Urology Practice Questions

Q: What is the composition of this stone?

Calcium oxalate dihydrate. ***Calcium oxalate dihydrate*** - **Weddellite** stones have a characteristic **smooth, polished surface** with a **pyramidal or bipyramidal shape**. - Under microscopy, they appear as **octahedral or envelope-shaped crystals** that are typically **colorless and translucent**. *Calcium oxalate monohydrate* - **Whewellite** stones have a **rough, jagged surface** with **sharp projections** that can cause more tissue trauma. - Microscopically appears as **dumbbell or oval-shaped crystals** that are typically **yellow-brown in color**. *Ammonium urate* - These stones have a **yellow-brown color** and **smooth surface** but are **radiolucent** on plain X-rays. - Form in **alkaline urine** and are associated with **chronic diarrhea** or **ileostomy patients**. *Calcium oxalate* - This is a **generic term** that encompasses both monohydrate and dihydrate forms. - **Non-specific option** as it doesn't distinguish between the two distinct crystalline forms with different appearances.

Q: A 60-year-old male presents with a poor stream of urine, a post-void residual urine volume of 400 mL, bilateral hydronephrosis, and a prostate weighing 70 g. His urea is 120 mg/dL and creatinine is 3.5 mg/dL. What is the ideal next immediate step?

Catheterize with Foley catheter. ### **Explanation** The patient presents with **Benign Prostatic Hyperplasia (BPH)** complicated by **chronic urinary retention**, leading to obstructive uropathy (bilateral hydronephrosis) and **post-renal azotemia** (elevated urea and creatinine). **1. Why Option A is Correct:** The immediate priority in any patient with renal failure due to bladder outlet obstruction is to **relieve the obstruction**. Catheterization with a Foley catheter is the simplest, fastest, and most effective way to drain the bladder, reduce intravesical pressure, and allow the kidneys to recover. This is the first step in managing "obstructive uropathy" before any definitive surgical intervention (like TURP) can be considered. **2. Why Other Options are Incorrect:** * **Option B (Bilateral PCN):** Percutaneous nephrostomy is indicated for supra-vesical (ureteric) obstruction. In this case, the obstruction is at the level of the prostate (infra-vesical), so draining the bladder is sufficient. * **Option C & D (CT/MRI):** While imaging is useful for staging malignancy, they have no role in the **immediate** management of acute-on-chronic renal failure. Stabilizing renal function takes precedence over definitive diagnostic imaging. **3. Clinical Pearls for NEET-PG:** * **Post-obstructive Diuresis:** After catheterization, monitor the patient for massive diuresis. If output >200 mL/hr, replace fluids with ½ Normal Saline to prevent electrolyte imbalance. * **Azotemia in BPH:** Surgery (TURP) is contraindicated while the patient is in renal failure. Always stabilize creatinine levels via catheterization first. * **Indications for Surgery in BPH:** Refractory urinary retention, recurrent UTIs, hematuria, bladder stones, and **renal insufficiency** (post-renal failure).

Q: What is the treatment of choice for ureteric colic?

None of the above. **Explanation:** The treatment of choice for ureteric colic has evolved significantly in modern clinical practice. Currently, **Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)**, specifically **Diclofenac** (75mg IM or 50mg oral/rectal), are considered the first-line treatment of choice. They work by inhibiting prostaglandin synthesis, which reduces ureteric smooth muscle spasm, decreases renal pelvic pressure, and reduces local edema. **Analysis of Options:** * **A. Nitrites:** These are vasodilators primarily used in angina or cyanide poisoning. They have no proven clinical efficacy in relieving the intense visceral pain of ureteric colic. * **B. Pethidine:** While opioids were historically used, they are no longer the "choice" because they can induce vomiting and may cause spasm of the sphincter of Oddi. If an opioid is required for refractory pain, **Morphine** is generally preferred over Pethidine. * **C. Adrenaline:** This is a sympathomimetic used in anaphylaxis or cardiac arrest. It has no role in managing renal colic and could potentially worsen the patient's physiological stress. Since the gold standard (NSAIDs) is not listed, **Option D (None of the above)** is correct. **High-Yield Clinical Pearls for NEET-PG:** 1. **First-line Analgesia:** NSAIDs (Diclofenac) are superior to opioids for ureteric colic. 2. **Medical Expulsive Therapy (MET):** For stones <10mm, **Alpha-blockers (Tamsulosin)** are used to relax the distal ureter and facilitate stone passage. 3. **Gold Standard Investigation:** Non-contrast Computed Tomography (**NCCT KUB**) is the investigation of choice for diagnosing ureteric calculi. 4. **Emergency Indication:** If a patient has ureteric colic with fever (infected hydronephrosis), it is a surgical emergency requiring immediate decompression via a **DJ stent** or **percutaneous nephrostomy (PCN)**.

Q: Which of the following substances is not used as an irrigant during transurethral resection of the prostate?

Normal Saline. **Explanation:** The primary goal of an irrigant during **Transurethral Resection of the Prostate (TURP)** is to provide a clear surgical field while remaining **non-conductive**. **Why Normal Saline is NOT used (Correct Answer):** Normal Saline is an isotonic, electrolyte-containing solution. Because it contains ions ($Na^+$ and $Cl^-$), it is **highly conductive**. During TURP, monopolar cautery is traditionally used to resect tissue. If a conductive fluid like Normal Saline is used, the electrical current would dissipate into the fluid rather than focusing on the tissue, leading to ineffective cutting and potential thermal injury to surrounding structures. (Note: Saline *can* be used in newer Bipolar TURP systems, but for standard NEET-PG questions, it remains the contraindicated irrigant). **Analysis of Other Options:** * **1.5% Glycine:** The most commonly used irrigant. It is non-conductive and transparent. However, its absorption can lead to "TURP Syndrome" (hyponatremia and ammonia toxicity). * **5% Dextrose:** Non-conductive and isotonic; however, it is rarely used because it can cause hyperglycemia and makes the surgical field "sticky." * **Distilled Water:** Non-conductive and provides excellent visibility. It is rarely used now because it is hypotonic, leading to hemolysis if absorbed into the circulation. **High-Yield Clinical Pearls for NEET-PG:** * **TURP Syndrome:** Occurs due to systemic absorption of glycine. Key features include **dilutional hyponatremia**, confusion, visual disturbances (due to glycine acting as an inhibitory neurotransmitter in the retina), and fluid overload. * **Ideal Irrigant Properties:** Isotonic, non-conductive, transparent, non-toxic, and inexpensive. * **Bipolar TURP:** This newer technology allows the use of **Normal Saline**, significantly reducing the risk of TURP syndrome.

Q: A 'bag of worms' appearance in the scrotum is typically associated with which condition?

Varicocele. **Explanation:** The "bag of worms" appearance is the classic clinical description for a **Varicocele**. This condition involves the abnormal dilation and tortuosity of the pampiniform plexus of veins within the spermatic cord. It occurs due to incompetent valves or venous obstruction, leading to blood pooling. It is most common on the **left side** (approx. 90%) because the left testicular vein enters the left renal vein at a perpendicular (90°) angle, leading to higher hydrostatic pressure compared to the right side, which drains obliquely into the IVC. **Why the other options are incorrect:** * **Spermatocele:** This is a retention cyst of the epididymis containing spermatozoa. It presents as a smooth, painless, transilluminating mass located superior to the testis. * **Inguinal Hernia:** This presents as a swelling in the groin or scrotum that typically has an expansile cough impulse and may be reducible. It does not have a "worm-like" texture. * **Hydrocele:** This is a collection of fluid within the tunica vaginalis. It presents as a smooth, tense, fluctuant swelling that is brilliantly transilluminating. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Varicoceles are best palpated while the patient is standing or performing the **Valsalva maneuver**. * **Infertility:** Varicocele is the most common surgically reversible cause of male infertility (due to increased scrotal temperature). * **Secondary Varicocele:** A sudden onset or right-sided varicocele should prompt an investigation for a **Renal Cell Carcinoma (RCC)** obstructing the renal vein. * **Grading:** Grade I (palpable only with Valsalva), Grade II (palpable standing), Grade III (visible through scrotal skin).

Q: Which of the following symptoms does not typically improve following a Transurethral Resection of the Prostate (TURP)?

Post-micturition dribble. **Explanation:** Transurethral Resection of the Prostate (TURP) is the gold standard surgical treatment for Lower Urinary Tract Symptoms (LUTS) secondary to Benign Prostatic Hyperplasia (BPH). LUTS are categorized into **Storage** and **Voiding** symptoms. **Why Post-micturition dribble is the correct answer:** Post-micturition dribble is the involuntary loss of urine immediately after finishing urination. It is often caused by urine being trapped in the bulbar urethra (due to the "sump effect") rather than by prostatic obstruction itself. Since TURP addresses the **bladder outlet obstruction (BOO)** at the level of the prostatic urethra but does not alter the anatomy or tone of the bulbar urethra or the pelvic floor muscles, this specific symptom typically persists post-operatively. **Analysis of Incorrect Options:** * **Incomplete emptying (Voiding symptom):** This is a direct result of mechanical obstruction. By resecting the adenoma, TURP widens the urethral channel, significantly improving flow and reducing post-void residual volume. * **Nocturia & Urge incontinence (Storage symptoms):** These occur due to detrusor overactivity caused by the bladder working against high pressure. Once the obstruction is removed, the bladder wall hypertrophy regresses, and irritability decreases, leading to improvement in these symptoms (though they may take longer to resolve than voiding symptoms). **High-Yield Clinical Pearls for NEET-PG:** * **Most improved symptom post-TURP:** Poor urinary stream (Flow rate). * **Least improved symptom post-TURP:** Nocturia (often multifactorial, involving age and renal physiology). * **Commonest complication of TURP:** Retrograde ejaculation (~75% of cases). * **TURP Syndrome:** Caused by systemic absorption of glycine (hypotonic, non-electrolytic irrigation fluid), leading to dilutional hyponatremia and neurological symptoms.

Q: What is the most common testicular tumor of childhood?

Embryonal carcinoma. **Explanation:** The correct answer is **Embryonal carcinoma** (specifically the **Yolk Sac Tumor** variant). In pediatric urology, Yolk Sac Tumor—historically referred to as infantile embryonal carcinoma or orchidoblastoma—is the most common primary testicular neoplasm in children, accounting for approximately 80% of cases in this age group. **Breakdown of Options:** * **Embryonal Carcinoma (Yolk Sac Tumor):** In children, these tumors typically present before age 3. They are characterized by the presence of **Schiller-Duval bodies** on histology and a significant elevation of serum **Alpha-fetoprotein (AFP)**. * **Teratoma:** While the second most common germ cell tumor in children, it is less frequent than Yolk Sac Tumors. Unlike adult teratomas, pediatric teratomas usually follow a benign clinical course. * **Seminoma:** This is the most common testicular tumor in **adults** (ages 30–40). It is extremely rare in prepubertal children. * **Choriocarcinoma:** This is a highly aggressive tumor characterized by high levels of **hCG**. It is rare in children and usually presents as part of a mixed germ cell tumor in post-pubertal males. **High-Yield Clinical Pearls for NEET-PG:** * **Most common overall testicular tumor in children:** Yolk Sac Tumor (Infantile Embryonal Carcinoma). * **Most common benign testicular tumor in children:** Teratoma (often treated with testis-sparing surgery). * **Tumor Marker:** AFP is the definitive marker for Yolk Sac Tumors; it is never elevated in pure seminomas. * **Age Distribution:** Testicular tumors in children show a bimodal distribution, with the first peak occurring before age 3 (mostly Yolk Sac Tumors).

Q: A 9-year-old boy presented with abdominal pain and recurrent UTI. IVP revealed duplication of the left ureter. What is the most likely site of ectopic opening?

Prostatic urethra. In cases of **ureteral duplication**, the **Weigert-Meyer Law** states that the ureter draining the upper pole moiety is the one that opens ectopically (inferior and medial to the normal orifice). ### Why Prostatic Urethra is Correct In males, ectopic ureters always drain **above the external sphincter**. The most common site for an ectopic ureteric opening in males is the **prostatic urethra** (approx. 50% of cases), followed by the seminal vesicles and vas deferens. Because the opening is proximal to the external sphincter, males with ectopic ureters typically present with **UTIs or flank pain** rather than urinary incontinence. ### Explanation of Incorrect Options * **B, C, and D (Ejaculatory duct, Seminal vesicle, Vas deferens):** While these are possible sites for ectopic drainage in males (as they all derive from the Wolffian/Mesonephric duct), they are statistically less common than the prostatic urethra. Drainage into these structures often leads to symptoms like epididymitis or perineal pain rather than simple recurrent UTI. ### High-Yield Clinical Pearls for NEET-PG * **Gender Difference in Incontinence:** In **females**, ectopic ureters can open below the sphincter (e.g., vestibule, vagina), leading to the classic presentation of **"constant dribbling despite normal voiding patterns."** In **males**, they always open above the sphincter, so they **never** present with incontinence. * **Weigert-Meyer Law:** 1. **Upper pole ureter:** Ectopic opening; prone to **obstruction/ureterocele**. 2. **Lower pole ureter:** Normal opening (but more lateral); prone to **vesicoureteral reflux (VUR)**. * **Embryology:** The ectopic ureter results from the ureteric bud arising too high on the Mesonephric duct, causing it to be incorporated later and lower into the urogenital sinus.

Question 1

What is the composition of this stone?

Accepted Answer

Calcium oxalate dihydrate

Answer

Calcium oxalate monohydrate

Answer

Ammonium urate

Answer

Calcium oxalate

Question 2

A 60-year-old male presents with a poor stream of urine, a post-void residual urine volume of 400 mL, bilateral hydronephrosis, and a prostate weighing 70 g. His urea is 120 mg/dL and creatinine is 3.5 mg/dL. What is the ideal next immediate step?

Accepted Answer

Catheterize with Foley catheter

Answer

Bilateral percutaneous nephrostomies

Answer

CT scan to rule out carcinoma

Answer

MRI pelvis

Question 3

What is the treatment of choice for ureteric colic?

Accepted Answer

None of the above

Answer

Nitrites

Answer

Pethidine

Answer

Adrenaline

Question 4

Which of the following substances is not used as an irrigant during transurethral resection of the prostate?

Accepted Answer

Normal Saline

Answer

1.5% Glycine

Answer

5% Dextrose

Answer

Distilled Water

Question 5

What is the most common long-term complication causing mortality after urinary diversion?

Accepted Answer

Renal failure due to pyelonephritis

Answer

Persistent electrolyte imbalance

Answer

Colonic carcinoma

Answer

Bilateral renal calculi

Question 6

A 'bag of worms' appearance in the scrotum is typically associated with which condition?

Accepted Answer

Varicocele

Answer

Spermatocele

Answer

Inguinal hernia

Answer

Hydrocele

Question 7

Subcapsular nephrectomy is indicated in which of the following conditions?

Accepted Answer

Pyonephrosis

Answer

Perinephric abscess

Answer

Hydronephrosis

Answer

Polycystic kidney disease

Question 8

Which of the following symptoms does not typically improve following a Transurethral Resection of the Prostate (TURP)?

Accepted Answer

Post-micturition dribble

Answer

Nocturia

Answer

Incomplete emptying

Answer

Urge incontinence

Question 9

What is the most common testicular tumor of childhood?

Accepted Answer

Embryonal carcinoma

Answer

Teratoma

Answer

Seminoma

Answer

Choriocarcinoma

Question 10

A 9-year-old boy presented with abdominal pain and recurrent UTI. IVP revealed duplication of the left ureter. What is the most likely site of ectopic opening?

Accepted Answer

Prostatic urethra

Answer

Ejaculatory duct

Answer

Seminal vesicle

Answer

Vas deferens

Urology — MCQs

Urology — MCQs

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