Urology Practice Questions

Q: What is the most probable cause for a 70-year-old man presenting with a testicular tumor?

Lymphoma. **Explanation:** The correct answer is **Lymphoma**. In the field of urology, the age of the patient is the most critical diagnostic clue when evaluating a testicular mass. **Why Lymphoma is Correct:** Testicular Lymphoma (specifically Diffuse Large B-Cell Lymphoma) is the **most common testicular tumor in men over the age of 60**. While primary germ cell tumors (GCTs) are common in younger populations, they are rare in the elderly. In a 70-year-old, any testicular enlargement should be considered lymphoma until proven otherwise. It is often bilateral (synchronous or metachronous) and carries a poor prognosis. **Why the Other Options are Incorrect:** * **Seminoma (A):** This is the most common overall primary germ cell tumor, but its peak incidence is between **30–40 years** of age. It is rare after age 50. * **Teratoma (C):** In adults, these are usually malignant components of mixed germ cell tumors, typically seen in the **20–30 year** age group. * **Choriocarcinoma (D):** This is a highly aggressive, rare tumor that usually presents in young adults (**20–30 years**) with early hematogenous metastasis (often presenting with hemoptysis). **High-Yield Clinical Pearls for NEET-PG:** * **Most common testicular tumor overall:** Seminoma. * **Most common testicular tumor in infants/children (<3 years):** Yolk Sac Tumor (Endodermal Sinus Tumor); characterized by Schiller-Duval bodies and elevated AFP. * **Most common bilateral testicular tumor:** Lymphoma. * **Tumor with highest elevation of hCG:** Choriocarcinoma. * **Reinke Crystals:** Pathognomonic for Leydig Cell Tumors.

Q: Antibodies against sperms may develop after which of the following procedures?

Vasectomy. **Explanation:** The development of anti-sperm antibodies (ASA) is primarily rooted in the disruption of the **Blood-Testis Barrier (BTB)**. Under normal physiological conditions, the BTB (formed by Sertoli cell tight junctions) isolates highly antigenic spermatozoa from the systemic immune system. **Why Vasectomy is the Correct Answer:** Vasectomy is the most common cause of ASA formation. Following the procedure, the proximal vas deferens and epididymis experience increased pressure, leading to the leakage of sperm antigens into the surrounding tissues and systemic circulation. The immune system recognizes these "sequestered antigens" as foreign, triggering the production of antibodies. Approximately **60–80% of men** develop circulating anti-sperm antibodies post-vasectomy, which is a significant factor in persistent infertility even after a successful surgical reversal (vasovasostomy). **Analysis of Incorrect Options:** * **Trauma & Infection:** While severe testicular trauma or infections (like mumps orchitis) *can* disrupt the BTB and lead to ASA, they are less consistent and less frequent causes compared to the definitive disruption caused by vasectomy. * **Orchidectomy:** This involves the complete removal of the testis. Since the source of the antigen (sperm) is removed, it does not typically lead to the systemic development of anti-sperm antibodies. **High-Yield Clinical Pearls for NEET-PG:** * **Types of ASA:** IgA and IgG are the most clinically significant. IgA antibodies on the sperm head interfere most with fertilization. * **Sperm Agglutination:** The presence of ASA causes sperm to clump together, reducing motility (Asthenozoospermia). * **Diagnosis:** The **Immunobead test** and **MAR (Mixed Antiglobulin Reaction) test** are the gold standards for detecting ASA on the sperm surface.

Q: In renal transplant, where is the graft typically placed?

Iliac fossa. In renal transplantation, the graft is typically placed in the **iliac fossa** (extraperitoneal). This is the standard surgical approach for several anatomical and clinical reasons: 1. **Vascular Access:** The iliac fossa provides easy access to the **iliac vessels** (external or internal iliac artery and vein) for vascular anastomosis. 2. **Ureteric Length:** Placing the kidney lower in the pelvis allows for a shorter ureteric length to reach the bladder (ureteroneocystostomy), significantly reducing the risk of ureteric ischemia and necrosis. 3. **Protection and Accessibility:** The iliac wing provides bony protection to the graft, while its superficial location makes it easily accessible for clinical examination and percutaneous ultrasound-guided biopsies. **Analysis of Incorrect Options:** * **Option A & C:** Placing the kidney in the **upper retroperitoneum** or the **normal anatomical site** (orthotopic) is technically difficult. It requires a much longer ureter and involves complex dissection of the deep-seated aorta and vena cava, increasing surgical morbidity. * **Option D:** Placement is not random; it must be extraperitoneal and proximal to the bladder and major pelvic vessels for functional success. **High-Yield Facts for NEET-PG:** * **Side of Placement:** Usually, the **right iliac fossa** is preferred (even for a left donor kidney) because the right iliac vein is more superficial and horizontal, making the venous anastomosis easier. * **Vascular Connections:** Most commonly, the renal artery is anastomosed to the **Internal Iliac Artery** (end-to-end) or **External Iliac Artery** (end-to-side). * **Heterotopic Transplantation:** Renal transplant is a classic example of heterotopic transplantation (placed in a site different from the original).

Q: In a case of undescended testis, after what age does further descent not occur?

4 months. **Explanation:** The descent of the testis occurs in two phases: the trans-abdominal phase (controlled by Insulin-like 3) and the trans-inguinal phase (androgen-dependent). While most testes are in the scrotum at birth, spontaneous descent can continue postnatally due to a transient surge in testosterone (the "mini-puberty" of infancy). 1. **Why 4 months is correct:** Clinical studies and urological guidelines (including AUA and EAU) indicate that spontaneous descent of an undescended testis (cryptorchidism) rarely occurs after the age of **3 to 4 months**. By this time, the postnatal testosterone surge subsides. Therefore, if the testis is not in the scrotum by 4 months, surgical intervention is indicated. 2. **Why other options are wrong:** * **6 months:** While older textbooks often cited 6 months as the cutoff, modern evidence shows descent stops earlier. However, 6 months is the age at which **surgical consultation** and planning for orchidopexy should ideally begin. * **8 & 12 months:** These are considered delayed. Waiting until 12 months increases the risk of germ cell loss and histological changes (such as Leydig cell atrophy and tubular fibrosis), which begin as early as 6–12 months of age. **Clinical Pearls for NEET-PG:** * **Ideal age for Orchidopexy:** Between **6 to 12 months** (to preserve fertility and allow for early screening of malignancy). * **Most common site:** Inguinal canal. * **Most common complication:** Inguinal hernia (due to patent processus vaginalis). * **Malignancy Risk:** Cryptorchidism increases the risk of testicular cancer (most commonly **Seminoma**). Orchidopexy does not eliminate the risk but makes the testis accessible for examination.

Q: Hydrocele is a type of ……………… cyst?

Exudation. ### Explanation **Correct Answer: C. Exudation** **Medical Concept:** A hydrocele is defined as an abnormal collection of serous fluid within the **tunica vaginalis** (the remnant of the processus vaginalis). It is classified as an **exudation cyst** because the fluid accumulates due to an imbalance between the secretion and absorption of fluid by the serous membrane. In primary hydroceles, this is often due to defective absorption by the lymphatics, while in secondary hydroceles, it is an inflammatory exudate resulting from underlying conditions like epididymo-orchitis or filariasis. **Analysis of Incorrect Options:** * **A. Retention Cyst:** These occur due to the obstruction of a gland's duct, causing secretions to accumulate (e.g., Sebaceous cyst, Ranula, or Spermatocele). * **B. Distension Cyst:** These occur when a pre-existing anatomical sac or space is distended with fluid (e.g., Gallbladder mucocele or a Baker’s cyst). While a hydrocele involves a sac, the pathological mechanism is specifically fluid exudation. * **D. Traumatic Cyst:** These are formed following hematoma resolution or tissue necrosis (e.g., Pseudocyst of the pancreas or a hematoma in the calf). While trauma can *cause* a secondary hydrocele (hematocele), the cyst type itself is defined by the fluid dynamics. **High-Yield Clinical Pearls for NEET-PG:** * **Transillumination:** The hallmark clinical sign of a hydrocele (it is brilliantly transilluminant). * **"Getting above the swelling":** You **can** get above the swelling in a hydrocele, which distinguishes it from an inguinal hernia. * **Lord’s Procedure:** Indicated for thin-walled hydroceles (involves plication of the sac). * **Jaboulay’s Procedure:** Indicated for large, thick-walled hydroceles (involves eversion of the sac). * **Secondary Hydrocele:** Always perform an ultrasound in young men to rule out an underlying **testicular tumor**.

Q: Which of the following is a radio opaque stone?

Struvite. **Explanation:** The visibility of urinary stones on a plain X-ray (KUB) depends on their calcium content and atomic density. **1. Why Struvite is the correct answer:** Struvite stones (Magnesium Ammonium Phosphate) are **radio-opaque**. They are also known as "triple phosphate" or "infection stones," typically forming in the presence of urea-splitting organisms like *Proteus*. While they are less dense than pure calcium oxalate stones, they contain enough mineral content to be clearly visible on conventional radiography. They often form large, branched **staghorn calculi**. **2. Why the other options are incorrect:** * **Uric acid stones:** These are classically **radiolucent**. They do not contain calcium and have a low atomic number, making them invisible on X-ray. They are, however, visible on Non-Contrast CT (NCCT) and Ultrasound. * **Triamterene stones:** These are rare medication-induced stones. Triamterene is a pteridine derivative that is inherently **radiolucent**. Other radiolucent stones include Xanthine, Indinavir (the only stone invisible even on NCCT), and Matrix stones. **3. High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic for Radio-opacity (Decreasing order):** **C**alcium Phosphate > **C**alcium Oxalate > **M**agnesium Ammonium Phosphate (Struvite) > **C**ystine (**C**-**C**-**M**-**C**). * **Cystine stones** are often described as "faintly radio-opaque" or having a "ground-glass" appearance due to their sulfur content. * **Pure Radiolucent Stones:** Uric acid, Xanthine, 2,8-Dihydroxyadenine, and Indinavir. * **Gold Standard Investigation:** Non-Contrast CT (NCCT) KUB is the investigation of choice for all urinary stones as it detects both opaque and lucent stones (except Indinavir).

Question 1

Squamous cell carcinoma of the bladder is predisposed by which of the following factors?

Accepted Answer

Persistent urachus

Answer

Urolithiasis

Answer

Schistosomiasis

Answer

Smoking

Question 2

What is the most probable cause for a 70-year-old man presenting with a testicular tumor?

Accepted Answer

Lymphoma

Answer

Seminoma

Answer

Teratoma

Answer

Choriocarcinoma

Question 3

Antibodies against sperms may develop after which of the following procedures?

Accepted Answer

Vasectomy

Answer

Trauma

Answer

Infection

Answer

Orchidectomy

Question 4

In renal transplant, where is the graft typically placed?

Accepted Answer

Iliac fossa

Answer

Upper retroperitoneal space

Answer

Normal anatomical site of the kidney

Answer

Anywhere

Question 5

In a case of undescended testis, after what age does further descent not occur?

Accepted Answer

4 months

Answer

6 months

Answer

8 months

Answer

12 months

Question 6

Hydrocele is a type of ……………… cyst?

Accepted Answer

Exudation

Answer

Retention

Answer

Distension

Answer

Traumatic

Question 7

Which of the following can complicate ureterosigmoidostomy?

Accepted Answer

Hyperchloremic acidosis

Answer

Carcinoma of the colon

Answer

Carcinoma of the bladder

Answer

Hypochloremic alkalosis

Question 8

A male patient presented to the emergency department with renal calculi. Extracorporeal shock wave lithotripsy was suggested after a detailed examination, but the procedure failed. Which of the following types of stones is MOST resistant to lithotripsy?

Accepted Answer

Cystine

Answer

Calcium oxalate

Answer

Triple phosphate

Answer

Uric acid

Question 9

Which of the following is a radio opaque stone?

Accepted Answer

Struvite

Answer

Uric acid stone

Answer

Triamterene

Answer

All of the above

Question 10

A 64-year-old male presents to the emergency department following a car accident with pulse 94 bpm, blood pressure 95/60 mm Hg, and HCT 30%. Severe hematuria is noted. After initial resuscitation, his blood pressure improves to 120/80 mm Hg. A CT scan shows extensive contusion of the left kidney and perirenal fat. His blood pressure subsequently declines to 80/40 mm Hg. What is the most appropriate surgical approach for an urgent laparotomy in this patient?

Accepted Answer

Midline abdominal incision

Answer

Left flank incision

Answer

Gibson incision

Answer

Thoracoabdominal incision

Urology — MCQs

Urology — MCQs

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