Urology Practice Questions

Q: Most radiosensitive testicular tumour is:

Seminoma. **Explanation:** **1. Why Seminoma is the correct answer:** Seminoma is the most common germ cell tumor (GCT) of the testis and is uniquely characterized by its extreme **radiosensitivity**. The underlying medical concept is that seminoma cells have a high rate of apoptosis when exposed to ionizing radiation. This property allows low-dose radiotherapy to be a highly effective treatment modality, particularly for Stage I and II disease, often leading to a cure rate exceeding 95%. **2. Why the other options are incorrect:** * **Teratoma:** These are Non-Seminomatous Germ Cell Tumors (NSGCTs). Teratomas are notoriously **radioresistant** and chemoresistant. The primary treatment is surgical excision (Retroperitoneal Lymph Node Dissection - RPLND). * **Interstitial Tumors (Leydig/Sertoli cell tumors):** These are non-germ cell stromal tumors. They are generally resistant to radiation and are managed primarily through radical orchidectomy. * **Lymphoma:** While lymphomas are generally radiosensitive, in the context of primary testicular tumors, Seminoma remains the classic answer for the "most radiosensitive" primary GCT. Furthermore, testicular lymphoma is the most common testicular tumor in men over 60, but its management is primarily systemic chemotherapy. **3. Clinical Pearls for NEET-PG:** * **Most common testicular tumor:** Seminoma (overall), but Lymphoma in men >60 years. * **Tumor Markers:** Seminomas may show elevated **hCG** (in 10-15% of cases) but **never** elevated Alpha-Fetoprotein (AFP). If AFP is elevated, it is by definition an NSGCT. * **Best Prognosis:** Seminoma (due to slow growth and high radio/chemosensitivity). * **Characteristic Pathology:** Large cells with clear cytoplasm ("fried egg" appearance) and fibrous septa infiltrated with lymphocytes.

Q: What is the best indication for testicular biopsy in a male?

Azoospermia. ### Explanation The primary clinical utility of a testicular biopsy is to differentiate between **obstructive** and **non-obstructive (secretory) azoospermia**. **1. Why Azoospermia is the Correct Answer:** Azoospermia is defined as the total absence of spermatozoa in the ejaculate (confirmed on two separate semen analyses). When a patient has azoospermia but clinical findings (like normal testicular volume and FSH levels) are borderline, a biopsy is the definitive tool to determine if the "factory" is working. * If the biopsy shows **normal spermatogenesis**, the diagnosis is **Obstructive Azoospermia** (e.g., CBAVD, post-inflammatory ductal blockage). * If the biopsy shows **arrested development or Sertoli-cell-only syndrome**, the diagnosis is **Non-obstructive Azoospermia**. **2. Why Other Options are Incorrect:** * **Polyspermia (A):** An abnormally high sperm count (>250 million/mL). It rarely requires invasive investigation as it is not a common cause of infertility. * **Oligospermia (B):** Low sperm count (<15 million/mL). Management usually focuses on hormonal assays, lifestyle changes, or varicocele repair rather than biopsy, as sperm are still being produced and transported. * **Necrospermia (C):** A condition where sperm are present but dead/non-motile. This is usually due to infections, antisperm antibodies, or epididymal issues, not a primary failure of testicular production. **Clinical Pearls for NEET-PG:** * **Prerequisite:** Before a biopsy, always check **FSH levels**. If FSH is significantly elevated (>2x normal) and testes are small/firm, it indicates primary testicular failure, making a biopsy unnecessary. * **Standard Site:** The biopsy is typically taken from the **upper pole** of the testis to avoid injury to the epididymis. * **Modern Practice:** Diagnostic biopsy is often replaced by **Testicular Sperm Extraction (TESE)**, which combines diagnosis with sperm retrieval for ICSI.

Q: A 12-year-old boy presents with acute onset of painful scrotal swelling. What is the immediate management?

Perform Doppler ultrasound. **Explanation:** The clinical presentation of acute onset painful scrotal swelling in a 12-year-old boy must be treated as **Testicular Torsion** until proven otherwise. Testicular torsion is a surgical emergency where the spermatic cord twists, leading to ischemia and potential necrosis of the testis. **Why Option A is Correct:** **Color Doppler Ultrasound** is the gold standard initial investigation for an acute scrotum. It has high sensitivity and specificity to assess blood flow. A finding of absent or decreased flow confirms torsion, while increased flow suggests inflammatory conditions like epididymo-orchitis. In a clinical setting, if Doppler is unavailable and suspicion is high, immediate surgical exploration is indicated. **Why Other Options are Incorrect:** * **B & C (Analgesics/Bed Rest):** These are supportive measures but do not address the underlying mechanical obstruction. Delaying diagnosis to provide symptomatic relief increases the risk of testicular loss (the "golden period" for salvage is within 6 hours). * **D (Antibiotics):** These are used for epididymo-orchitis. While epididymo-orchitis also causes painful swelling, it is more common in post-pubertal males and usually presents with fever and pyuria. Treating empirically with antibiotics without ruling out torsion can lead to testicular gangrene. **High-Yield Clinical Pearls for NEET-PG:** * **Golden Period:** Testicular salvage rate is ~100% if detorsion occurs within 6 hours, dropping to <10% after 24 hours. * **Prehn’s Sign:** Elevation of the scrotum relieves pain in epididymitis but **not** in torsion (Negative Prehn's sign). * **Cremasteric Reflex:** Usually **absent** in testicular torsion; its presence makes torsion unlikely. * **Deformity:** Torsion is often associated with a "Bell-clapper deformity" (high-riding, horizontal testis).

Q: A 65-year-old male presents with a lump on the lower back, hematuria, weight loss, and night sweats. Investigations reveal an 8 cm renal cell carcinoma involving abdominal lymph nodes, but no distant metastasis. What is the most appropriate management for this patient?

Radical nephrectomy. ### Explanation **Correct Option: D. Radical Nephrectomy** The patient presents with the classic triad of Renal Cell Carcinoma (RCC)—flank mass, hematuria, and weight loss—along with constitutional symptoms. The tumor is 8 cm (Stage T3a or higher depending on invasion) with regional lymph node involvement but **no distant metastasis**. For **localized or locally advanced RCC (Stage I, II, and III)**, the gold standard and definitive treatment is **Radical Nephrectomy**. Unlike many other solid tumors, RCC is notoriously **resistant to chemotherapy and radiation**. Therefore, surgical excision of the kidney, Gerota’s fascia, and regional lymph nodes remains the primary curative modality. Even in the presence of nodal involvement (Stage III), surgery offers the best chance for survival and symptom control. **Why other options are incorrect:** * **A & C (Radiation):** RCC is a **radioresistant** tumor. Radiation is never the primary treatment; it is reserved only for palliation of painful bone metastases or brain involvement. * **B (Chemotherapy):** RCC is highly **chemoresistant** due to the high expression of the MDR-1 (multidrug resistance) gene. If systemic therapy is needed (Stage IV), targeted immunotherapy (e.g., Sunitinib, Pembrolizumab) is used, not conventional chemotherapy. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Hematuria, flank pain, and palpable mass (seen in only 10% of cases, usually signifies advanced disease). * **Most common histological type:** Clear cell RCC (arises from Proximal Convoluted Tubule). * **Staging Tip:** T1 is ≤7 cm; T2 is >7 cm (limited to kidney). This patient’s 8 cm tumor is at least T2. * **Robson’s Classification:** Historically used for RCC staging, though TNM is now preferred. * **Paraneoplastic Syndromes:** RCC is the "Internist's Tumor" (can cause polycythemia, hypercalcemia, and hypertension).

Q: A 50-year-old male with a positive family history of prostate cancer presents for screening. What is the most sensitive screening test to detect prostate cancer?

Digital Rectal Examination (DRE) combined with PSA test. **Explanation:** The screening for prostate cancer relies on the principle of maximizing sensitivity to detect the disease at an early, treatable stage. **Why Option C is correct:** The combination of **Digital Rectal Examination (DRE) and Prostate-Specific Antigen (PSA)** is the most sensitive screening approach. While PSA is a highly sensitive organ-specific marker, it can be elevated in benign conditions (BPH, prostatitis). Conversely, some aggressive cancers do not significantly raise PSA levels but can be detected as palpable nodules on DRE. Using both tests together compensates for the limitations of each, significantly increasing the **Positive Predictive Value (PPV)** and overall detection rate compared to using either test alone. **Why other options are incorrect:** * **Option A (DRE alone):** Has low sensitivity as it only detects tumors in the posterior and lateral aspects of the gland that are large enough to be palpable. * **Option B (PSA alone):** While more sensitive than DRE, it lacks specificity and may miss small, palpable nodules that are not yet producing high systemic PSA levels. * **Option D (MRI):** While Multiparametric MRI (mpMRI) is excellent for localization and staging (PI-RADS scoring), it is not used as a primary screening tool due to high costs and lack of accessibility. **High-Yield Clinical Pearls for NEET-PG:** * **Age to start screening:** Usually 50 years for average risk; 45 years for high risk (positive family history or African American race). * **PSA Cut-off:** Generally >4 ng/mL is considered suspicious, but age-specific PSA ranges are more accurate. * **Free/Total PSA Ratio:** A ratio <10% suggests a higher risk of malignancy. * **Definitive Diagnosis:** Transrectal Ultrasound (TRUS) guided biopsy (usually 12-core biopsy) remains the gold standard for diagnosis.

Q: A 10-mm calculus in the right lower ureter associated with proximal hydroureteronephrosis is best treated with?

Ureteroscopic retrieval. The management of ureteral calculi is determined by the size, location, and presence of complications. In this case, the patient has a **10-mm calculus** in the **lower (distal) ureter** with associated **hydroureteronephrosis**, indicating significant obstruction. **Why Ureteroscopic Retrieval (URS) is correct:** For distal ureteral stones >10 mm, **Ureteroscopy (URS)** with laser lithotripsy or basket retrieval is the gold standard. It offers the highest stone-free rate (SFR) for the lower ureter compared to other modalities. Since there is proximal hydroureteronephrosis, URS allows for both immediate stone clearance and the placement of a Double-J (DJ) stent to relieve the obstruction. **Analysis of Incorrect Options:** * **A. Extracorporeal Shockwave Lithotripsy (ESWL):** While ESWL is non-invasive, its efficacy decreases for stones >10 mm and for those located in the distal ureter due to the "pelvic bone shield" effect, which makes targeting difficult. * **B. Antegrade Percutaneous Access:** This approach (PCNL) is typically reserved for large renal calculi (>2 cm) or proximal ureteral stones that cannot be reached retrogradely. It is unnecessarily invasive for a distal stone. * **C. Open Ureterolithotomy:** This is now considered a "last resort" procedure, reserved only for cases where endoscopic or laparoscopic methods fail or for exceptionally large, impacted complex stones. **Clinical Pearls for NEET-PG:** * **Stone Size:** Stones 10 mm rarely do [1]. * **Location Matters:** ESWL is preferred for upper ureteral stones <1 cm; URS is preferred for all distal ureteral stones. * **Medical Expulsive Therapy (MET):** Tamsulosin (Alpha-1 blocker) is the drug of choice to facilitate the passage of small distal stones by relaxing ureteral smooth muscle [1]. * **Narrowest part of the ureter:** The Vesicoureteric Junction (VUJ) is the most common site for stone impaction.

Q: Transurethral resection (T.U.R.) syndrome is due to which of the following electrolyte imbalances?

Hyponatremia. ### Explanation **TUR Syndrome** is a clinical complication that occurs during Transurethral Resection of the Prostate (TURP) due to the systemic absorption of large volumes of non-conductive irrigation fluids (such as Glycine, Sorbitol, or Mannitol) through opened prostatic venous sinuses [1]. #### 1. Why Hyponatremia is Correct The primary mechanism is **dilutional hyponatremia**. As the irrigation fluid enters the circulation, it expands the intravascular volume and dilutes the serum sodium concentration [1]. If glycine is used, its metabolism into ammonia can further contribute to neurological symptoms (encephalopathy). The rapid drop in sodium leads to cerebral edema, manifesting as confusion, seizures, and visual disturbances. #### 2. Analysis of Incorrect Options * **Hypokalemia:** While electrolyte shifts occur, potassium levels are generally stable or may even rise (hyperkalemia) if significant hemolysis occurs. It is not the hallmark of TUR syndrome. * **Hypovolemia:** TUR syndrome is characterized by **hypervolemia** (fluid overload) due to the massive absorption of irrigation fluid, which can lead to hypertension and pulmonary edema [1]. * **Hypoxia:** While hypoxia can occur secondary to pulmonary edema (left heart failure from fluid overload), it is a late-stage complication rather than the primary electrolyte trigger. #### 3. NEET-PG High-Yield Pearls * **Classic Triad:** Hypertension (with bradycardia), mental status changes, and visual disturbances. * **Fluid Choice:** Glycine 1.5% is most commonly used but carries the risk of ammonia toxicity and transient blindness. * **Prevention:** Limit resection time to <60 minutes and keep the irrigation bag height <60 cm above the patient. * **Treatment:** Fluid restriction and loop diuretics for mild cases; **Hypertonic saline (3% NaCl)** for severe, symptomatic hyponatremia [1].

Question 1

Most radiosensitive testicular tumour is:

Accepted Answer

Seminoma

Answer

Teratoma

Answer

Interstitial tumours

Answer

Lymphoma

Question 2

What is the best indication for testicular biopsy in a male?

Accepted Answer

Azoospermia

Answer

Polyspermia

Answer

Oligospermia

Answer

Necrospermia

Question 3

A 12-year-old boy presents with acute onset of painful scrotal swelling. What is the immediate management?

Accepted Answer

Perform Doppler ultrasound

Answer

Administer analgesics

Answer

Prescribe bed rest

Answer

Initiate antibiotics

Question 4

A 65-year-old male presents with a lump on the lower back, hematuria, weight loss, and night sweats. Investigations reveal an 8 cm renal cell carcinoma involving abdominal lymph nodes, but no distant metastasis. What is the most appropriate management for this patient?

Accepted Answer

Radical nephrectomy

Answer

Radiation followed by nephrectomy

Answer

Chemotherapy

Answer

Radiation

Question 5

A 50-year-old male with a positive family history of prostate cancer presents for screening. What is the most sensitive screening test to detect prostate cancer?

Accepted Answer

Digital Rectal Examination (DRE) combined with PSA test

Answer

Digital Rectal Examination (DRE)

Answer

Prostate-Specific Antigen (PSA) test

Answer

Endorectal Coil MRI with T1W and T2W images

Question 6

A 10-mm calculus in the right lower ureter associated with proximal hydroureteronephrosis is best treated with?

Accepted Answer

Ureteroscopic retrieval

Answer

Extracorporeal shockwave lithotripsy

Answer

Antegrade percutaneous access

Answer

Open ureterolithotomy

Question 7

Transurethral resection (T.U.R.) syndrome is due to which of the following electrolyte imbalances?

Accepted Answer

Hyponatremia

Answer

Hypokalemia

Answer

Hypovolemia

Answer

Hypoxia

Question 8

Ectopic ureter is most commonly associated with which of the following?

Accepted Answer

Hydronephrosis

Answer

Oliguria

Answer

Bilateral hydroureter

Answer

All of the above

Question 9

Which of the following statements is true regarding testicular tumors?

Accepted Answer

None of the above statements are true.

Answer

Embryonal cell carcinomas occur in approximately 95% of cases.

Answer

Testicular tumors are bilateral in up to 10% of cases.

Answer

Teratomas are more common than seminomas.

Question 10

What is the treatment of choice for a 4cm retroperitoneal lymph node mass in a patient with non-seminomatous germ cell tumor of the testis?

Accepted Answer

High orchidectomy plus retroperitoneal lymph node dissection (RPLND)

Answer

Radical radiotherapy alone

Answer

Retroperitoneal lymph node dissection (RPLND) alone

Answer

High orchidectomy alone

Urology — MCQs

Urology — MCQs

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