Urology Practice Questions

Q: A middle-aged diabetic female presented with flank pain and fever. On ultrasound, the kidney was irregular and showed fat density with calculi. What is the most probable diagnosis?

Xanthogranulomatous pyelonephritis. **Explanation:** The clinical presentation of a middle-aged diabetic female with fever, flank pain, and specific imaging findings is classic for **Xanthogranulomatous Pyelonephritis (XGP)**. **1. Why Option B is Correct:** XGP is a chronic inflammatory process characterized by the destruction of renal parenchyma and its replacement with lipid-laden foamy macrophages (**xanthoma cells**). * **The "Fat Density":** On imaging (USG/CT), these lipid-laden macrophages appear as areas of fat density, which is a pathognomonic finding. * **The "Calculi":** XGP is almost always associated with chronic urinary obstruction, often due to a large **staghorn calculus** (Proteus or E. coli infections). * **Demographics:** It most commonly affects middle-aged women, particularly those with diabetes. **2. Why Other Options are Incorrect:** * **A. Tuberculosis of Kidney:** While it causes chronic inflammation and "putty kidney" (calcification), it does not typically present with fat-density replacement of the parenchyma. * **C. Chronic Pyelonephritis:** This leads to a small, scarred, shrunken kidney with blunted calyces, but it lacks the specific "fat-density" masses seen in XGP. * **D. Renal Abscess:** This presents as a localized fluid collection (pus) with a thick wall. While it causes fever and pain, it does not explain the presence of diffuse fat density and chronic calculi. **Clinical Pearls for NEET-PG:** * **"Bear’s Paw Sign":** On CT, the cross-sectional appearance of dilated calyces surrounding a central calcification in XGP is known as the Bear’s Paw sign. * **The Great Mimicker:** XGP is often mistaken for Renal Cell Carcinoma (RCC) because it can be locally invasive. * **Treatment:** The gold standard treatment for the diffuse form is **Nephrectomy**.

Q: A prenatal ultrasound showed bilateral hydronephrosis in a male fetus. A repeat ultrasound scan done a few days later showed bilateral hydronephrosis with a full bladder and reduced amniotic fluid. An emergency Cesarean section was conducted. What is the first likely investigation for the newborn?

Micturating Cystourethrogram. **Explanation:** The clinical presentation of a male fetus with **bilateral hydronephrosis, a distended (full) bladder, and oligohydramnios** (reduced amniotic fluid) is the classic triad for **Posterior Urethral Valves (PUV)**. PUV is the most common cause of bladder outlet obstruction in male newborns and represents a urological emergency. 1. **Why Micturating Cystourethrogram (MCUG) is correct:** MCUG is the **gold standard** and the investigation of choice for diagnosing PUV. It confirms the diagnosis by demonstrating a dilated posterior urethra, a "valve" member, and a thick-walled, trabeculated bladder. It also helps assess for associated Vesicoureteral Reflux (VUR), which occurs in nearly 50% of these cases. 2. **Why other options are incorrect:** * **Ultrasonography (USG):** While USG is the initial screening tool (often showing the "keyhole sign"), it cannot definitively diagnose the cause of obstruction or differentiate between PUV and other conditions like prune belly syndrome. * **DMSA Scan:** This is a nuclear medicine scan used to detect renal scarring or functional cortical mass. It is not used in the acute diagnostic phase of outlet obstruction. * **Renal Doppler:** This assesses blood flow to the kidneys (e.g., renal artery stenosis) and has no role in diagnosing anatomical bladder outlet obstructions. **Clinical Pearls for NEET-PG:** * **Keyhole Sign:** On prenatal USG, the dilated posterior urethra and thick-walled bladder resemble a keyhole; this is highly suggestive of PUV. * **Initial Management:** The first step in management after birth is **bladder catheterization** (using a small feeding tube) to decompress the system, followed by an MCUG for diagnosis. * **Definitive Treatment:** Primary endoscopic fulguration of the valves. * **Potter Sequence:** Severe oligohydramnios due to PUV can lead to pulmonary hypoplasia, the most common cause of death in these neonates.

Q: Which of the following is NOT true about torsion of the testis?

Is commonly associated with pyuria.. **Explanation:** Testicular torsion is a surgical emergency caused by the twisting of the spermatic cord, leading to vascular compromise and potential infarction of the testis. **Why Option B is the Correct Answer (The False Statement):** Pyuria (pus cells in urine) is a hallmark of **Urinary Tract Infection (UTI) or Acute Epididymo-orchitis**, which is the primary differential diagnosis for torsion. Testicular torsion is a mechanical/vascular event, not an infectious one; therefore, the urinalysis is typically normal. The presence of pyuria strongly points away from torsion and toward an inflammatory etiology. **Analysis of Incorrect Options (True Statements):** * **Option A:** Torsion typically presents with a **sudden, agonizing onset of pain** in the groin or lower abdomen, often associated with nausea and vomiting. * **Option C:** **Color Doppler Ultrasound** is the investigation of choice. A positive finding for torsion is the absence or significant reduction of arterial blood flow to the affected testis. * **Option D:** Torsion often occurs due to a congenital anatomical anomaly known as the **"Bell-clapper deformity"** (high investment of tunica vaginalis). Since this anatomical defect is usually bilateral, **prophylactic contralateral orchidopexy** is mandatory to prevent future torsion on the opposite side. **High-Yield Clinical Pearls for NEET-PG:** * **Golden Period:** Salvage rate is nearly 100% if detorsion occurs within **6 hours**; it drops to <10% after 24 hours. * **Prehn’s Sign:** Negative in torsion (pain is not relieved by elevating the testis) but positive in epididymo-orchitis. * **Cremasteric Reflex:** Characteristically **absent** in testicular torsion. * **Angel’s Sign:** The affected testis lies in a high, horizontal position.

Q: What is the period of trial required for maximum response when treating benign prostatic hyperplasia with finasteride?

6 months. **Explanation:** **Finasteride** is a 5-alpha reductase inhibitor (5-ARI) used in the management of Benign Prostatic Hyperplasia (BPH). Its mechanism involves inhibiting the conversion of testosterone to dihydrotestosterone (DHT), the primary androgen responsible for prostatic growth. **Why 6 months is correct:** Unlike Alpha-blockers (e.g., Tamsulosin), which provide rapid symptomatic relief by relaxing smooth muscles, 5-ARIs work by inducing **epithelial atrophy**, leading to a physical reduction in prostate volume (approximately 20–25%). This process is slow and time-dependent. Clinical studies demonstrate that while some improvement may be seen earlier, it takes **6 months** of continuous therapy to achieve the **maximum clinical response** and significant reduction in prostate size. **Analysis of Incorrect Options:** * **1 month (A):** Too short for any significant structural change or volume reduction. * **3 months (B):** Onset of action begins, but peak efficacy regarding symptom score improvement and flow rate is not yet reached. * **18 months (D):** While the drug is taken long-term to prevent progression, the "trial period" to assess maximum initial response is established at 6 months. **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** Best suited for patients with large prostates (**>30-40 grams**). * **PSA Effect:** Finasteride reduces serum PSA levels by **50%**. For screening purposes, the measured PSA in a patient on Finasteride should be **doubled** to estimate the true value. * **Clinical Benefits:** Reduces the risk of acute urinary retention (AUR) and the need for surgical intervention (TURP). * **Side Effects:** Erectile dysfunction, decreased libido, and gynecomastia.

Q: What is the sentinel lymph node for carcinoma of the penis called?

Cloquet's node. **Explanation:** **Correct Answer: C. Cloquet’s node** The lymphatic drainage of the penis primarily occurs via the superficial and deep inguinal lymph nodes. The **sentinel lymph node** for carcinoma of the penis is **Cloquet’s node** (also known as Rosenmüller’s node). It is the highest of the deep inguinal lymph nodes, located within the femoral canal, medial to the femoral vein and just below the inguinal ligament. It serves as a critical clinical marker; if this node is involved, it indicates a high likelihood of spread to the pelvic (iliac) lymph nodes. **Analysis of Incorrect Options:** * **A. Delphian node:** This is a midline prelaryngeal lymph node located on the cricothyroid membrane. It is the sentinel node for **carcinoma of the thyroid** and larynx. * **B. Darwin’s node:** This is not a lymph node. It is a congenital ear condition (Darwin's tubercle), a cartilaginous protuberance on the helix of the ear. * **C. Virchow’s node:** Also known as the "Signal node," this is a left supraclavicular lymph node. Its enlargement (Troisier’s sign) is classically associated with **metastatic gastric cancer** and other abdominal malignancies. **High-Yield Clinical Pearls for NEET-PG:** * **Drainage Pattern:** Glans penis and distal urethra drain directly to **deep inguinal nodes** (including Cloquet’s), while the skin of the penis drains to **superficial inguinal nodes**. * **Cabanas' Node:** Historically, a specific superficial inguinal node was called the sentinel node by Cabanas, but modern surgical practice identifies the **deep inguinal nodes (Cloquet’s)** as the more reliable sentinel indicators. * **EAU Guidelines:** In penile cancer, if inguinal nodes are non-palpable (cN0), Dynamic Sentinel Node Biopsy (DSNB) is the gold standard for staging.

Q: Which of the following is not an appropriate investigation for anterior urethral stricture?

Magnetic Resonance Imaging. **Explanation:** The diagnosis and evaluation of an **anterior urethral stricture** focus on defining the location, length, and depth of the stricture. **Why MRI is the correct answer (Not appropriate):** While MRI (specifically MR Urethrography) can provide detailed images of the pelvic anatomy, it is **not** a routine or appropriate investigation for anterior urethral strictures. It is expensive, time-consuming, and offers no significant advantage over conventional imaging for the anterior segment. MRI is generally reserved for complex **posterior** urethral distractions (e.g., pelvic fracture urethral injuries) to assess prostatic displacement and fibrosis. **Analysis of other options:** * **Retrograde Urethrogram (RGU):** This is the **gold standard** for evaluating anterior urethral strictures. It accurately defines the site and length of the stricture by injecting contrast through the meatus. * **Micturating Cystourethrogram (MCU/VCUG):** While RGU shows the distal end of a stricture, MCU is essential to visualize the **proximal** extent of the stricture and the posterior urethra during voiding. A combination of RGU + MCU is often used to map the stricture completely. * **High-frequency Ultrasound (Sonourethrography):** This is highly effective for the anterior urethra. It is the best modality to assess the degree of **spongiofibrosis** (scarring of the corpus spongiosum), which helps in planning the type of urethroplasty. **Clinical Pearls for NEET-PG:** * **Gold Standard for diagnosis:** Retrograde Urethrogram (RGU). * **Best for Spongiofibrosis:** Sonourethrography (USG). * **Most common site of post-inflammatory stricture:** Bulbar urethra. * **Most common cause of stricture (overall):** Iatrogenic (e.g., catheterization, transurethral surgery). * **Definitive Management:** Urethroplasty (End-to-end anastomosis for 2cm).

Q: Which of the following conditions is characterized by a "golf-hole ureter"?

Genitourinary Tuberculosis. **Explanation:** **Genitourinary Tuberculosis (GUTB)** is the correct answer. The "golf-hole ureter" is a classic cystoscopic finding in chronic renal tuberculosis. It occurs due to extensive fibrosis and cicatrization of the peri-ureteric tissues and the ureter itself. This scarring leads to a shortened, thickened, and rigid ureter that pulls the ureteric orifice upward and outward into a fixed, gaping, and dilated position, resembling a golf hole. **Analysis of Incorrect Options:** * **Ureterocele:** This is a cystic dilatation of the distal intramural ureter. On imaging (IVP), it typically presents with a **"Cobra-head"** or "Adder-head" appearance, not a gaping orifice. * **Vesicoureteric Reflux (VUR):** While VUR involves an incompetent ureterovesical junction, the characteristic cystoscopic finding is often a **"Stadium" or "Horseshoe"** shaped orifice, rather than the rigid, retracted "golf-hole" appearance of TB. * **Carcinoma of the Bladder:** This typically presents as a papillary or solid mass. While it can involve the ureteric orifice causing obstruction, it does not classically produce the specific retracted "golf-hole" morphology. **High-Yield Clinical Pearls for GUTB:** * **Most common site:** Kidney (via hematogenous spread); however, the **Epididymis** is the most common site of clinical presentation in males. * **Urinalysis:** Characterized by **"Sterile Pyuria"** (pus cells present, but routine cultures are negative). * **Putty Kidney:** Refers to autonephrectomy where the kidney becomes a small, shrunken, calcified sac. * **Thimble Bladder:** A small-capacity, fibrotic bladder resulting from chronic TB cystitis.

Question 1

Anorchia is best diagnosed by which of the following investigations?

Accepted Answer

Laparoscopy

Answer

Ultrasound (USG)

Answer

Single-photon emission computed tomography (SPECT)

Answer

Computed Tomography (CT)

Question 2

A middle-aged diabetic female presented with flank pain and fever. On ultrasound, the kidney was irregular and showed fat density with calculi. What is the most probable diagnosis?

Accepted Answer

Xanthogranulomatous pyelonephritis

Answer

Tuberculosis of kidney

Answer

Chronic pyelonephritis

Answer

Renal abscess

Question 3

A 40-year-old patient with a single kidney presents with a solitary exophytic mass of 4 cm localized at its lower pole. Which of the following is the best recommended management option?

Accepted Answer

Partial nephrectomy

Answer

Radical nephrectomy

Answer

Radical nephrectomy with dialysis

Answer

Radical nephrectomy with renal transplantation

Question 4

A prenatal ultrasound showed bilateral hydronephrosis in a male fetus. A repeat ultrasound scan done a few days later showed bilateral hydronephrosis with a full bladder and reduced amniotic fluid. An emergency Cesarean section was conducted. What is the first likely investigation for the newborn?

Accepted Answer

Micturating Cystourethrogram

Answer

Ultrasonography

Answer

DMSA Scan

Answer

Renal Doppler

Question 5

Which of the following is NOT true about torsion of the testis?

Accepted Answer

Is commonly associated with pyuria.

Answer

Presents with sudden pain in the testis.

Answer

Doppler ultrasound shows decreased blood flow to the testis.

Answer

Simultaneous orchidopexy of the contralateral testis should also be done.

Question 6

What is the period of trial required for maximum response when treating benign prostatic hyperplasia with finasteride?

Accepted Answer

6 months

Answer

1 month

Answer

3 months

Answer

18 months

Question 7

During an operation on an unstable, critically ill patient, the left ureter is lacerated through 50% of its circumference. If the patient's condition is too serious to allow time for definitive repair, what is an alternative method of management?

Accepted Answer

Ligation of the injured ureter and ipsilateral nephrostomy

Answer

Ipsilateral nephrectomy

Answer

Placement of a catheter from the distal ureter through an abdominal wall stab wound

Answer

Placement of a suction drain adjacent to the injury without further manipulation

Question 8

What is the sentinel lymph node for carcinoma of the penis called?

Accepted Answer

Cloquet's node

Answer

Delphian node

Answer

Darwin's node

Answer

Virchow's node

Question 9

Which of the following is not an appropriate investigation for anterior urethral stricture?

Accepted Answer

Magnetic Resonance Imaging

Answer

Retrograde urethrogram

Answer

Micturating cystourethrogram

Answer

High frequency ultrasound

Question 10

Which of the following conditions is characterized by a "golf-hole ureter"?

Accepted Answer

Genitourinary Tuberculosis

Answer

Ureterocele

Answer

Vesicoureteric reflux

Answer

Carcinoma of the bladder

Urology — MCQs

Urology — MCQs

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