Urology Practice Questions

Q: Which type of kidney stone is most sensitive to extracorporeal shock wave lithotripsy (ESWL)?

Uric acid stone. **Explanation:** The sensitivity of a kidney stone to **Extracorporeal Shock Wave Lithotripsy (ESWL)** is primarily determined by its **Hounsfield Unit (HU)** value on CT scan and its crystalline structure. Stones with lower density and higher fragility fragment more easily. **Why Uric Acid is the Correct Answer:** Uric acid stones are the most "fragile" or sensitive to ESWL. They have a low density (typically <500 HU) and a non-compact crystalline structure, allowing shock waves to propagate through and shatter them effectively. While uric acid stones are often managed medically via urinary alkalinization (dissolution therapy), if ESWL is performed, they fragment with the least amount of energy. **Analysis of Incorrect Options:** * **Calcium Oxalate:** These are the most common stones. **Calcium oxalate dihydrate** stones are relatively sensitive, but **Calcium oxalate monohydrate** stones are very dense (>1000 HU) and notoriously resistant to ESWL. * **Struvite (Triple Phosphate):** These are associated with infections (Proteus). While they are relatively soft, they are often large (Staghorn calculi), making ESWL less effective as a monotherapy due to the high stone burden and risk of "Steinstrasse." * **Cystine Stone:** These are the **most resistant** to ESWL. They have a "waxy" consistency and a dense crystalline lattice that absorbs shock waves rather than fracturing. **NEET-PG High-Yield Pearls:** * **Order of ESWL Sensitivity:** Uric Acid > Calcium Oxalate Dihydrate > Struvite > Calcium Oxalate Monohydrate > Cystine (Least sensitive). * **Size Limit:** ESWL is generally preferred for stones ** 2 cm or lower pole stones >1 cm, PCNL is the gold standard. * **Contraindications for ESWL:** Pregnancy, uncorrected bleeding diathesis, distal obstruction, and uncontrolled UTI. * **Steinstrasse:** A complication of ESWL where fragmented stone gravel blocks the ureter ("stone street").

Q: After vasectomy, when does azoospermia become evident?

10 to 12 weeks. **Explanation:** The correct answer is **10 to 12 weeks**. **1. Underlying Medical Concept:** Vasectomy involves the occlusion or transection of the vas deferens to prevent sperm from entering the ejaculate. However, sterility is **not immediate**. Sperm already present in the reproductive tract distal to the site of ligation (the ampulla of the vas and the seminal vesicles) must be cleared through subsequent ejaculations. On average, it takes approximately **15 to 20 ejaculations** or a duration of **10 to 12 weeks** to achieve complete azoospermia. **2. Analysis of Options:** * **A & B (2 to 6 weeks):** These timeframes are too short. While the sperm count begins to drop immediately, residual viable sperm remain in the distal segments, posing a high risk of pregnancy if alternative contraception is not used. * **C (8 to 10 weeks):** While some patients may achieve azoospermia by this point, standard clinical guidelines (such as those from the AUA and BAUS) emphasize waiting until at least 12 weeks to ensure a "clear" sample in the majority of the population. **3. High-Yield Clinical Pearls for NEET-PG:** * **Post-Vasectomy Semen Analysis (PVSA):** This is the gold standard to confirm success. It is typically performed at **12 weeks** post-procedure. * **Contraception:** Patients must be strictly advised to use alternative contraceptive methods until **two consecutive semen analyses** show zero sperm (azoospermia). * **Recanalization:** Spontaneous recanalization is a rare cause of early or late failure. * **Most Common Complication:** Scrotal hematoma is the most common early complication; sperm granuloma is a common late finding. **Conclusion:** For the purpose of NEET-PG, remember the "Rule of 12": 12 weeks or roughly 20 ejaculations are required before a patient can be declared sterile.

Q: During renal transplantation, to which vessel is the renal vein connected?

External Iliac Vein. **Explanation:** In clinical renal transplantation, the donor kidney is typically placed in the **iliac fossa** (heterotopic transplantation). This location is preferred because it provides easy access to the bladder and major pelvic vessels. **1. Why External Iliac Vein is Correct:** The standard surgical technique involves performing vascular anastomoses to the iliac vessels. The **donor renal vein** is most commonly anastomosed to the **External Iliac Vein (EIV)** in an end-to-side fashion. This is because the EIV is easily accessible, has a large caliber, and lies superficially in the iliac fossa, making the venous drainage efficient. **2. Analysis of Incorrect Options:** * **Inferior Vena Cava (IVC):** While the native kidneys drain into the IVC, it is located too high (retroperitoneal) for a standard pelvic transplant. IVC anastomosis is generally reserved for pediatric recipients or specific complex cases. * **Internal Iliac Vein:** This vessel is deeper and more difficult to access than the external iliac vein. While the **Internal Iliac Artery** was historically used for the arterial anastomosis (end-to-end), the vein of choice remains the External Iliac. * **Gonadal Vein:** This vessel is far too small in caliber to accommodate the high-volume venous return from a transplanted kidney. **3. High-Yield Clinical Pearls for NEET-PG:** * **Arterial Anastomosis:** The donor renal artery is most commonly connected to the **External Iliac Artery** (end-to-side). Historically, the Internal Iliac Artery (end-to-end) was used. * **Ureteric Reimplantation:** The donor ureter is connected to the recipient's bladder using the **Lich-Gregoir technique** (extravesical ureteroneocystostomy). * **Side Selection:** Usually, the **left donor kidney** is preferred (due to a longer renal vein), but it is placed in the **right iliac fossa** of the recipient to allow the renal pelvis and ureter to lie anteriorly.

Q: Which of the following statements about ureteral duplication is false?

It is typically unilateral.. ### Explanation: Ureteral Duplication Ureteral duplication is the most common congenital anomaly of the urinary tract. Understanding its epidemiology and anatomical rules is crucial for NEET-PG. **Why Option D is the Correct (False) Statement:** Ureteral duplication is **more commonly bilateral** than unilateral. While it can occur on one side, clinical studies and radiological findings indicate a higher prevalence of bilateral involvement in affected individuals. Therefore, stating it is "typically unilateral" is factually incorrect. **Analysis of Other Options:** * **Option A (Females affected more commonly):** This is **true**. There is a strong female predilection, with a female-to-male ratio of approximately 2:1. * **Option B (Follows Weigert-Meyer Rule):** This is **true**. In a complete duplication, the **upper pole ureter** opens ectopically (inferior and medial to the normal orifice) and often ends in a **ureterocele**, while the **lower pole ureter** opens orthotopically (superior and lateral) and is prone to **vesicoureteral reflux (VUR)**. * **Option C (Autosomal Dominant Inheritance):** This is **true**. Ureteral duplication often shows a familial pattern, most commonly inherited in an autosomal dominant fashion with incomplete penetrance. ### High-Yield Clinical Pearls for NEET-PG: * **Weigert-Meyer Rule:** Remember "Upper-Ectopic/Ureterocele" and "Lower-Reflux." * **Most common presentation:** Often asymptomatic, but if symptomatic, it presents with recurrent UTIs or urinary incontinence (in females with an ectopic ureter opening distal to the sphincter). * **Diagnosis:** Voiding Cystourethrogram (VCUG) is the gold standard for diagnosing associated VUR, while IVP or MRU can delineate the anatomy.

Q: A patient with Stage II Transitional Cell carcinoma of the bladder presents with hematuria. Which of the following statements regarding the management of her condition is true?

Radical cystectomy is indicated.. ### Explanation **1. Why Radical Cystectomy is the Correct Answer:** Bladder cancer staging is the primary determinant of management. **Stage II (T2)** Transitional Cell Carcinoma (TCC) signifies **Muscle-Invasive Bladder Cancer (MIBC)**, where the tumor has invaded the muscularis propria. For fit patients with MIBC, the gold standard treatment is **Radical Cystectomy** with pelvic lymph node dissection and urinary diversion. This aggressive approach is necessary because muscle invasion significantly increases the risk of lymphatic spread and systemic metastasis. **2. Analysis of Incorrect Options:** * **Option A:** Cystoscopic fulguration or Transurethral Resection of Bladder Tumor (TURBT) is the standard for **Non-Muscle Invasive Bladder Cancer (NMIBC)** (Stages Ta, T1, or CIS). It is insufficient for Stage II as it cannot ensure complete clearance of deep muscle invasion. * **Option C:** **Smoking** is the most significant risk factor for TCC, increasing the risk 3–4 fold. Other risk factors include exposure to aromatic amines (aniline dyes) and Schistosomiasis (associated with Squamous Cell Carcinoma). * **Option D:** Chemotherapy plays a vital role. **Neoadjuvant Chemotherapy (NAC)** (cisplatin-based) followed by radical cystectomy is the current standard of care for Stage II-III disease, as it improves overall survival compared to surgery alone. **3. Clinical Pearls for NEET-PG:** * **Most common symptom:** Painless gross hematuria (found in 85% of cases). * **Standard of Diagnosis:** Cystoscopy with biopsy. * **Radical Cystectomy boundaries:** In males, it includes the bladder, prostate, and seminal vesicles. In females, it includes the bladder, urethra, uterus, ovaries, and anterior vaginal wall. * **BCG Vaccine:** Used intravesically for high-grade NMIBC (Stage T1/CIS) to prevent recurrence, but not for Stage II.

Question 1

In pelvi-ureteric junction (PUJ) obstruction causing hydronephrosis, which of the following statements is false?

Accepted Answer

If there is more than 5 percent of function in the obstructed kidney, a procedure to preserve the kidney is carried out

Answer

The condition may be asymptomatic

Answer

It can be diagnosed in utero

Answer

Ultrasound scanning is the least invasive method of imaging

Question 2

Referred pain from which of the following conditions may be felt along the inner side of the right thigh?

Accepted Answer

Pelvic abscess

Answer

Inflamed pelvic appendix

Answer

Inflamed ovaries

Answer

Stone in pelvic ureter

Question 3

Which type of kidney stone is most sensitive to extracorporeal shock wave lithotripsy (ESWL)?

Accepted Answer

Uric acid stone

Answer

Calcium oxalate stone

Answer

Struvite (triple phosphate) stone

Answer

Cystine stone

Question 4

What is the standard treatment for Stage II testicular teratoma?

Accepted Answer

Orchidectomy + Retroperitoneal Lymph Node Dissection (RPLND)

Answer

Orchidectomy + Chemotherapy

Answer

Orchidectomy

Answer

Radiotherapy

Question 5

Which of the following is true about the apocrine gland?

Accepted Answer

It is a modified sweat gland.

Answer

It is a modified sebaceous gland.

Answer

It is present in the axilla and groin.

Answer

Hidradenitis suppurativa is an infection of the apocrine gland.

Question 6

What is the most common cause of nephrolithiasis?

Accepted Answer

Idiopathic hypercalciuria

Answer

Hypocitraturia

Answer

Hyperoxaluria

Answer

Hyperuricosuria

Question 7

After vasectomy, when does azoospermia become evident?

Accepted Answer

10 to 12 weeks

Answer

2 to 3 weeks

Answer

4 to 6 weeks

Answer

8 to 10 weeks

Question 8

During renal transplantation, to which vessel is the renal vein connected?

Accepted Answer

External Iliac Vein

Answer

Inferior Vena Cava (IVC)

Answer

Internal Iliac Vein

Answer

Gonadal Vein

Question 9

Which of the following statements about ureteral duplication is false?

Accepted Answer

It is typically unilateral.

Answer

Females are affected more commonly.

Answer

It follows the Weigert-Meyer rule.

Answer

It is inherited in an autosomal dominant pattern.

Question 10

A patient with Stage II Transitional Cell carcinoma of the bladder presents with hematuria. Which of the following statements regarding the management of her condition is true?

Accepted Answer

Radical cystectomy is indicated.

Answer

Cystoscopic fulguration is the standard treatment.

Answer

History of smoking is not a risk factor.

Answer

Chemotherapy has no role in management.

Urology — MCQs

Urology — MCQs

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