Urology Practice Questions

Q: What is the color of a 16 French Foley catheter?

Orange. The color coding of Foley catheters is standardized internationally according to the **French (Fr) scale**, which measures the outer diameter of the catheter (1 Fr = 1/3 mm). This standardization allows for rapid identification during emergency procedures and routine bedside care. ### **Explanation of Options:** * **A. Orange (Correct):** A **16 French** catheter is color-coded orange. This is one of the most commonly used sizes for adult males and females, providing a balance between efficient drainage and patient comfort. * **B. Yellow:** This color corresponds to a **20 French** catheter. These are typically used when there is a need for faster drainage or when clots/debris are present in the urine. * **C. Blue:** This color corresponds to an **8 French** catheter. These are primarily used in the pediatric population. * **D. Black:** This color corresponds to a **10 French** catheter, also commonly used in pediatric or adolescent patients. ### **High-Yield Clinical Pearls for NEET-PG:** * **Size Calculation:** To find the diameter in millimeters, divide the French size by 3 (e.g., 18 Fr = 6 mm). * **Common Color Codes to Memorize:** * **12 Fr:** White * **14 Fr:** Green * **16 Fr:** Orange * **18 Fr:** Red * **22 Fr:** Violet/Purple * **Clinical Indication:** In cases of **acute urinary retention** due to BPH, a 16 or 18 Fr Coudé tip (curved) catheter is often preferred to bypass the prostatic bulk. * **Toxicology Link:** In the management of severe overdoses requiring **forced diuresis** or strict intake-output monitoring, a 16 Fr Foley is the standard choice for adult patients.

Q: Which of the following surgeries is indicated for the removal of a 3cm ameloblastoma involving the inferior border of the mandible?

Resection. **Explanation:** **Ameloblastoma** is a benign but locally aggressive odontogenic tumor with a high rate of recurrence. The management of this tumor is a high-yield topic for NEET-PG, focusing on the distinction between conservative and radical treatments. **Why Resection is Correct:** For a large (3cm) lesion involving the **inferior border of the mandible**, radical surgery in the form of **Segmental or Marginal Resection** is the treatment of choice. Because ameloblastoma tends to infiltrate the surrounding trabecular bone beyond its apparent radiological margins, a "safety margin" of 1–1.5 cm of healthy bone is required. Since the inferior border is involved, a segmental resection is often necessary to ensure complete removal and prevent recurrence, which can be as high as 50–90% with conservative methods. **Why Other Options are Incorrect:** * **Enucleation:** This involves "shelling out" the tumor. It is only considered for very small, unicystic variants. For a 3cm multicystic lesion, it carries an unacceptably high recurrence rate. * **Fulguration & Cryosurgery:** These are adjunctive treatments sometimes used after enucleation to kill residual cells. However, they are not primary treatments for a 3cm lesion involving the mandibular border, as they cannot guarantee the removal of deep infiltrative components. **Clinical Pearls for NEET-PG:** * **Most common site:** Posterior mandible (molar-ramus area). * **Radiological appearance:** "Soap bubble" or "Honeycombed" multilocular appearance. * **Histopathology:** "Vickers-Gorlin" criteria (palisading basal cells with reverse polarity). * **Gold Standard:** Wide local excision/Resection with 1–1.5 cm margins.

Q: Pain in the region of the penis in acute urethritis is typically experienced?

During micturition. ### Explanation The correct answer is **C. During micturition**. **Medical Concept:** Urethritis is the inflammation of the urethral mucosa, most commonly due to sexually transmitted infections (e.g., *Neisseria gonorrhoeae* or *Chlamydia trachomatis*). The pain associated with urethritis is a classic example of **"scalding" dysuria**. As acidic urine passes through the inflamed, sensitive, and often denuded urethral lining during the act of voiding, it causes immediate irritation and a burning sensation. Therefore, the pain is maximal **during micturition**. **Analysis of Incorrect Options:** * **A. Before micturition:** Pain before voiding is typically associated with **bladder distension** (e.g., acute cystitis or interstitial cystitis). The pain is relieved once the bladder is emptied and the tension on the bladder wall is reduced. * **B. After micturition:** Pain at the end of or after micturition (terminal dysuria) is characteristic of **trigonitis** or **posterior urethritis/prostatitis**. As the bladder collapses at the end of voiding, the inflamed mucosal surfaces of the trigone rub against each other, causing pain. * **D. Irrespective of micturition:** Constant pain in the penile region, unrelated to voiding, is more suggestive of conditions like **priapism, paraphimosis, or local trauma/abscess**, rather than simple urethritis. **High-Yield Clinical Pearls for NEET-PG:** * **Urethral Discharge:** Gonococcal urethritis typically presents with a profuse, creamy yellow discharge, whereas Non-gonococcal urethritis (NGU) presents with a scant, mucoid discharge. * **Two-Glass Test:** Used to localize the site of infection. If the first glass is turbid and the second is clear, it indicates **anterior urethritis**. If both are turbid, it suggests a more proximal infection (cystitis or prostatitis). * **Initial Dysuria:** Pain at the start of micturition usually points to an anterior urethral lesion.

Q: What is the most common type of cancer affecting the renal pelvis and upper ureter?

Transitional cell carcinoma. ### Explanation **Correct Option: A. Transitional Cell Carcinoma (TCC)** The entire urinary tract, from the renal calyces and pelvis down to the proximal urethra, is lined by **urothelium** (formerly known as transitional epithelium). Therefore, the most common malignancy arising from these structures is **Transitional Cell Carcinoma (TCC)**, now more commonly referred to as **Urothelial Carcinoma**. It accounts for over 90% of tumors in the renal pelvis and ureter. **Incorrect Options:** * **B. Adenocarcinoma:** This is a rare primary tumor of the renal pelvis, usually associated with chronic irritation or glandular metaplasia (cystitis glandularis). * **C. Squamous Cell Carcinoma (SCC):** While it can occur in the renal pelvis, it is much less common than TCC. It is strongly associated with **chronic irritation**, such as long-standing staghorn calculi or chronic infections. * **D. Nephroblastoma (Wilms Tumor):** This is a primary **embryonal renal parenchymal tumor** seen in children. It does not arise from the urothelial lining of the collecting system. **Clinical Pearls for NEET-PG:** 1. **Field Change Effect:** Urothelial tumors exhibit "polychronotopicity." A patient with renal pelvis TCC has a 30–50% chance of developing a synchronous or metachronous bladder tumor. 2. **Risk Factors:** Smoking (most common), Balkan endemic nephropathy, and exposure to aromatic amines (dyes). 3. **Gold Standard Investigation:** CT Urography (shows a "filling defect"). 4. **Treatment of Choice:** Radical nephroureterectomy with excision of a bladder cuff (to prevent recurrence in the distal ureteric stump).

Q: Which of the following closely mimics testicular malignancy?

Haematocele. **Explanation** The correct answer is **Haematocele**. **Why Haematocele mimics Testicular Malignancy:** A chronic haematocele is the most common condition to be mistaken for a testicular tumor. Both conditions typically present as a **painless, firm-to-hard, heavy scrotal swelling** that does **not transilluminate**. In chronic cases, the blood within the tunica vaginalis undergoes organization, leading to thickening and fibrosis of the sac. This creates a solid, irregular mass-like consistency on palpation, making it clinically indistinguishable from a malignancy without imaging (Ultrasound) or surgical exploration. **Why other options are incorrect:** * **Hydrocele:** While it causes scrotal enlargement, it is typically soft, fluctuant, and **transilluminates** brilliantly. Malignancy is solid and opaque. * **Spermatocele:** This is a retention cyst of the efferent ductules. It is felt as a distinct, globular swelling **separate from and above the testis** (like a "third testis"), whereas malignancy involves the body of the testis itself. * **Cyst of Epididymis:** Similar to a spermatocele, these are fluid-filled structures located in the epididymis and are easily distinguishable from the testicular parenchyma on palpation. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Any solid, non-transilluminating testicular mass is considered **malignant until proven otherwise**. * **Diagnostic Gold Standard:** Scrotal Ultrasound (USG) is the first-line investigation to differentiate intra-testicular from extra-testicular masses. * **Surgical Approach:** If malignancy is suspected, the surgical approach is always **Radical Inguinal Orchidectomy**. A trans-scrotal biopsy is strictly contraindicated as it risks lymphatic seeding to the inguinal nodes.

Q: Which is the most common cause of urinary retention in an elderly man?

Benign prostatic hyperplasia. **Explanation:** **Benign Prostatic Hyperplasia (BPH)** is the most common cause of bladder outlet obstruction and subsequent urinary retention in elderly men. As a man ages, the periurethral (transition) zone of the prostate undergoes glandular and stromal proliferation under the influence of Dihydrotestosterone (DHT). This enlargement compresses the prostatic urethra, increasing resistance to urine flow and leading to Lower Urinary Tract Symptoms (LUTS) or acute/chronic retention. **Analysis of Options:** * **Benign Prostatic Hyperplasia (Correct):** Histological evidence of BPH is present in approximately 50% of men by age 60 and 90% by age 85, making it the statistically dominant cause. * **Carcinoma of the Prostate:** While common in elderly men, it typically arises in the **peripheral zone**. It usually remains asymptomatic until advanced stages and is a much less frequent cause of acute retention compared to BPH. * **Bladder Neck Hypertrophy:** This is often a secondary change (compensatory) due to chronic obstruction or seen in specific conditions like Marion’s disease (primary bladder neck obstruction), but it is not the primary cause in the general elderly population. * **Constriction (Stricture):** Urethral strictures are usually the result of trauma, instrumentation, or infection (gonococcal). While they cause retention, they are less common than BPH in the elderly. **Clinical Pearls for NEET-PG:** * **Zone involved:** BPH affects the **Transition Zone**; Prostate Cancer affects the **Peripheral Zone**. * **First-line Medical Management:** Alpha-blockers (e.g., Tamsulosin) to reduce dynamic obstruction. * **Gold Standard Surgery:** TURP (Transurethral Resection of the Prostate). * **Most common site of metastasis in Prostate Cancer:** Lumbar spine (via Batson’s plexus).

Q: A 60-year-old male undergoes TURP. After 3 days, the patient develops altered sensorium and drowsiness. What is the most probable diagnosis?

Hyponatremia. ### Explanation **Correct Answer: B. Hyponatremia** The clinical scenario describes **TURP Syndrome**, a classic complication of Transurethral Resection of the Prostate. During the procedure, large volumes of non-conductive irrigation fluids (traditionally **1.5% Glycine**) are used. These fluids can be absorbed into the systemic circulation through opened prostatic venous sinuses [1]. The absorption of this hypotonic, sodium-free fluid leads to **dilutional hyponatremia** and fluid overload [1]. The rapid drop in serum sodium levels causes cerebral edema, manifesting as altered sensorium, drowsiness, confusion, seizures, and potentially coma [1]. **Analysis of Incorrect Options:** * **A. Hypernatremia:** TURP syndrome causes a "dilutional" effect, lowering sodium concentration. Hypernatremia would involve water loss or sodium gain, which is the opposite of the pathophysiology here. * **C. Stroke:** While a stroke can cause altered sensorium in elderly patients, the specific temporal relationship with a TURP procedure strongly points toward a metabolic/electrolyte cause rather than a focal neurological event. * **D. Meningitis:** While spinal anesthesia is used for TURP, meningitis typically presents with fever, nuchal rigidity, and headache. It would not explain the systemic fluid shifts associated with this surgery. **NEET-PG High-Yield Pearls:** * **Irrigating Fluid:** 1.5% Glycine is most common. Others include Mannitol or Sorbitol. * **Triad of TURP Syndrome:** Hypertension (early), Bradycardia, and Altered Mental Status. * **Visual Disturbances:** Glycine is an inhibitory neurotransmitter in the retina; its toxicity can cause transient blindness. * **Prevention:** Limit resection time to <60 minutes and keep the irrigation bag height <60 cm above the patient. * **Treatment:** Fluid restriction and Diuretics (mild cases); **3% Hypertonic saline** (severe symptomatic hyponatremia).

Q: Jack stone calculi are made up of which of the following?

Calcium oxalate. **Explanation:** **Jack stone calculi** are a specific morphological subtype of urinary stones, almost exclusively composed of **Calcium oxalate monohydrate**. The correct answer is **Calcium oxalate (Option D)**. These stones derive their name from their resemblance to the metal pieces used in the children's game "Jacks." They are characterized by a dense central core with multiple radiating spicules or "arms." Clinically, they are most commonly found in the **urinary bladder** and are typically associated with chronic bladder outlet obstruction or stasis. Their unique shape is thought to result from the jagged edges repeatedly hitting the bladder wall, breaking off fragile attachments while allowing the dense crystalline arms to grow. **Analysis of Incorrect Options:** * **A. Ammonium urate:** These are associated with malnutrition and chronic diarrhea; they typically form "hedgehog" stones but are not Jack stones. * **B. Uric acid:** These stones are radiolucent and usually smooth or faceted, forming in acidic urine. * **C. Struvite:** Also known as "Triple Phosphate" or "Infection stones," these are associated with Proteus infections and typically form large **Staghorn calculi** that fill the renal pelvis. **High-Yield Clinical Pearls for NEET-PG:** * **Composition:** Jack stones = Calcium oxalate monohydrate (Whewellite). * **Radiology:** They are **radio-opaque** due to their calcium content. * **Common Site:** Urinary bladder (rarely found in the upper urinary tract). * **Microscopy:** Calcium oxalate monohydrate crystals appear as **dumbbell-shaped**, whereas dihydrate crystals (Weddellite) appear as **envelope-shaped**.

Q: What is the investigation of choice for a ureteric stone?

CT scan. The investigation of choice for a ureteric stone is a **Non-Contrast Computed Tomography (NCCT) of the Kidney, Ureter, and Bladder (KUB)**. ### Why CT Scan is the Correct Answer NCCT KUB is the gold standard because it has the highest sensitivity (95-97%) and specificity (96-98%) for detecting urolithiasis. * **Detection:** It can identify almost all types of stones (including uric acid and xanthine stones, which are radiolucent on X-ray), except for rare indinavir stones. * **Secondary Signs:** It helps identify complications like hydroureteronephrosis, perinephric stranding, and the "rim sign" (edema around the stone). * **Planning:** It provides precise stone size, location, and **Hounsfield Units (HU)**, which helps predict stone hardness and the success of ESWL. ### Why Other Options are Incorrect * **USG (Ultrasonography):** While safe and radiation-free, it is operator-dependent and often misses small ureteric stones, especially in the mid-ureter, due to overlying bowel gas. It is the investigation of choice only in **pregnant women** and **children**. * **MIBG Scan:** This is a nuclear medicine study used to localize neuroendocrine tumors, specifically **pheochromocytoma** and neuroblastoma. It has no role in stone disease. * **DMSA Scan:** This is a static renal scan used to assess **functional renal cortical mass** and detect renal scarring (common in pediatric reflux or pyelonephritis). It does not visualize stones. ### High-Yield Clinical Pearls for NEET-PG * **Gold Standard:** NCCT KUB. * **Initial Investigation (Emergency):** USG + X-ray KUB (often used in clinical practice, though NCCT is the definitive choice). * **Investigation of choice in Pregnancy:** USG (1st line); MRI (2nd line, though stones are hard to see); Low-dose CT (last resort in 2nd/3rd trimester). * **Hardness Correlation:** Stones >1000 HU are generally resistant to ESWL.

Question 1

What causes ureteric colic due to a stone?

Accepted Answer

Increased peristalsis of the ureter to overcome the obstruction

Answer

Stretching of the renal capsule due to back pressure

Answer

Irritation of the intramural ureter

Answer

Extravasation of urine

Question 2

What is the color of a 16 French Foley catheter?

Accepted Answer

Orange

Answer

Yellow

Answer

Blue

Answer

Black

Question 3

Which of the following surgeries is indicated for the removal of a 3cm ameloblastoma involving the inferior border of the mandible?

Accepted Answer

Resection

Answer

Enucleation

Answer

Fulgration

Answer

Cryosurgery

Question 4

Pain in the region of the penis in acute urethritis is typically experienced?

Accepted Answer

During micturition

Answer

Before micturition

Answer

After micturition

Answer

Irrespective of micturition

Question 5

What is the most common type of cancer affecting the renal pelvis and upper ureter?

Accepted Answer

Transitional cell carcinoma

Answer

Adenocarcinoma

Answer

Squamous cell carcinoma

Answer

Nephroblastoma

Question 6

Which of the following closely mimics testicular malignancy?

Accepted Answer

Haematocele

Answer

Hydrocele

Answer

Spermatocele

Answer

Cyst of epididymis

Question 7

Which is the most common cause of urinary retention in an elderly man?

Accepted Answer

Benign prostatic hyperplasia

Answer

Constriction

Answer

Bladder neck hypertrophy

Answer

Carcinoma of the prostate

Question 8

A 60-year-old male undergoes TURP. After 3 days, the patient develops altered sensorium and drowsiness. What is the most probable diagnosis?

Accepted Answer

Hyponatremia

Answer

Hypernatremia

Answer

Stroke

Answer

Meningitis due to spinal anesthesia

Question 9

Jack stone calculi are made up of which of the following?

Accepted Answer

Calcium oxalate

Answer

Ammonium urate

Answer

Uric acid

Answer

Struvite

Question 10

What is the investigation of choice for a ureteric stone?

Accepted Answer

CT scan

Answer

USG

Answer

MIBG scan

Answer

DMSA scan

Urology — MCQs

Urology — MCQs

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