Urology Practice Questions

Q: Which of the following is NOT a contraindication for extracorporeal shockwave lithotripsy for renal calculi?

Stone in a calyceal diverticulum. **Explanation:** Extracorporeal Shockwave Lithotripsy (ESWL) is a non-invasive treatment for renal calculi, but its success depends on the ability of the fragmented stones to pass through the urinary tract. **Why "Stone in a calyceal diverticulum" is the correct answer:** A stone in a calyceal diverticulum is considered a **relative contraindication** or a factor for poor clearance, but it is **not an absolute contraindication**. While ESWL can fragment the stone, the narrow neck of the diverticulum often prevents the passage of fragments. However, ESWL may still be attempted for symptomatic relief in specific cases, unlike the other options which pose significant safety risks. **Analysis of Incorrect Options:** * **Pregnancy (Option A):** This is an **absolute contraindication**. Shockwaves can cause fetal injury, placental abruption, or miscarriage. * **Bleeding Disorder (Option B):** Uncorrected coagulopathy is an **absolute contraindication** due to the high risk of life-threatening perinephric hematoma. * **Stone >2 cm (Option C):** Large stones (>2 cm) are a **relative contraindication**. They have a low clearance rate and carry a high risk of *Steinstrasse* (stone street), where fragments obstruct the ureter. Percutaneous Nephrolithotomy (PCNL) is the preferred treatment for stones >2 cm. **High-Yield Clinical Pearls for NEET-PG:** * **Best candidate for ESWL:** Small (<1.5 cm), radiopaque, friable stones (e.g., Calcium oxalate dihydrate) located in the upper or middle calyx. * **Hardest stones to fragment:** Calcium oxalate monohydrate, Cystine, and Brushite stones. * **Anatomical Contraindications:** Distal obstruction (fragments won't pass), uncontrolled UTI, and abdominal aortic aneurysm (risk of rupture). * **Ideal Location:** Lower pole stones have the poorest clearance rates due to gravity.

Q: What is the cell of origin of primary lymphoma of the gastrointestinal tract associated with celiac disease?

T-cell. **Explanation:** The correct answer is **T-cell**. Primary gastrointestinal lymphoma associated with celiac disease is specifically known as **Enteropathy-Associated T-cell Lymphoma (EATL)**. **Why T-cell is correct:** Celiac disease is characterized by a chronic inflammatory response to gluten, leading to the proliferation of intraepithelial lymphocytes (IELs). In a small subset of patients, these IELs undergo malignant transformation. Since these IELs are primarily of T-cell lineage (specifically CD3+ and CD8+), the resulting malignancy is a T-cell lymphoma. It typically involves the proximal small intestine (jejunum) and carries a poor prognosis. **Why other options are incorrect:** * **B-cell:** While B-cell lymphomas (like MALToma) are the most common type of primary GI lymphoma overall, they are not specifically associated with celiac disease. MALToma is more commonly linked to *H. pylori* infection in the stomach. * **Histiocyte:** Histiocytic malignancies are extremely rare in the GI tract and do not have a known pathophysiological link to gluten-sensitive enteropathy. * **Dendritic cell:** These are antigen-presenting cells. While they play a role in the immune response to gluten, they do not undergo malignant transformation in the context of celiac disease. **High-Yield Clinical Pearls for NEET-PG:** * **EATL Type 1:** Strongly associated with Celiac disease and HLA-DQ2/DQ8. * **Presentation:** Often presents with intestinal perforation, obstruction, or refractory malabsorption despite a gluten-free diet. * **Most common site of GI Lymphoma:** Stomach (usually B-cell/MALToma). * **Most common site of EATL:** Jejunum. * **Refractory Celiac Disease (Type II):** Often considered a "pre-lymphoma" state due to the presence of clonal T-cell populations.

Q: A 50-year-old male presents with a hard scrotal swelling. Which of the following investigations is NOT indicated?

Testicular biopsy. In a 50-year-old male presenting with a hard scrotal swelling, the primary clinical suspicion is **Testicular Cancer** until proven otherwise. ### **Why Testicular Biopsy is Contraindicated (Correct Answer)** A trans-scrotal testicular biopsy is strictly **contraindicated** in suspected testicular tumors. This is due to the risk of **"Scrotal Seeding"** or **"Tumor Spillage."** The lymphatic drainage of the testis is to the para-aortic lymph nodes, whereas the scrotum drains to the inguinal lymph nodes. Violating the scrotal wall alters the natural lymphatic drainage, potentially spreading the malignancy to the inguinal region and upstaging the disease. ### **Analysis of Other Options** * **Chest X-ray:** Indicated to screen for pulmonary metastases (the most common site of distant spread in germ cell tumors). * **Inguinal Exploration:** This is the standard surgical approach. If a tumor is suspected, a **Radical Inguinal Orchidectomy** is performed. The spermatic cord is clamped at the internal inguinal ring before mobilizing the testis to prevent intraoperative hematogenous spread. * **CT Abdomen:** Essential for staging, specifically to evaluate the **para-aortic lymph nodes**, which are the primary site of nodal metastasis. ### **High-Yield Clinical Pearls for NEET-PG** * **Gold Standard Diagnosis:** Radical Inguinal Orchidectomy (both diagnostic and therapeutic). * **Lymphatic Drainage:** Testis → Para-aortic nodes; Scrotum → Superficial Inguinal nodes. * **Tumor Markers:** Always check AFP, beta-hCG, and LDH before surgery. Note: AFP is *never* elevated in pure seminomas. * **Most Common Type:** Seminoma is the most common testicular tumor in this age group.

Q: What is the most common presentation of renal tuberculosis?

Sterile pyuria. **Explanation:** Renal tuberculosis (Genitourinary TB) is the most common site of extrapulmonary tuberculosis. It occurs due to the hematogenous spread of *Mycobacterium tuberculosis* to the renal cortex, forming microscopic granulomas. **1. Why "Sterile Pyuria" is correct:** Sterile pyuria is defined as the presence of white blood cells (pus cells) in the urine in the absence of growth on routine bacterial culture media. In renal TB, the mycobacteria cause chronic inflammation and ulceration of the pelvicalyceal system, leading to the discharge of pus into the urine. Since *M. tuberculosis* does not grow on standard agar, the culture remains "sterile," making this the **most common and characteristic laboratory presentation.** **2. Analysis of Incorrect Options:** * **Renal Colic:** While possible if a blood clot or a piece of sloughed papilla obstructs the ureter ("clot colic"), it is an infrequent presentation compared to pyuria. * **Intractable Urgency:** This is a classic symptom of a "Thimble Bladder" (fibrosed, low-capacity bladder) in late-stage TB. While highly suggestive, it is a late manifestation rather than the most common initial presentation. * **Painful Micturition:** Dysuria is common in urinary tract infections, but in TB, the presentation is often more insidious and chronic rather than acute painful micturition. **Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Urine culture on **Lowenstein-Jensen (LJ) medium** (requires 6–8 weeks). * **Earliest Radiological Sign:** "Moth-eaten" appearance of the calyces due to erosions. * **Putty Kidney:** A late-stage finding where the kidney is non-functioning and autonephrectomized due to caseous necrosis and calcification. * **Investigation of Choice:** Contrast-enhanced CT (CECT) to assess the extent of the disease.

Q: Which of the following statements about pyonephrosis is FALSE?

Always unilateral. **Explanation:** **Pyonephrosis** is a surgical emergency characterized by the accumulation of purulent debris (pus) within an obstructed collecting system. **Why Option B is the Correct (False) Statement:** Pyonephrosis is **not always unilateral**. While it is most commonly seen on one side due to a localized obstruction (like a stone), it can be **bilateral** in cases of bladder outlet obstruction (e.g., Benign Prostatic Hyperplasia or Posterior Urethral Valves) or bilateral ureteric involvement (e.g., advanced pelvic malignancy). In medical exams, absolute terms like "always" are frequently markers of false statements. **Analysis of Other Options:** * **Option A (Commonly associated with renal calculi):** This is **True**. Nephrolithiasis is the most common cause of the obstruction that leads to pyonephrosis. * **Option C (Complication of hydronephrosis):** This is **True**. When a pre-existing hydronephrotic kidney (dilated due to obstruction) becomes infected, it transforms into pyonephrosis. * **Option D (Follows acute pyelonephritis):** This is **True**. Severe acute pyelonephritis in the presence of an obstruction can lead to the formation of pus within the renal pelvis. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Fever/chills, flank pain, and a palpable tender mass. * **Diagnosis:** **Ultrasound** is the initial investigation of choice (shows persistent echoes/debris in a dilated system). **CT scan** is the most accurate for identifying the cause of obstruction. * **Management:** It is a **urological emergency**. The priority is urgent decompression via **Percutaneous Nephrostomy (PCN)** or retrograde stenting (DJ stent). Antibiotics alone are insufficient because they cannot penetrate the obstructed, pus-filled system.

Q: A 42-year-old paraplegic woman with a neurogenic bladder requires an indwelling urinary catheter. She develops a urinary tract infection and is seen by a urologist. Radiographic studies demonstrate a large stone that fills and follows the contours of the renal pelvis. The stone is most likely composed of which of the following?

Magnesium ammonium phosphate. **Explanation:** The clinical presentation describes a **Staghorn Calculus** (a stone filling the renal pelvis and calyces) in a patient with a neurogenic bladder and a history of recurrent urinary tract infections (UTIs). **1. Why Magnesium Ammonium Phosphate is correct:** These stones, also known as **Struvite** or **Triple Phosphate** stones, are strongly associated with UTIs caused by **urease-producing bacteria** (e.g., *Proteus mirabilis*, *Klebsiella*, *Pseudomonas*). Urease hydrolyzes urea into ammonia and carbon dioxide, increasing urinary pH (alkaline urine). In this alkaline environment, magnesium ammonium phosphate and carbonate apatite precipitate to form large, branched stones that take the shape of the renal collecting system (Staghorn appearance). Paraplegic patients with indwelling catheters are at high risk due to urinary stasis and frequent colonization by these organisms. **2. Why the other options are incorrect:** * **Calcium salts:** Calcium oxalate is the most common type of renal stone overall, but it typically presents as small, radiopaque stones rather than massive staghorn calculi. * **Cholesterol:** These are found in the gallbladder (gallstones), not the urinary tract. * **Cystine:** These result from an autosomal recessive defect in amino acid transport. While they can occasionally form staghorn shapes, they are much rarer and typically occur in younger patients without the specific context of urease-producing infections. **Clinical Pearls for NEET-PG:** * **Radiopacity:** Struvite stones are **radio-opaque** (though less dense than calcium). * **Microscopy:** Look for **"Coffin-lid"** shaped crystals in the urine sediment. * **Treatment:** Requires complete surgical removal (usually PCNL) because the stone acts as a reservoir for bacteria, leading to recurrent sepsis. * **Chemical composition:** Magnesium Ammonium Phosphate + Carbonate Apatite.

Question 1

Which of the following is NOT a contraindication for extracorporeal shockwave lithotripsy for renal calculi?

Accepted Answer

Stone in a calyceal diverticulum

Answer

Pregnancy

Answer

Bleeding disorder

Answer

Stone >2 cm

Question 2

What is the cell of origin of primary lymphoma of the gastrointestinal tract associated with celiac disease?

Accepted Answer

T-cell

Answer

B-cell

Answer

Histiocyte

Answer

Dendritic cell

Question 3

All of the following clinicopathologic features are seen more often in seminomas as compared to nonseminomatous germ cell tumors of the testis except?

Accepted Answer

They are often associated with raised levels of serum AFP and HCG.

Answer

Tumors remain localized to the testis for a long time.

Answer

They are radiosensitive.

Answer

They metastasize predominantly by lymphatics.

Question 4

All the following statements are true regarding torsion of testis EXCEPT?

Accepted Answer

Anatomical abnormality is unilateral and contralateral testis should not be fixed

Answer

Prompt exploration and twisting & fixation is the only way to save the torted testis

Answer

Most common between 10 and 25 years of age

Answer

Inversion of testis is the most common predisposing cause

Question 5

Which of the following statements regarding finasteride is FALSE?

Accepted Answer

It blocks the conversion of dihydrotestosterone to testosterone.

Answer

It is used in the medical treatment of benign prostatic hypertrophy (BPH).

Answer

Impotence is well documented after its use.

Answer

It is a 5-alpha reductase inhibitor.

Question 6

A 50-year-old male presents with a hard scrotal swelling. Which of the following investigations is NOT indicated?

Accepted Answer

Testicular biopsy

Answer

Chest X-ray

Answer

Inguinal exploration

Answer

CT abdomen

Question 7

What is the most common presentation of renal tuberculosis?

Accepted Answer

Sterile pyuria

Answer

Renal colic

Answer

Intractable urgency

Answer

Painful micturition

Question 8

Which of the following statements about pyonephrosis is FALSE?

Accepted Answer

Always unilateral

Answer

Commonly associated with renal calculi

Answer

Is a complication of hydronephrosis

Answer

Follows acute pyelonephritis

Question 9

A 42-year-old paraplegic woman with a neurogenic bladder requires an indwelling urinary catheter. She develops a urinary tract infection and is seen by a urologist. Radiographic studies demonstrate a large stone that fills and follows the contours of the renal pelvis. The stone is most likely composed of which of the following?

Accepted Answer

Magnesium ammonium phosphate

Answer

Calcium salts

Answer

Cholesterol

Answer

Cystine

Question 10

Which of the following is a communicating hydrocele?

Accepted Answer

Funicular hydrocele

Answer

Vaginal hydrocele

Answer

Hydrocele of the cord

Answer

Infantile hydrocele

Urology — MCQs

Urology — MCQs

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