Urology Practice Questions

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.

Q: A 55-year-old diabetic patient presented with impotence and a history of failure to achieve erection after papaverine intracavernous injection. Color Doppler shows no abnormality of arteries but shows mild venous run-off. What is the treatment of choice?

Vacuum constriction device. **Explanation:** The patient presents with organic erectile dysfunction (ED) characterized by **venous leak** (mild venous run-off on Doppler) and a failure to respond to intracavernous pharmacotherapy (papaverine). **1. Why Option C is Correct:** In patients who fail pharmacological therapy (intracavernous injections) or have contraindications to them, the **Vacuum Constriction Device (VCD)** is a highly effective, non-invasive second-line treatment. It works by creating a negative pressure vacuum that draws blood into the corpora cavernosa, which is then maintained by a constriction ring at the base of the penis. It is particularly useful in diabetic patients and those with venous leak, as the ring prevents the premature venous outflow described in the question. **2. Why the other options are incorrect:** * **Option A (Papaverine):** The patient has already failed this treatment ("history of failure to achieve erection after papaverine"). Repeating it would be ineffective. * **Option B (Penile Prosthetic Implants):** This is the "gold standard" for refractory ED, but it is considered a **third-line** surgical intervention. One should attempt non-invasive second-line options like VCD before proceeding to irreversible surgery. * **Option D (Psychotherapy):** This is indicated for psychogenic ED. The presence of diabetes and the Doppler finding of venous run-off confirm an **organic** etiology. **Clinical Pearls for NEET-PG:** * **First-line treatment for ED:** Oral PDE-5 inhibitors (e.g., Sildenafil). * **Venogenic ED:** Characterized by normal arterial inflow but inability to maintain an erection due to "venous leak." * **Contraindication for VCD:** Patients with blood dyscrasias or those on anticoagulants (risk of priapism/hematoma). * **Papaverine:** A non-specific PDE inhibitor; its main side effect is priapism and corporal fibrosis.

Question 1

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 2

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 3

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 4

Subcapsular nephrectomy is indicated in which of the following conditions?

Accepted Answer

Pyonephrosis

Answer

Perinephric abscess

Answer

Hydronephrosis

Answer

Polycystic kidney disease

Question 5

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 6

What is the most common testicular tumor of childhood?

Accepted Answer

Embryonal carcinoma

Answer

Teratoma

Answer

Seminoma

Answer

Choriocarcinoma

Question 7

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

Question 8

Which of the following statements regarding vasectomy is false?

Accepted Answer

Sperm production is completely stopped following the procedure.

Answer

Approximately 1 in 2000 men can become fertile again after the procedure.

Answer

Sperm granuloma is a common complication.

Answer

The procedure is typically performed under local anesthesia.

Question 9

A 55-year-old diabetic patient presented with impotence and a history of failure to achieve erection after papaverine intracavernous injection. Color Doppler shows no abnormality of arteries but shows mild venous run-off. What is the treatment of choice?

Accepted Answer

Vacuum constriction device

Answer

Intracavernous injection of papaverine

Answer

Penile prosthetic implants

Answer

Psychotherapy

Question 10

All are true regarding membranous urethral injury except?

Accepted Answer

It occurs due to a direct blow to the perineum.

Answer

High lying prostate is seen.

Answer

Pelvic hematoma occurs.

Answer

Urine collects in the perivesical space due to deep extravasation.

Urology — MCQs

Urology — MCQs

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