Pearls for NEET-PG:** * **Stone 1 cm favor PCNL/RIRS). * **Stone >2 cm:** PCNL is the treatment of choice. * **Staghorn Calculi:** PCNL is the primary management strategy.

Q: What is an indication for surgery in benign prostatic hyperplasia?

Post-void residual urine volume of 200 ml. In Benign Prostatic Hyperplasia (BPH), the decision for surgical intervention (typically TURP) is based on the presence of **absolute** or **relative indications** that signify bladder decompensation or complications. ### **Explanation of the Correct Option** **A. Post-void residual (PVR) urine volume of 200 ml:** A high PVR volume is a sign of chronic urinary retention and bladder outlet obstruction. While there is no universal cutoff, a PVR **>100–200 ml** is generally considered a relative indication for surgery. It suggests that the bladder musculature (detrusor) is failing to overcome the urethral resistance, increasing the risk of urinary tract infections (UTIs) and bladder stones. ### **Explanation of Incorrect Options** * **B & C (Weakened stream and Dysuria):** These are **Lower Urinary Tract Symptoms (LUTS)**. While bothersome, they are subjective and initially managed with medical therapy (Alpha-blockers or 5-Alpha-reductase inhibitors). Surgery is only considered if these symptoms are refractory to medical treatment. * **D (Residual urine <100 ml):** This is often considered within an acceptable range for elderly patients or those with mild BPH and does not warrant surgical intervention. ### **High-Yield Clinical Pearls for NEET-PG** * **Absolute Indications for Surgery (VOIDC):** 1. **V**esical Calculi (Bladder stones) 2. **O**utflow obstruction causing Renal Failure (Hydronephrosis/Azotemia) 3. **I**ntractable Gross Hematuria 4. **D**ecompensated Bladder (Recurrent UTIs) 5. **C**omplete Urinary Retention (Failure of at least one catheter trial) * **Gold Standard Investigation:** Uroflowmetry (Qmax 80–100g, Open Prostatectomy or HoLEP is preferred.

Q: Which of the following is NOT true about struvite stones?

Usually seen in acidic urine. **Explanation:** Struvite stones are primarily associated with **alkaline urine**, not acidic urine. This is the fundamental pathophysiological concept tested here. **1. Why Option D is the Correct Answer (The False Statement):** Struvite stones form only when the urinary pH is high (**pH > 7.2**). They are caused by urea-splitting organisms (e.g., *Proteus mirabilis*, *Klebsiella*) that produce the enzyme **urease**. Urease hydrolyzes urea into ammonia and carbon dioxide. The ammonia then increases the hydroxyl ion concentration, making the urine alkaline. This alkalinity reduces the solubility of magnesium ammonium phosphate, leading to stone precipitation. **2. Analysis of Other Options:** * **Option A (Staghorn Calculus):** Because these stones form in the presence of infection and can grow rapidly, they often fill the entire renal pelvis and branched calyces, taking the shape of a deer's horn (Staghorn). * **Option B (Triple Phosphate):** Chemically, struvite is **Magnesium Ammonium Phosphate (MAP)**. It is called "triple phosphate" because it historically referred to the combination of magnesium, ammonium, and phosphate ions. * **Option C (Infected Urine):** These are classic "infection stones." Without the presence of urease-producing bacteria, the specific alkaline environment required for struvite formation does not occur. **High-Yield Clinical Pearls for NEET-PG:** * **Microscopy:** Characterized by **"Coffin-lid"** shaped crystals. * **Radiology:** They are **Radio-opaque** (though less dense than calcium oxalate). * **Gender Predilection:** More common in **females** due to the higher incidence of Urinary Tract Infections (UTIs). * **Treatment:** Complete surgical removal (often via PCNL) is necessary because the stone itself acts as a reservoir for bacteria, leading to recurrent infections.

Q: A 30-year-old male presents to the OPD with erectile dysfunction. Basic screening evaluation is unremarkable. What is the next step in the evaluation or management?

Oral sildenafil citrate trial. **Explanation:** The management of Erectile Dysfunction (ED) follows a stepwise approach. In a young patient with an unremarkable basic screening (history, physical exam, and basic labs like glucose and lipid profile), the **first-line management** is the administration of **Oral Phosphodiesterase-5 (PDE-5) inhibitors**, such as Sildenafil. **Why Option A is correct:** Current clinical guidelines (AUA/EAU) recommend a trial of PDE-5 inhibitors as both a therapeutic step and a diagnostic indicator. If the patient responds well, further invasive testing is unnecessary. Since the basic evaluation is unremarkable, the most likely etiology is either psychogenic or early vasculogenic, both of which typically respond to oral therapy. **Why other options are incorrect:** * **Options B & C (Cavernosonometry & Doppler):** These are specialized vascular studies. Duplex Doppler is used to assess arterial inflow, while Cavernosonometry/Cavernosography evaluates venous leak. These are **second-line investigations** reserved for patients who fail oral therapy or those being considered for vascular surgery. * **Option D (Neurological testing):** This is only indicated if the initial history or physical examination (e.g., bulbocavernosus reflex, sensory loss) suggests a neurological deficit (e.g., post-pelvic surgery or spinal cord injury). **High-Yield Clinical Pearls for NEET-PG:** 1. **First-line treatment for ED:** Lifestyle modifications + Oral PDE-5 inhibitors. 2. **Mechanism of Sildenafil:** Inhibits PDE-5, increasing **cGMP** levels, leading to smooth muscle relaxation and increased blood flow. 3. **Contraindication:** Never co-administer PDE-5 inhibitors with **Nitrates** (leads to severe hypotension). 4. **Most common cause of ED:** Historically thought to be psychogenic, but now recognized as **vasculogenic** (often an early marker of Coronary Artery Disease).

Q: What is the most important diagnostic investigation for renal cell carcinoma?

CT scan of abdomen and pelvis. **Explanation:** The gold standard and most important diagnostic investigation for Renal Cell Carcinoma (RCC) is a **Contrast-Enhanced CT (CECT) scan of the abdomen and pelvis**. **1. Why CT Scan is the Correct Answer:** A CECT is the primary modality for diagnosis, staging, and surgical planning. It provides critical information regarding: * **Tumor Characteristics:** RCC typically shows significant enhancement (wash-in) during the arterial phase followed by washout. * **Staging:** It accurately assesses local extension, lymph node involvement, and the presence of venous thrombus in the renal vein or Inferior Vena Cava (IVC). * **Anatomy:** It helps in planning a partial vs. radical nephrectomy by mapping the vascular anatomy. **2. Why Other Options are Incorrect:** * **USG (Ultrasound):** Usually the **initial** investigation or screening tool for incidental findings, but it lacks the sensitivity and detail required for definitive staging and surgical planning. * **MRI:** Reserved for specific cases, such as patients with contrast allergies, renal failure, or when there is a need to better define the extent of a thrombus in the IVC. It is not the first-line "most important" test. * **PET CT:** Not routinely used for the primary diagnosis of RCC as many renal tumors are not FDG-avid. Its role is limited to detecting distant metastases or monitoring recurrence. **Clinical Pearls for NEET-PG:** * **Triad of RCC:** Hematuria, flank pain, and palpable mass (seen in <10% of cases; signifies advanced disease). * **Most common histological type:** Clear cell carcinoma (originates from Proximal Convoluted Tubule). * **Staging:** Robson’s classification (historical) and TNM staging (current). * **Paraneoplastic syndromes:** RCC is known as the "Internist's tumor" due to associations with polycythemia (EPO), hypercalcemia (PTHrP), and Stauffer’s syndrome (non-metastatic hepatic dysfunction).

Q: A 50-year-old female presents with abdominal pain and anuria. Radiological studies reveal bilateral impacted ureteric stones with hydronephrosis. Urine analysis shows RBCs and pus cells. Serum creatinine is 16 mg/dL and blood urea is 200 mmol/L. What should be the immediate treatment?

J stent drainage. **Explanation:** The patient presents with **obstructive uropathy** leading to acute renal failure (Creatinine 16 mg/dL, Urea 200 mmol/L) and potential sepsis (pus cells in urine). In cases of bilateral ureteric obstruction with azotemia, the immediate priority is **decompression of the collecting system** to restore renal function and prevent permanent nephron damage. **1. Why C is correct:** **Double J (DJ) stenting** or Percutaneous Nephrostomy (PCN) are the gold-standard emergency treatments for obstructive uropathy. Stenting bypasses the obstruction, allows infected urine to drain, and stabilizes the patient’s renal parameters. Once the creatinine levels normalize and the infection is controlled, definitive stone management can be planned. **2. Why other options are incorrect:** * **A & B (Lithotripsy/URS):** These are definitive treatments for stones. However, they are **contraindicated** in the acute phase of obstruction with renal failure and infection. Performing these procedures on an unstable, uremic patient significantly increases the risk of urosepsis and surgical complications. * **D (Hemodialysis):** While the creatinine is very high, the underlying cause is **post-renal (obstructive)**. Dialysis may temporarily lower toxins but does not address the mechanical obstruction. Decompression (DJ stent) often leads to a rapid decline in creatinine, potentially making dialysis unnecessary. **Clinical Pearls for NEET-PG:** * **Emergency Urology Triad:** Fever + Flank Pain + High Creatinine = Surgical Emergency (Needs immediate drainage). * **Choice of Drainage:** DJ stent is preferred if the patient is stable; PCN is preferred if the patient is in septic shock or if stenting fails. * **Post-obstructive Diuresis:** After relief of bilateral obstruction, monitor the patient for massive diuresis and electrolyte imbalances.

Q: What is the most common type of renal stone?

Calcium oxalate. **Explanation:** **Calcium oxalate** is the most common type of renal stone worldwide, accounting for approximately **75–80%** of all urinary calculi. These stones typically form in acidic or neutral urine. They are radiopaque (visible on X-ray) and are further classified into two types: Calcium oxalate monohydrate (Whewellite), which are hard and dumbbell-shaped, and Calcium oxalate dihydrate (Weddellite), which are envelope-shaped. **Analysis of Incorrect Options:** * **Triple phosphate & Struvite stones (Options B & C):** These terms are often used interchangeably. Struvite stones (Magnesium Ammonium Phosphate) account for about 10–15% of cases. They are "infection stones" associated with urea-splitting organisms like *Proteus* and *Klebsiella* and often form large **Staghorn calculi** in alkaline urine. * **Urate stones (Option D):** Uric acid stones account for about 5–10% of stones. They are unique because they are **radiolucent** (not seen on X-ray) but visible on CT scans. They form in persistently acidic urine and are associated with gout or high cell turnover. **High-Yield Clinical Pearls for NEET-PG:** * **Most common constituent:** Calcium oxalate (specifically Monohydrate is more common than Dihydrate). * **Most common cause of Calcium stones:** Idiopathic hypercalciuria (not hyperparathyroidism). * **Appearance on Microscopy:** * Calcium oxalate dihydrate: **Envelope/Pyramid** shape. * Calcium oxalate monohydrate: **Dumbbell/Oval** shape. * Struvite: **Coffin-lid** appearance. * Cystine: **Hexagonal** (associated with "benzene ring" shape). * **Investigation of Choice:** Non-Contrast Enhanced CT (NCCT) KUB is the gold standard for all renal stones.

Q: What is the treatment of 'thimble bladder'?

Ileocystoplasty. **Explanation:** **Thimble bladder** (also known as a systolic bladder) is the end-stage manifestation of **Genitourinary Tuberculosis (GUTB)**. Chronic tuberculous infection leads to extensive transmural fibrosis and scarring of the bladder wall, resulting in a severely reduced capacity (often <50 ml) and high intravesical pressures. 1. **Why Ileocystoplasty is correct:** Once a thimble bladder has formed, the changes are irreversible and anatomical. Medical therapy cannot restore bladder volume. **Augmentation cystoplasty** (specifically **Ileocystoplasty**) is the treatment of choice. It involves using a detubularized segment of the ileum to increase bladder capacity and lower pressure, thereby protecting the upper urinary tract from reflux and renal failure. 2. **Why other options are incorrect:** * **Anti-tubercular treatment (ATT):** While ATT is mandatory to treat active TB, it cannot reverse established fibrosis. In fact, ATT can sometimes worsen the contracture during the healing phase due to further scarring. * **Corticosteroids:** These are used in early-stage GUTB to reduce edema and prevent ureteric strictures, but they have no role in treating a fibrotic, contracted thimble bladder. * **ATT + Steroids:** This combination is used for active inflammation but is ineffective for the end-stage mechanical failure of the bladder. **Clinical Pearls for NEET-PG:** * **Imaging:** On Intravenous Urogram (IVU), a thimble bladder appears as a small, smooth, rounded bladder shadow. * **Prerequisite for Surgery:** Surgery (Ileocystoplasty) should only be performed after the patient has completed at least **4–6 weeks of ATT** to ensure the urine is sterile and to prevent "miliary spread" during surgery. * **Contraindication:** If the bladder capacity is extremely small (<15 ml) or the urethra is involved, a **urinary diversion** (Ileal conduit) may be preferred over augmentation.

Q: A young male presents with abdominal pain. CT scan shows a heterogenous necrotizing mass at the left renal hilum. His AFP or hCG levels are elevated. What is the most likely diagnosis?

Metastatic germ cell tumor. **Explanation:** The presence of a **heterogenous necrotizing mass at the renal hilum (retroperitoneum)** in a young male, associated with elevated serum tumor markers (**AFP or β-hCG**), is a classic presentation of a **Metastatic Germ Cell Tumor (GCT)**. 1. **Why D is correct:** The retroperitoneum is the primary site for lymphatic spread from testicular germ cell tumors. In young men, any retroperitoneal mass should be considered a metastatic GCT until proven otherwise. Elevated **AFP** (Alpha-fetoprotein) is characteristic of Yolk Sac components, while elevated **β-hCG** is seen in Choriocarcinoma or Seminoma (mildly). A "necrotizing" appearance on CT often reflects the rapid growth and central ischemia typical of these aggressive tumors. 2. **Why other options are incorrect:** * **A. Lymphoma:** While common in the retroperitoneum, lymphoma typically presents as "bulky" homogenous lymphadenopathy that encases vessels without causing necrosis. It does **not** elevate AFP or hCG. * **B. Transitional Cell Carcinoma (TCC):** TCC arises from the urothelium (renal pelvis). While it can involve the hilum, it usually presents with hematuria in older patients and does not produce germ cell markers. * **C. Metastatic Melanoma:** Melanoma can metastasize anywhere, but it is not associated with elevated AFP/hCG and is less common than GCT in this demographic and location. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of Thumb:** In a young male with a retroperitoneal mass, always perform a **scrotal examination** and ultrasound to rule out a primary testicular tumor. * **Primary Extragonadal GCT:** Occasionally, GCTs can arise primarily in the retroperitoneum without a testicular primary. * **Markers:** * ↑ AFP: Yolk sac tumor (never in pure seminoma). * ↑ β-hCG: Choriocarcinoma, Seminoma (10-15% of cases). * ↑ LDH: Correlates with tumor burden/bulk.

Question 1

A 35-year-old male patient presents with colicky abdominal pain and a 3 cm stone in the renal pelvis. There is no hydronephrosis, no distal obstruction, and his renal parameters are normal. What is the management of choice for this patient?

Accepted Answer

Percutaneous Nephrolithotomy (PCNL)

Answer

Extracorporeal Shock Wave Lithotripsy (ESWL)

Answer

Open pyelolithotomy

Answer

Dissolution with oral potassium solution

Question 2

What is an indication for surgery in benign prostatic hyperplasia?

Accepted Answer

Post-void residual urine volume of 200 ml

Answer

Weakened urinary stream

Answer

Dysuria

Answer

Residual urine volume less than 100 ml

Question 3

Which of the following is NOT true about struvite stones?

Accepted Answer

Usually seen in acidic urine

Answer

Also known as staghorn calculus

Answer

These are triple phosphate stones

Answer

Common in infected urine

Question 4

A 30-year-old male presents to the OPD with erectile dysfunction. Basic screening evaluation is unremarkable. What is the next step in the evaluation or management?

Accepted Answer

Oral sildenafil citrate trial

Answer

Cavernosonometry

Answer

Doppler study

Answer

Neurological testing

Question 5

What is the most important diagnostic investigation for renal cell carcinoma?

Accepted Answer

CT scan of abdomen and pelvis

Answer

MRI

Answer

USG

Answer

PET CT

Question 6

A 50-year-old female presents with abdominal pain and anuria. Radiological studies reveal bilateral impacted ureteric stones with hydronephrosis. Urine analysis shows RBCs and pus cells. Serum creatinine is 16 mg/dL and blood urea is 200 mmol/L. What should be the immediate treatment?

Accepted Answer

J stent drainage

Answer

Lithotripsy

Answer

Ureteroscopic removal of stones

Answer

Hemodialysis

Question 7

What is the most common type of renal stone?

Accepted Answer

Calcium oxalate

Answer

Triple phosphate

Answer

Struvite stone

Answer

Urate stone

Question 8

A 60-year-old male presents with cancer of the prostate. The tumor is limited to the capsule and is palpable on per rectal examination. The patient is diagnosed as stage T1b. What is the best treatment?

Accepted Answer

Radical prostatectomy

Answer

Chemotherapy

Answer

Palliative radiotherapy

Answer

Orchidectomy

Question 9

What is the treatment of 'thimble bladder'?

Accepted Answer

Ileocystoplasty

Answer

Anti-tubercular treatment

Answer

Corticosteroids

Answer

Anti-tubercular drugs + steroids

Question 10

A young male presents with abdominal pain. CT scan shows a heterogenous necrotizing mass at the left renal hilum. His AFP or hCG levels are elevated. What is the most likely diagnosis?

Accepted Answer

Metastatic germ cell tumor

Answer

Lymphoma

Answer

Transitional cell carcinoma

Answer

Metastatic melanoma

Urology — MCQs

Urology — MCQs

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