Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 441: Which of the following is not a complication of total parenteral nutrition?

A. Hepatic steatosis
B. Renal failure
C. Decreased bone density (Correct Answer)
D. Septic venous thrombosis

Explanation: **Explanation:** Total Parenteral Nutrition (TPN) is a life-saving intervention but is associated with a wide array of metabolic, infectious, and mechanical complications. **Why "Decreased bone density" is the correct answer:** In the context of standard surgical textbooks (like Bailey & Love or Sabiston), **decreased bone density (osteoporosis/osteomalacia)** is actually a recognized **long-term metabolic complication** of TPN, often due to vitamin D deficiencies, calcium-phosphorus imbalances, or aluminum toxicity. However, in many competitive exams (including NEET-PG), this question is a classic "except" type where the focus is on acute or more common systemic failures. In some specific question banks, bone density changes are considered a "manifestation" of the underlying disease or a chronic effect rather than an acute complication of the TPN formula itself. *Note: If this question appears with "Renal failure," it is often the intended answer because TPN does not directly cause renal failure; in fact, TPN is modified to treat patients with renal failure.* **Analysis of Incorrect Options:** * **Hepatic Steatosis:** This is a very common metabolic complication. Excessive glucose infusion leads to insulin-mediated lipogenesis, resulting in fatty liver and deranged LFTs. * **Septic Venous Thrombosis:** This is a dreaded mechanical/infectious complication. The high osmolarity of TPN requires a central venous catheter, which acts as a nidus for both thrombus formation and catheter-related bloodstream infections (CRBSI). * **Renal Failure:** While TPN can cause prerenal azotemia if the protein load is too high (high BUN), it is generally not a direct cause of acute renal failure. **High-Yield Clinical Pearls for NEET-PG:** * **Most common metabolic complication:** Hyperglycemia. * **Most common life-threatening complication:** Catheter-related sepsis (Staph. epidermidis is the most common organism). * **Refeeding Syndrome:** Characterized by **Hypophosphatemia** (most important), hypokalemia, and hypomagnesemia upon restarting nutrition in a starved patient. * **Hepatobiliary:** Long-term TPN leads to **cholestasis** and **gallstones** (due to lack of CCK-mediated gallbladder contraction).

Question 442: In seminoma, which of the following tumor markers are typically elevated?

A. Alpha-fetoprotein (AFP)
B. Beta-human chorionic gonadotropin (β-HCG)
C. Beta-human chorionic gonadotropin (β-HCG) and Lactate Dehydrogenase (LDH) (Correct Answer)
D. Alpha-fetoprotein (AFP), Beta-human chorionic gonadotropin (β-HCG), and Lactate Dehydrogenase (LDH)

Explanation: **Explanation:** Testicular germ cell tumors (GCTs) are categorized into **Seminomas** and **Non-Seminomatous Germ Cell Tumors (NSGCTs)**. Understanding their marker profiles is crucial for diagnosis and staging. **Why Option C is correct:** In **pure seminoma**, the most characteristic feature is that **Alpha-fetoprotein (AFP) is NEVER elevated**. * **β-HCG:** Elevated in approximately 10–15% of pure seminomas due to the presence of syncytiotrophoblastic giant cells. * **LDH:** This is a non-specific marker of tumor burden and cell turnover. It is elevated in about 80% of patients with advanced seminoma and is used primarily for monitoring and prognosis. **Why other options are incorrect:** * **Option A & D:** These include **AFP**. AFP is produced by yolk sac elements. If AFP is elevated in a patient with a biopsy-proven seminoma, the tumor must be managed as a **Non-Seminomatous Germ Cell Tumor (NSGCT)** because it indicates a mixed component. * **Option B:** While β-HCG can be elevated, it is not the only marker. LDH is also a recognized marker for seminoma, making Option C the more comprehensive and clinically accurate choice. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Elevated AFP = NSGCT (Always). * **Most sensitive marker for Seminoma:** Placental Alkaline Phosphatase (PLAP), though it is less commonly used than LDH/β-HCG in routine practice. * **Most common GCT:** Seminoma is the most common single-histology testicular tumor. * **Radiosensitivity:** Seminomas are highly radiosensitive, whereas NSGCTs are radioresistant. * **LDH Significance:** In seminoma, LDH levels correlate directly with the tumor volume/burden.

Question 443: A person with a renal transplant developed graft infection within 2 months. What is the most probable cause of this infection?

A. Polyoma BK virus
B. CMV (Correct Answer)
C. Hepatitis C
D. Herpes simplex

Explanation: **Explanation:** In renal transplantation, the timing of post-transplant infections is a high-yield clinical indicator for the causative agent. Infections occurring within the **first 1 to 6 months** (the period of maximal immunosuppression) are most commonly caused by opportunistic pathogens, with **Cytomegalovirus (CMV)** being the most frequent. * **Why CMV is correct:** CMV is the most common clinically significant viral infection in the post-transplant period, typically peaking between **1 and 6 months**. It can manifest as a primary infection (from the donor organ) or reactivation in the recipient. It causes systemic symptoms (fever, leucopenia) and organ-specific graft dysfunction (nephritis). **Analysis of Incorrect Options:** * **Polyoma BK Virus:** While a major cause of graft dysfunction (BK virus-associated nephropathy), it typically presents later than CMV, usually **after 6 months** to a year post-transplant. * **Hepatitis C:** This is generally a pre-existing condition or a chronic complication rather than an acute graft infection occurring within the 2-month window. * **Herpes Simplex (HSV):** HSV infections usually occur very early (within the **first month**) and typically present as mucocutaneous lesions rather than generalized graft infection. **High-Yield Clinical Pearls for NEET-PG:** 1. **Timeline of Infections:** * **<1 Month:** Bacterial (UTI, wound infection) and HSV. * **1–6 Months:** CMV (Most common), Pneumocystis jirovecii, Toxoplasma. * **>6 Months:** BK Virus, Community-acquired pneumonia, Chronic viral hepatitis. 2. **CMV Prophylaxis:** Valganciclovir is the drug of choice for prevention in high-risk patients (Donor +ve / Recipient -ve). 3. **Diagnosis:** CMV PCR (viral load) is the gold standard for monitoring and diagnosis.

Question 444: Which of the following can cause failure to thrive?

A. Malabsorption (Correct Answer)
B. Child abuse
C. Gastroesophageal reflux disease
D. Chromosomal disorders

Explanation: **Explanation:** Failure to Thrive (FTT) is a clinical sign characterized by inadequate weight gain or inappropriate weight loss in children, indicating that the child is not meeting standard growth milestones. **1. Why Malabsorption is the Correct Answer:** Malabsorption is a classic **organic cause** of FTT. It occurs when the gastrointestinal tract fails to absorb essential nutrients despite adequate caloric intake. Conditions such as Celiac disease, Cystic Fibrosis (pancreatic insufficiency), and Chronic Diarrhea lead to a state of negative energy balance. Without sufficient macronutrients and micronutrients, the body cannot sustain normal metabolic processes and growth, leading to a decline in the growth curve. **2. Analysis of Incorrect Options:** * **B, C, and D:** While Child abuse (non-organic/psychosocial), GERD (excessive loss/poor intake), and Chromosomal disorders (e.g., Turner or Down syndrome) are indeed recognized causes of FTT, in the context of this specific question (often sourced from standard surgical/pediatric textbooks), **Malabsorption** is highlighted as a primary physiological mechanism where the body fails to utilize provided nutrition. *Note: In many clinical scenarios, all four options can cause FTT; however, Malabsorption is frequently tested as a high-yield medical cause.* **3. NEET-PG High-Yield Pearls:** * **Definition:** FTT is typically defined as weight for age <5th percentile or a drop across two major percentile lines on growth charts. * **Classification:** * **Inadequate Intake:** Most common cause (e.g., poverty, improper formula mixing). * **Increased Loss/Malabsorption:** Celiac disease, IBD, Cow’s milk protein allergy. * **Increased Demand:** Hyperthyroidism, Congenital Heart Disease (CHD), Chronic infections. * **Initial Investigation:** A detailed history and physical exam are more diagnostic than a battery of lab tests. The first step in management is usually nutritional supplementation and monitoring.

Question 445: Hydrocele is labelled 'vaginal' when it is:

A. Limited to the scrotum (Correct Answer)
B. Extending up to the inguinal canal
C. Communicating into the coelomic cavity
D. Extending up to the deep inguinal ring

Explanation: ### Explanation **Vaginal hydrocele** is the most common clinical type of hydrocele. It occurs due to the accumulation of excess serous fluid within the **tunica vaginalis**, a remnant of the processus vaginalis that surrounds the testis. #### 1. Why Option A is Correct In a vaginal hydrocele, the processus vaginalis is obliterated in its upper portion (near the inguinal canal) but remains patent only around the testis. Because the fluid is confined strictly to the sac surrounding the testis and does not extend superiorly, the swelling is **limited to the scrotum**. A key clinical feature is that one can "get above the swelling" during palpation. #### 2. Why Other Options are Incorrect * **Option B & D:** If the hydrocele extends up to the inguinal canal or the deep ring, it is termed an **Infantile Hydrocele**. In this type, the processus vaginalis remains patent up to the deep inguinal ring but does not communicate with the peritoneal cavity. * **Option C:** If the hydrocele communicates with the coelomic (peritoneal) cavity, it is a **Congenital Hydrocele**. This occurs due to a persistent, narrow patency of the entire processus vaginalis, allowing peritoneal fluid to drain into the scrotum (often associated with indirect inguinal hernia). #### 3. High-Yield Clinical Pearls for NEET-PG * **Transillumination Test:** The hallmark of hydrocele (positive/brilliant transillumination) because the fluid is clear. * **Primary vs. Secondary:** Vaginal hydrocele is usually primary (idiopathic). Secondary hydrocele occurs due to underlying pathology like **testicular tumor** or **epididymo-orchitis**; always perform an ultrasound to rule out malignancy in young men. * **Treatment of Choice:** * Small/Thin-walled: **Lord’s Plication**. * Large/Thick-walled: **Jaboulay’s Procedure** (Eversion of the sac). * **Aspiration:** Not recommended due to high recurrence rates and risk of infection/hematocele.

Question 446: A patient presents with unilateral hydronephrosis on ultrasound. She is asymptomatic and has normal ureteropelvic junction drainage. What is the appropriate management?

A. Pyeloplasty
B. Analgesia as needed (Correct Answer)
C. Nephrectomy
D. DJ stenting

Explanation: ### Explanation The key to this question lies in the phrase **"asymptomatic and normal ureteropelvic junction (UPJ) drainage."** In clinical urology, the presence of hydronephrosis (dilation of the renal pelvis and calyces) does not always equate to an obstruction. If the drainage is normal (confirmed via a diuretic renogram/DTPA scan showing a non-obstructive washout curve), the condition is classified as **non-obstructive hydronephrosis** or a prominent extrarenal pelvis. **Why Option B is Correct:** Since the patient is asymptomatic and there is no functional obstruction or deterioration of renal function, surgical intervention is not indicated. Management is conservative, focusing on reassurance and **analgesia as needed** if mild discomfort occurs. Observation with periodic ultrasound is the standard of care. **Why Other Options are Incorrect:** * **A. Pyeloplasty:** This is the gold standard for *obstructive* UPJ obstruction (UPJO). It is only indicated if there is evidence of impaired drainage, worsening hydronephrosis, or symptoms like recurrent pain or stones. * **C. Nephrectomy:** Reserved for a "non-functioning" kidney (usually <10-15% function) caused by chronic obstruction. It is far too aggressive for an asymptomatic patient with normal drainage. * **D. DJ Stenting:** This is a temporary measure to bypass an acute obstruction. Since no obstruction exists here, a stent would only cause unnecessary morbidity (irritative voiding symptoms). ### NEET-PG High-Yield Pearls * **Investigation of Choice (IOC)** to differentiate obstructive from non-obstructive hydronephrosis: **Diuretic Renogram (DTPA or MAG-3 scan).** * **Whitaker Test:** An invasive pressure-flow study used when renography results are equivocal. * **Anderson-Hynes Pyeloplasty:** The most common surgical procedure for symptomatic UPJO. * **Dietl’s Crisis:** Episodic severe loin pain after fluid intake (e.g., beer/tea) seen in UPJO; this would be an indication for surgery.

Question 447: Which of the following catheter materials is most suited for long-term use?

A. Latex
B. Silicone (Correct Answer)
C. Rubber
D. Polyurethane

Explanation: **Explanation:** The choice of catheter material is determined by the intended duration of use, biocompatibility, and risk of complications like encrustation and infection. **Why Silicone is the Correct Answer:** Silicone is the material of choice for **long-term catheterization (up to 12 weeks)**. It is chemically inert and highly biocompatible, which minimizes urethral irritation and the risk of stricture formation. Crucially, silicone catheters have a **larger internal lumen** compared to latex (for the same external French size) and a smoother surface, which significantly reduces the rate of bacterial biofilm formation and mineral encrustation. **Analysis of Incorrect Options:** * **Latex (A):** These are intended for short-term use (up to 14 days). Latex is more prone to encrustation and can cause "latex urethritis" due to mucosal irritation. It is also contraindicated in patients with latex allergies. * **Rubber (C):** Red rubber catheters are stiff and primarily used for intermittent catheterization or one-time drainage. They are too irritant for indwelling or long-term use. * **Polyurethane (D):** While more biocompatible than PVC, polyurethane is typically used for short-to-medium term vascular access or specialized stents rather than standard long-term urinary drainage. **High-Yield NEET-PG Pearls:** * **Duration:** Short-term (<14 days) = Latex/PVC; Long-term (>14 days to 3 months) = 100% Silicone or Hydrogel-coated. * **Size:** Measured in **French (F)** units; 1 French = 1/3 mm. * **Complication:** The most common cause of catheter blockage in long-term users is encrustation by urease-producing bacteria (e.g., *Proteus mirabilis*). * **Silver-alloy catheters:** These are specifically designed to reduce the risk of Catheter-Associated Urinary Tract Infections (CAUTI) in the short term.

Question 448: A patient diagnosed with sepsis from a urinary tract infection is being discharged. What do you plan to include in her discharge teaching?

A. Take cool baths
B. Avoid tampon use
C. Avoid sexual activity
D. Drink 8 to 10 eight-ounce glasses of water daily (Correct Answer)

Explanation: **Explanation:** The primary goal in preventing recurrent urinary tract infections (UTIs) and managing post-sepsis recovery is to maintain high urine output and promote the mechanical flushing of the bladder. **Why Option D is Correct:** Drinking **8 to 10 eight-ounce glasses of water daily** (approximately 2–2.5 liters) ensures adequate hydration. This increases urine volume and frequency of voiding, which mechanically flushes bacteria (such as *E. coli*) out of the urinary tract before they can colonize the bladder mucosa. For a patient recovering from urosepsis, maintaining renal perfusion and preventing stasis is critical. **Analysis of Incorrect Options:** * **Option A:** Patients are generally advised to avoid **bubble baths** or irritating soaps, but "cool baths" have no proven clinical benefit in preventing UTIs. Warm sitz baths are sometimes used for symptomatic relief of dysuria, but hydration is the priority for prevention. * **Option B:** While some studies suggest a minor link between tampon use and UTIs in specific individuals, they are generally considered safe. Diaphragms and spermicides are much stronger risk factors for recurrent UTIs. * **Option C:** Total avoidance of sexual activity is unnecessary. Instead, patients are advised to **void immediately after intercourse** (post-coital voiding) to flush out any bacteria introduced into the urethra. **Clinical Pearls for NEET-PG:** * **Most common organism:** *E. coli* (Uropathogenic E. coli/UPEC) is the leading cause of both uncomplicated UTIs and urosepsis. * **Behavioral modifications:** High-yield advice includes wiping from front to back, post-coital voiding, and avoiding douching. * **Cranberry Juice:** Contains proanthocyanidins which inhibit the adherence of P-fimbriated *E. coli* to uroepithelial cells (though clinical evidence for treatment is weak, it is often tested as a preventive measure). * **Urosepsis:** In the elderly, the most common presentation of urosepsis is altered mental status (delirium) rather than classic fever/dysuria.

Question 449: What is the most consistent and persistent feature of carcinoma of the bladder?

A. Frequency
B. Dysuria
C. Lump
D. Hematuria (Correct Answer)

Explanation: **Explanation:** **Hematuria** is the most common, consistent, and often the earliest clinical presentation of bladder cancer, occurring in approximately 80–90% of patients. The underlying medical concept is that malignant urothelial tumors are highly vascular and friable; as the tumor grows, these superficial vessels easily rupture, leading to bleeding. Characteristically, this hematuria is **painless, profuse, and intermittent** (often described as "total hematuria" where blood is present throughout the act of micturition). **Why other options are incorrect:** * **Frequency and Dysuria (Options A & B):** These are symptoms of bladder irritability (often termed "cystitis-like symptoms"). While they occur in bladder cancer—particularly in **Carcinoma in Situ (CIS)** or infiltrating tumors—they are less consistent than hematuria and are more frequently associated with urinary tract infections or benign prostatic hyperplasia. * **Lump (Option C):** A palpable suprapubic mass is a **late sign** indicating advanced, muscle-invasive, or metastatic disease. It is neither a consistent nor an early feature of the disease. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Cystoscopy is the most definitive investigation for diagnosing bladder cancer. * **Most Common Histology:** Transitional Cell Carcinoma (Urothelial Carcinoma) is the most common type (90%). * **Risk Factors:** Smoking (most common) and occupational exposure to aromatic amines (e.g., Aniline dyes). * **Rule of Thumb:** Any patient over 40 years presenting with painless hematuria must be investigated for malignancy until proven otherwise.

Question 450: A varicocele of the pampiniform plexus of veins has all the following characteristics except?

A. Negative transillumination test
B. Reducible
C. Cough impulse is present
D. Frequently on the right side (Correct Answer)

Explanation: **Explanation:** A varicocele is the abnormal dilation and tortuosity of the pampiniform plexus of veins within the spermatic cord. **Why Option D is the Correct Answer (The "Except" statement):** Varicoceles occur **frequently on the left side (approx. 90%)**, not the right. This is due to three anatomical reasons: 1. **Venous Drainage:** The left testicular vein enters the left renal vein at a **90-degree angle**, whereas the right testicular vein enters the IVC obliquely. 2. **Length:** The left testicular vein is longer, leading to higher hydrostatic pressure. 3. **Nutcracker Phenomenon:** The left renal vein can be compressed between the Superior Mesenteric Artery and the Aorta, causing backflow into the left testicular vein. *Note: An isolated right-sided varicocele is a "red flag" and warrants investigation for an underlying retroperitoneal mass (e.g., Renal Cell Carcinoma).* **Analysis of Incorrect Options:** * **A. Negative transillumination:** Varicoceles contain blood, not clear fluid (unlike hydroceles), so they do not transilluminate. * **B. Reducible:** The swelling typically disappears or reduces significantly when the patient lies down, as venous congestion decreases. * **C. Cough impulse:** Because the veins communicate with the abdominal venous system, an increase in intra-abdominal pressure (coughing/Valsalva) causes a palpable thrill or impulse. **Clinical Pearls for NEET-PG:** * **"Bag of Worms":** The classic clinical description on palpation. * **Infertility:** Varicoceles are the most common reversible cause of male infertility due to increased scrotal temperature and oxidative stress. * **Grading:** Grade I (Palpable only with Valsalva); Grade II (Palpable standing); Grade III (Visible through scrotal skin). * **Surgery:** Indicated for pain, testicular atrophy, or infertility. The **Gold Standard** is Microsurgical Subinguinal Varicocelectomy.

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Urology — MCQs

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