Urology Practice Questions

Q: Percutaneous nephrostomy is indicated in:

Pyonephrosis. **Explanation:** Percutaneous Nephrostomy (PCN) is a procedure where a catheter is inserted through the skin into the renal pelvis to provide external drainage of the collecting system. **Why Pyonephrosis is the Correct Answer:** Pyonephrosis is a surgical emergency characterized by the presence of infected, purulent material (pus) under pressure in an obstructed collecting system. If left undrained, it rapidly leads to urosepsis and irreversible renal damage. PCN is the **gold standard emergency treatment** for pyonephrosis as it provides immediate decompression and drainage of the infected focus, stabilizing the patient before definitive management of the underlying obstruction (e.g., stones). **Analysis of Incorrect Options:** * **Polycystic Kidney Disease (PKD):** PCN is not a standard treatment for PKD. Management focuses on blood pressure control and managing complications like cyst hemorrhage or infection. PCN is only used if a specific cyst becomes infected and is refractory to antibiotics, or if there is secondary obstruction. * **Solitary Adenocarcinoma:** Renal Cell Carcinoma (RCC) is managed surgically via partial or radical nephrectomy. PCN is generally avoided in malignant tumors due to the risk of **needle-track seeding**. * **Simple Hydronephrosis:** While PCN can drain hydronephrosis, it is not routinely indicated unless the condition is symptomatic, bilateral (causing azotemia), or associated with infection. Most simple hydronephrosis cases are managed by treating the primary cause (e.g., DJ stenting for stones). **Clinical Pearls for NEET-PG:** * **Most common indication for PCN:** Supravesical obstruction (e.g., ureteric calculi, pelvic malignancies). * **Absolute Contraindication:** Uncorrected coagulopathy. * **Imaging Guidance:** PCN is most commonly performed under **Ultrasonography (USG)** or Fluoroscopy guidance. * **Triad of Pyonephrosis:** Fever, loin pain, and a palpable tender mass.

Q: A 40-year-old patient with a pelvic injury presents with a 1.5 cm length stricture of the bulbar urethra. What would be the management?

Excision and end-to-end urethroplasty. The management of urethral strictures depends primarily on the **location, length, and etiology** of the stricture. ### **Why Option B is Correct** For **bulbar urethral strictures** that are short (**< 2 cm**), the gold standard treatment is **Excision and Primary End-to-End Urethroplasty (EPA)**. * **The Concept:** The bulbar urethra is mobile and surrounded by the bulbospongiosus muscle, allowing for the mobilization and tension-free anastomosis of the two healthy ends after the fibrotic segment is excised. * **Success Rate:** This procedure has the highest long-term success rate (over 90-95%) for short, traumatic bulbar strictures. ### **Why Other Options are Incorrect** * **A & D (Urethral Dilatation & Urethrotomy):** While Direct Vision Internal Urethrotomy (DVIU) or dilatation can be used for very short ( 2 cm)** where an end-to-end anastomosis would cause chordee or excessive tension. ### **Clinical Pearls for NEET-PG** * **Gold Standard for Bulbar Stricture ( 2 cm):** Substitution urethroplasty (Buccal Mucosa Graft is the preferred material). * **Most common site of traumatic urethral stricture:** Bulbar urethra (due to straddle injury). * **Most common site of post-gonococcal stricture:** Bulbar urethra. * **Initial investigation of choice:** Retrograde Urethrogram (RUG) to define the site and length.

Q: In Winter's classification of impacted teeth, what does the "red line" represent?

The depth at which the impacted tooth is located.. In the assessment of impacted mandibular third molars, **George Winter’s classification** (specifically the WAR lines) is a fundamental radiographic tool used to predict surgical difficulty. ### **Explanation of the Correct Answer** The **Red Line** represents the **depth of the impacted tooth** within the mandible. It is a vertical line dropped perpendicularly from the "Amber Line" (which represents the alveolar bone crest) to the specific point of application for an elevator on the impacted tooth. * **Clinical Significance:** The longer the red line (measured in millimeters), the deeper the tooth is embedded, indicating a more difficult surgical extraction and the need for more extensive bone removal. ### **Analysis of Incorrect Options** * **Option B:** The angulation of the tooth is determined by the **long axis** of the third molar relative to the second molar (e.g., mesioangular, distoangular), not the red line. * **Option C:** This describes the **Amber Line**, which is drawn from the alveolar crest of the second molar to the external oblique ridge. * **Option D:** This refers to the **Pell and Gregory Classification** (Class I, II, III), which assesses the relationship between the third molar and the anterior border of the ramus. ### **High-Yield NEET-PG Pearls** * **White Line:** Represents the occlusal plane of the erupted mandibular molars. * **Amber Line:** Represents the height of the alveolar bone (bone level). * **Red Line:** Represents the depth of impaction (difficulty level). * **Rule of Thumb:** A red line length of **5mm or more** usually indicates a complex extraction requiring significant guttering of bone.

Q: What is the treatment of choice for TURP syndrome?

Furosemide. **Explanation:** **TURP Syndrome** is a clinical complication caused by the excessive systemic absorption of non-conductive irrigation fluid (traditionally 1.5% Glycine) through opened prostatic venous sinuses. This leads to **dilutional hyponatremia** and **hypervolemic fluid overload**. **Why Furosemide is the Correct Answer:** The primary goal in managing TURP syndrome is to address the fluid overload and promote the excretion of excess free water. **Furosemide (a loop diuretic)** is the treatment of choice because it rapidly induces diuresis, reducing the intravascular volume and helping to correct the dilutional state. In mild to moderate cases, fluid restriction and Furosemide are often sufficient to allow the body to naturally re-equilibrate sodium levels. **Analysis of Incorrect Options:** * **Normal Saline (0.9% NaCl):** While it contains sodium, it adds to the volume overload, potentially worsening pulmonary edema or congestive heart failure. * **1.5% NaCl:** This is a hypotonic solution relative to the body's needs in this scenario. If sodium replacement is required for severe symptoms (e.g., seizures), **Hypertonic Saline (3% NaCl)** is used, not 1.5%. * **Thiazides:** These are less potent than loop diuretics and can further lower serum sodium levels by inhibiting sodium reabsorption in the distal tubule, making them inappropriate for treating hyponatremia. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Hypertension (early), Bradycardia, and Mental status changes (due to cerebral edema). * **Severe Cases:** If sodium levels are <120 mEq/L or the patient has seizures, use **3% Hypertonic Saline** at a slow rate (not exceeding 10–12 mEq/L in 24 hours) to avoid **Central Pontine Myelinolysis**. * **Prevention:** Modern practice uses **Bipolar TURP** with Normal Saline irrigation, which significantly reduces the risk of this syndrome.

Q: Which germ cell tumor is not seen in males?

Sertoli cell tumor. **Explanation:** The classification of testicular tumors is divided into **Germ Cell Tumors (GCTs)** and **Sex Cord-Stromal Tumors**. 1. **Why Sertoli Cell Tumor is the correct answer:** The question asks which *germ cell tumor* is not seen in males. **Sertoli cell tumors** are derived from the sex cord-stromal cells (the supportive cells of the testis), not from the primordial germ cells. Therefore, while they occur in males, they are classified as **Sex Cord-Stromal Tumors**, making them the outlier in a list of Germ Cell Tumors. 2. **Analysis of Incorrect Options (Germ Cell Tumors):** * **Seminoma (Option B):** The most common pure germ cell tumor in adults (ages 30–40). It is highly radiosensitive and carries a good prognosis. * **Teratoma (Option D):** A germ cell tumor composed of all three germ layers (ectoderm, mesoderm, endoderm). In prepubertal males, they are usually benign; in post-pubertal males, they are considered malignant. * **Choriocarcinoma (Option A):** A highly aggressive non-seminomatous germ cell tumor (NSGCT) characterized by early hematogenous spread and high levels of β-hCG. **High-Yield Clinical Pearls for NEET-PG:** * **Most common testicular tumor:** Seminoma. * **Most common testicular tumor in infants/children:** Yolk Sac Tumor (Endodermal Sinus Tumor); associated with elevated **Alpha-Fetoprotein (AFP)**. * **Reinke Crystals:** Pathognomonic histological finding in **Leydig Cell Tumors** (another type of Sex Cord-Stromal tumor). * **Schiller-Duval Bodies:** Characteristic histological finding in Yolk Sac Tumors. * **AFP is NEVER elevated in pure Seminomas.** If AFP is high, a non-seminomatous component is present.

Q: Which of the following statements about posterior urethral valves in a neonate is true?

Bilateral hydronephrosis may be present.. **Explanation:** **Posterior Urethral Valves (PUV)** are the most common cause of bladder outlet obstruction in male infants. They consist of abnormal mucosal folds in the distal prostatic urethra that act as a one-way valve, impeding urinary flow. 1. **Why Option A is Correct:** The obstruction at the level of the urethra causes high intravesical pressure, which is transmitted retrogradely to the ureters and kidneys. This leads to **bilateral hydroureteronephrosis** and bladder wall hypertrophy. In severe cases, this pressure causes renal dysplasia and can lead to Potter sequence (due to oligohydramnios). 2. **Why Option B is Incorrect:** Because PUV causes significant bilateral renal obstruction and potential parenchymal damage, **creatinine and urea levels are typically elevated** (azotemia) in the neonatal period. Monitoring the "nadir creatinine" after drainage is a key prognostic indicator. 3. **Why Option C is Incorrect:** While the valves do cause **dilation (ballooning) of the prostatic urethra** proximal to the obstruction, they do not "enlarge" the urethra in a physiological sense; rather, they are the obstructing membranes themselves. 4. **Why Option D is Incorrect:** PUV occurs **exclusively in males**. In females, the embryological equivalent is rare and presents differently. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** Poor urinary stream (dribbling), palpable bladder, and bilateral renal masses. * **Gold Standard Investigation:** **Voiding Cystourethrogram (VCUG)** showing a dilated prostatic urethra ("spinning top" appearance) and the valve itself. * **Initial Management:** Catheterization (using a small feeding tube) to decompress the system, followed by **Endoscopic Fulguration** of the valves. * **Key Sign on Ultrasound:** The **"Keyhole Sign"** (dilated bladder and dilated posterior urethra).

Q: Which of the following is NOT an intravesical chemotherapeutic agent?

Adriamycin. The correct answer is **A. Adriamycin**. ### **Explanation** The question asks to identify which agent is **NOT** typically used for intravesical chemotherapy in the management of Non-Muscle Invasive Bladder Cancer (NMIBC). While **Adriamycin (Doxorubicin)** is a potent systemic chemotherapeutic agent used in various malignancies, it is rarely used intravesically today due to its high molecular weight (leading to poor absorption into the bladder wall) and significant local toxicity (chemical cystitis). In the context of standard NEET-PG curriculum and clinical guidelines (like EAU/AUA), the primary intravesical agents are Mitomycin C, BCG, and Thiotepa. ### **Analysis of Options** * **B. Mitomycin C:** This is the most common **antitumor antibiotic** used for immediate post-operative instillation (within 6 hours) to prevent "seeding" of tumor cells. It inhibits DNA synthesis. * **C. BCG (Bacillus Calmette-Guérin):** This is the "gold standard" **immunotherapy** (not technically a chemical drug, but categorized under intravesical therapy) for high-risk NMIBC and Carcinoma in situ (CIS). It works by inducing a local T-cell mediated immune response. * **D. Thiotepa:** An **alkylating agent** that was historically the first drug used for intravesical therapy. Though less common now due to its risk of systemic absorption and bone marrow suppression (myelosuppression), it remains a recognized intravesical agent. ### **High-Yield Clinical Pearls for NEET-PG** * **Immediate Post-op Instillation:** Mitomycin C is the drug of choice to reduce recurrence rates. * **BCG Contraindications:** Do not give BCG if there is gross hematuria, traumatic catheterization, or if the patient is immunocompromised (risk of BCG-osis/Sepsis). * **Valrubicin:** Currently the only FDA-approved intravesical chemotherapy specifically for BCG-refractory CIS. * **Gemcitabine:** Increasingly used as a modern intravesical alternative with lower toxicity than Mitomycin C.

Question 1

A 55-year-old male patient underwent cholecystectomy for gallstone calculus. During surgery, the patient's pulse was irregularly irregular, 160/min, BP = 80/50 mm Hg, temp = 40°C. On examination, a swelling in the neck was found. What is the most likely diagnosis?

Accepted Answer

Thyroid storm

Answer

Myocardial infarction

Answer

Arrhythmia

Answer

Stridor

Question 2

In which of the following conditions is neo-adjuvant chemotherapy NOT used?

Accepted Answer

Breast cancer stage 2

Answer

Osteosarcoma

Answer

Chest wall PNET

Answer

Ovarian cancer stage 3

Question 3

Percutaneous nephrostomy is indicated in:

Accepted Answer

Pyonephrosis

Answer

Polycystic kidney disease

Answer

Solitary adenocarcinoma

Answer

Simple hydronephrosis

Question 4

Which of the following statements about renal cell carcinoma is false?

Accepted Answer

It is radiosensitive.

Answer

It is also known as Grawitz tumor.

Answer

Tumors less than 4 cm are typically treated with partial nephrectomy.

Answer

It arises from the proximal convoluted tubule.

Question 5

A 40-year-old patient with a pelvic injury presents with a 1.5 cm length stricture of the bulbar urethra. What would be the management?

Accepted Answer

Excision and end-to-end urethroplasty

Answer

Urethral dilatation

Answer

Patch graft urethroplasty

Answer

Urethrotomy

Question 6

In Winter's classification of impacted teeth, what does the "red line" represent?

Accepted Answer

The depth at which the impacted tooth is located.

Answer

The angulation of the second molar.

Answer

The summit of the alveolar bone covering the impacted tooth.

Answer

The relationship of the third molar to the ramus.

Question 7

What is the treatment of choice for TURP syndrome?

Accepted Answer

Furosemide

Answer

Normal saline

Answer

1.5% NaCl

Answer

Thiazides

Question 8

Which germ cell tumor is not seen in males?

Accepted Answer

Sertoli cell tumor

Answer

Choriocarcinoma

Answer

Seminoma

Answer

Teratoma

Question 9

Which of the following statements about posterior urethral valves in a neonate is true?

Accepted Answer

Bilateral hydronephrosis may be present.

Answer

Creatinine and urea levels remain normal.

Answer

They enlarge and widen the prostatic urethra.

Answer

They are more common in girls.

Question 10

Which of the following is NOT an intravesical chemotherapeutic agent?

Accepted Answer

Adriamycin

Answer

Mitomycin C

Answer

BCG

Answer

Thiotepa

Urology — MCQs

Urology — MCQs

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