Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 821: Which of the following is NOT used for the diagnosis of a parotid tumor?

A. MRI
B. CT
C. Open surgical biopsy (Correct Answer)
D. FNAC

Explanation: **Explanation:** The diagnosis of a parotid tumor relies on a combination of clinical examination, imaging, and cytology. **Open surgical biopsy (incisional biopsy) is strictly contraindicated** in the evaluation of parotid masses for two primary reasons: 1. **Tumor Seeding:** Most parotid tumors are Pleomorphic Adenomas. Breaking the tumor capsule during an open biopsy can lead to the spillage of mucoid material and tumor cells, resulting in a high rate of local recurrence (which is difficult to manage). 2. **Facial Nerve Injury:** An uncontrolled incision risks damaging the branches of the facial nerve, which traverses the gland. **Analysis of Other Options:** * **FNAC (Fine Needle Aspiration Cytology):** This is the gold standard initial investigation. It has high sensitivity and specificity for distinguishing benign from malignant lesions without the risk of seeding or nerve damage. * **MRI:** This is the preferred imaging modality for parotid tumors. It provides superior soft-tissue contrast, helping to delineate the tumor's relationship with the facial nerve, deep lobe involvement, and perineural spread. * **CT Scan:** Useful for evaluating bony involvement or in patients who cannot undergo MRI. It helps assess the extent of the tumor and regional lymphadenopathy. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment of Choice:** For most parotid tumors, the definitive "biopsy" is actually a **Superficial Parotidectomy** (excision of the tumor with a cuff of normal tissue while preserving the facial nerve). * **Most Common Tumor:** Pleomorphic Adenoma (Benign Mixed Tumor). * **Warthin’s Tumor:** Often bilateral, associated with smoking, and shows "hot spots" on Technetium-99m pertechnetate scans. * **Malignancy Sign:** Facial nerve palsy in the presence of a parotid mass is a strong indicator of malignancy (most commonly Adenoid Cystic Carcinoma).

Question 822: Which of the following are associated with transitional cell carcinoma of the bladder?

A. Schistosomiasis
B. Naphthylamine (Correct Answer)
C. Smoking
D. Tuberculosis of the bladder

Explanation: **Explanation:** Transitional Cell Carcinoma (TCC), now more commonly referred to as **Urothelial Carcinoma**, is the most common histological type of bladder cancer (approx. 90%). Its pathogenesis is strongly linked to prolonged exposure to environmental and industrial carcinogens. **Why Naphthylamine is Correct:** Exposure to aromatic amines, specifically **2-Naphthylamine** and benzidine, is a classic high-yield risk factor. These chemicals are prevalent in the rubber, dye, chemical, and printing industries. Once absorbed, they are metabolized in the liver and excreted in the urine, where they act as potent carcinogens on the urothelium. **Analysis of Other Options:** * **Schistosomiasis (A):** Chronic infection with *Schistosoma haematobium* is classically associated with **Squamous Cell Carcinoma (SCC)** of the bladder, not TCC. This is due to chronic irritation and squamous metaplasia. * **Smoking (C):** While smoking is actually the **most common** overall risk factor for TCC (responsible for ~50% of cases), in the context of multiple-choice questions where a specific chemical carcinogen like Naphthylamine is listed, the examiner is often testing knowledge of specific industrial exposures. (Note: If this were a "Multiple Correct" type question, Smoking would also be correct). * **Tuberculosis of the bladder (D):** Genitourinary TB typically leads to "thimble bladder" (fibrosis and contraction) and strictures, but it is not a recognized precursor or risk factor for TCC. **High-Yield Clinical Pearls for NEET-PG:** * **Most common presentation:** Painless gross hematuria. * **Gold Standard Investigation:** Cystoscopy with biopsy. * **Other Risk Factors:** Cyclophosphamide (associated with acrolein production), Phenacetin abuse, and Lynch Syndrome II. * **Field Change Effect:** The entire urothelium (from renal pelvis to urethra) is at risk because it is exposed to the same urinary carcinogens.

Question 823: Regarding lipoma of the spermatic cord, which of the following is true?

A. Soft and irregular
B. No cough impulse
C. Will not reduce
D. All of the above (Correct Answer)

Explanation: ### Explanation **Lipoma of the spermatic cord** is a common clinical entity, often encountered during inguinal hernia repairs. Despite its name, it is not a true neoplastic lipoma but rather an **extrusion of extraperitoneal fat** through the internal inguinal ring into the spermatic canal. #### Why "All of the Above" is Correct: 1. **Soft and Irregular (Option A):** Being composed of adipose tissue, the mass is characteristically soft and doughy on palpation. Unlike a tense hernia sac, it often feels lobulated or irregular. 2. **No Cough Impulse (Option B):** A true cough impulse is a feature of a patent processus vaginalis (hernia sac) where intra-abdominal pressure is transmitted directly. Since a cord lipoma is a solid fatty mass (even if it slides), it typically **lacks a true expansile cough impulse**, making it difficult to clinically distinguish from an incarcerated omental hernia. 3. **Will Not Reduce (Option C):** While the mass may slide slightly within the canal, it is anatomically attached to the cord structures or the extraperitoneal space. Unlike a simple reducible inguinal hernia, the fatty mass itself **cannot be completely reduced** into the peritoneal cavity. #### Clinical Pearls for NEET-PG: * **Most Common Benign Tumor:** Lipoma is the most common benign "tumor" of the spermatic cord. * **The "Hidden" Hernia:** It is often associated with an indirect inguinal hernia sac. If a surgeon removes a hernia sac but misses a large cord lipoma, the patient may present with a "pseudo-recurrence" due to the persistent bulge. * **Differential Diagnosis:** It must be differentiated from an **encysted hydrocele of the cord**, which is fluctuant, transilluminates, and is tense/mobile, whereas a lipoma is soft and dull to percussion. * **Management:** During hernioplasty, the lipoma should be excised or reduced to ensure a flat repair and prevent post-operative discomfort.

Question 824: Carcinoma in which surgery is rarely indicated?

A. Osteosarcoma (Correct Answer)
B. Wilm's tumor
C. Neuroblastoma
D. Rhabdomyosarcoma

Explanation: ### Explanation The management of malignant tumors is broadly divided into surgical, medical (chemotherapy), and radiation-based approaches. The question asks for the condition where **surgery is rarely indicated** as the primary or definitive treatment modality among the given options. **1. Why Osteosarcoma is the Correct Answer:** In the context of this specific question (often a repeat from older surgical entrance exams), **Osteosarcoma** is highlighted because it is a highly aggressive systemic disease. Historically, surgery alone resulted in a 90% recurrence rate due to micrometastases. Modern management dictates that **Neoadjuvant Chemotherapy (NACT)** is the mandatory first step to shrink the tumor and treat micrometastases, followed by limb-salvage surgery. While surgery is performed, it is never the *sole* or *primary* indication without systemic therapy. (Note: In some older academic contexts, "rarely indicated" refers to the fact that surgery is not curative on its own). **2. Why the other options are incorrect:** * **Wilm’s Tumor (Nephroblastoma):** Surgery (Radical Nephrectomy) is the **cornerstone** of treatment. In the NWTS (North American) protocol, primary surgery is the first step for resectable tumors. * **Neuroblastoma:** Surgery is indicated for localized tumors (Stages 1 and 2) and plays a vital role in debulking even in advanced stages after chemotherapy. * **Rhabdomyosarcoma:** This is a chemosensitive tumor, but **wide local excision** remains a primary goal of treatment whenever anatomically feasible to achieve local control. **Clinical Pearls for NEET-PG:** * **Wilm’s Tumor:** Most common renal tumor in children. Best prognosis among the options. * **Neuroblastoma:** Most common extracranial solid tumor in children; often crosses the midline (unlike Wilm's). * **Osteosarcoma:** Characterized by "Sunburst appearance" and "Codman’s triangle" on X-ray. The most important prognostic factor is the **degree of necrosis** following neoadjuvant chemotherapy.

Question 825: What is the percentage of renal vein involvement in renal cell carcinoma?

A. 2%
B. 8% (Correct Answer)
C. 16%
D. 32%

Explanation: **Explanation:** Renal Cell Carcinoma (RCC) is unique among solid tumors for its propensity for **intraluminal growth** into the venous system. This occurs via the formation of a tumor thrombus that extends from the small intrarenal veins into the main renal vein and potentially into the Inferior Vena Cava (IVC). 1. **Why 8% is correct:** According to standard surgical literature (Bailey & Love and Campbell-Walsh Urology), the involvement of the **main renal vein** occurs in approximately **4–10%** of cases (with 8% being the most commonly cited figure in competitive exams). Extension further into the **IVC** occurs in about **1%** of cases. 2. **Why other options are incorrect:** * **2%:** This is too low; while IVC involvement is rare (1%), renal vein involvement is significantly more frequent. * **16% and 32%:** These figures are too high for primary renal vein involvement. While some older series suggested higher rates, modern diagnostic imaging (CT/MRI) identifies renal vein extension in roughly 1 out of every 12-15 patients. **High-Yield Clinical Pearls for NEET-PG:** * **Staging:** Renal vein involvement signifies **Stage T3a** disease. * **Prognosis:** Interestingly, if the tumor is surgically resectable (Radical Nephrectomy + Thrombectomy), the involvement of the renal vein or IVC *does not* significantly worsen the prognosis compared to similar-sized tumors without venous extension, provided there is no nodal or distant metastasis. * **Clinical Sign:** A **left-sided varicocele** that does not empty in the supine position is a classic sign of left renal vein obstruction by an RCC tumor thrombus. * **Imaging Gold Standard:** While Contrast CT is the initial investigation, **MRI** is the gold standard for determining the proximal extent of a venous thrombus.

Question 826: Which of the following is an absolute indication for surgery in cases of benign prostatic hyperplasia?

A. Nocturnal frequency
B. Bilateral hydroureteronephrosis (Correct Answer)
C. Recurrent urinary tract infection
D. Voiding bladder pressures > 50 cm of water

Explanation: ### Explanation In Benign Prostatic Hyperplasia (BPH), the decision for surgery (typically TURP) is based on the severity of symptoms and the presence of complications. While most patients are managed medically, certain complications signify "end-organ damage" or treatment failure, necessitating surgical intervention. **1. Why Bilateral Hydroureteronephrosis is the Correct Answer:** Bilateral hydroureteronephrosis (HUN) indicates that the bladder outlet obstruction has caused high-pressure chronic urinary retention. This pressure is transmitted retrograde to the ureters and kidneys, leading to obstructive uropathy and potential renal failure. This is an **absolute indication** for surgery to decompress the system and preserve renal function. **2. Analysis of Incorrect Options:** * **Nocturnal frequency (Nocturia):** This is a bothersome Lower Urinary Tract Symptom (LUTS) but is a relative indication. It is initially managed with lifestyle modifications or medical therapy (Alpha-blockers/5-ARIs). * **Recurrent urinary tract infection:** While a common reason for surgery, a single or occasional UTI is not an absolute indication. Surgery is considered if infections are persistent or recurrent despite medical management. * **Voiding bladder pressures > 50 cm of water:** This indicates bladder outlet obstruction on urodynamic studies but is not a standalone absolute indication for surgery unless accompanied by clinical deterioration or refractory symptoms. **3. High-Yield Clinical Pearls for NEET-PG:** The **Absolute Indications for Surgery in BPH** (Mnemonic: **"Refractory WASH"**) include: * **W**—**W**orsening Renal Insufficiency (due to Bilateral HUN). * **A**—**A**zotemia/Renal failure. * **S**—**S**tones (Bladder calculi) caused by stasis. * **H**—**H**ematuria (Refractory/Recurrent gross hematuria). * **R**—**R**etention (Refractory urinary retention; failure of at least one trial of voiding without a catheter). * **U**—**U**rosepsis (Recurrent UTIs).

Question 827: All of the following are true about varicocele, EXCEPT:

A. Common on the right side (Correct Answer)
B. Can present as a late sign of renal cell carcinoma
C. Has a 'bag of worms' feeling
D. Can lead to infertility

Explanation: **Explanation:** A **varicocele** is the abnormal dilation and tortuosity of the pampiniform plexus of veins within the spermatic cord. **1. Why Option A is the Correct Answer (The False Statement):** Varicoceles are significantly more common on the **left side** (approx. 85–90%). This is due to three anatomical reasons: * **Angle of Entry:** The left testicular vein enters the left renal vein at a **90-degree angle**, whereas the right testicular vein enters the IVC at an oblique angle, allowing smoother drainage. * **Length:** The left testicular vein is longer, leading to higher hydrostatic pressure. * **Nutcracker Phenomenon:** The left renal vein can be compressed between the Superior Mesenteric Artery (SMA) and the Aorta, causing backpressure. * *Note:* An isolated **right-sided varicocele** is a "red flag" and warrants investigation for retroperitoneal pathology (e.g., a mass compressing the vein). **2. Analysis of Other Options:** * **Option B:** A sudden-onset varicocele in an older male can be a late sign of **Renal Cell Carcinoma (RCC)**, particularly if the tumor invades the renal vein (blocking the testicular vein entry). * **Option C:** On palpation, the dilated veins feel like a **"bag of worms."** This is a classic clinical description. * **Option D:** Varicoceles are the most common reversible cause of **male infertility**. They lead to increased scrotal temperature and oxidative stress, which impairs spermatogenesis (decreased count and motility). **Clinical Pearls for NEET-PG:** * **Diagnosis:** Gold standard is **Color Doppler Ultrasound**. * **Grading:** Grade I (palpable only with Valsalva), Grade II (palpable standing), Grade III (visible through scrotal skin). * **Surgery:** Indicated if there is pain, testicular atrophy, or infertility. **Sub-inguinal microsurgical varicocelectomy** is the gold standard (lowest recurrence and complication rates).

Question 828: Which of the following is the most troublesome source of bleeding during a radical retropubic prostatectomy?

A. Dorsal venous complex (Correct Answer)
B. Inferior vesical pedicle
C. Superior vesical pedicle
D. Seminal vesicular artery

Explanation: **Explanation:** In Radical Retropubic Prostatectomy (RRP), the **Dorsal Venous Complex (DVC)** is considered the most troublesome source of bleeding. The DVC is a large, valveless plexus of veins located between the pubic symphysis and the anterior surface of the prostate. Because these veins are valveless and under high pressure when the patient is in the Trendelenburg position, injury can lead to rapid, profuse hemorrhage that obscures the surgical field. Precise control of the DVC (usually via ligation or stapling) is a critical step to ensure a bloodless field for subsequent apical dissection and urethral anastomosis. **Analysis of Incorrect Options:** * **Inferior Vesical Pedicle:** While these vessels provide the primary arterial supply to the prostate and must be ligated, they are usually controlled laterally in a predictable manner. Bleeding here is significant but generally easier to manage than the DVC. * **Superior Vesical Pedicle:** This primarily supplies the upper bladder. While it may be encountered during pelvic lymph node dissection, it is not a major source of bleeding during the prostatic resection itself. * **Seminal Vesicular Artery:** These are small branches encountered during the posterior dissection. While they require cautery or clipping, they do not cause the high-volume, "troublesome" bleeding characteristic of the DVC. **High-Yield Clinical Pearls for NEET-PG:** * **Anatomy:** The DVC is also known as **Santorini’s Plexus**. * **Surgical Step:** Control of the DVC is essential for visualizing the **prostatic apex** and preserving the **external urethral sphincter** (crucial for post-op continence). * **Nerve Sparing:** The neurovascular bundles (responsible for erections) lie posterolateral to the prostate; bleeding from the DVC can lead to "blind" clamping, which risks damaging these nerves.

Question 829: All of the following are features of exstrophy of the bladder, except?

A. Epispadias
B. Cloacal membrane is present (Correct Answer)
C. Posterior bladder wall protrudes through the defect
D. Umbilical and inguinal hernia

Explanation: **Explanation:** Bladder exstrophy is a complex congenital malformation resulting from a failure of the **infra-umbilical mesenchymal migration**, leading to a defect in the lower abdominal wall and the anterior wall of the bladder. **Why Option B is the correct answer:** The fundamental embryological defect in bladder exstrophy is the **premature rupture of the cloacal membrane**. In a normal fetus, the cloacal membrane is replaced by migrating mesoderm that forms the abdominal muscles. In exstrophy, this migration fails, leaving the membrane unstable. It ruptures before the bladder can be internalized, meaning the **cloacal membrane is absent** at birth, exposing the posterior bladder wall. **Analysis of Incorrect Options:** * **Option A (Epispadias):** This is a universal feature. The defect involves the entire length of the urethra, which remains open on the dorsal surface of the penis. * **Option C (Posterior bladder wall protrudes):** Due to the absence of the anterior bladder wall and the overlying abdominal wall, the posterior bladder mucosa (trigone and ureteric orifices) is exposed and protrudes through the defect. * **Option D (Umbilical and inguinal hernia):** The wide separation of the pubic symphysis (diastasis) and the defect in the abdominal wall weaken the inguinal canals and the periumbilical area, making hernias a very common association. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Epispadias, wide pubic diastasis (seen on X-ray), and exposed bladder mucosa. * **Waddell’s Sign:** The outward rotation of the femurs due to the separation of the pubic symphysis, leading to a characteristic "waddling gait." * **Long-term Risk:** Patients have a significantly increased risk of **Adenocarcinoma** of the bladder (due to chronic irritation and glandular metaplasia of the exposed mucosa). * **Management:** Primary closure is ideally performed within the first 48–72 hours of life.

Question 830: Which of the following is NOT true about pyeloureteral junction (PUJ) obstruction?

A. Retrograde pyelography is useful to locate the site of obstruction.
B. Endoscopic pyelotomy is contraindicated. (Correct Answer)
C. Whittaker test is of clinical significance.
D. Dismembered pyeloplasty is the procedure of choice.

Explanation: **Explanation:** **Pelviureteric Junction (PUJ) Obstruction** is a common urological condition characterized by an impairment of urine flow from the renal pelvis to the proximal ureter. 1. **Why Option B is the Correct Answer (The False Statement):** Endoscopic pyelotomy (Endopyelotomy) is **not** contraindicated. In fact, it is a recognized minimally invasive treatment option for PUJ obstruction, particularly in secondary cases (failed previous surgery) or when the obstruction is short (<2 cm) and there is no crossing vessel. Since the statement claims it is contraindicated, it is the "Not True" option. 2. **Analysis of Other Options:** * **Option A:** Retrograde Pyelography (RGP) is highly useful to precisely locate the site and length of the obstruction and to rule out distal ureteric pathology before surgical intervention. * **Option C:** The Whittaker Test (pressure-flow study) is clinically significant in equivocal cases to differentiate between a dilated non-obstructed system and true mechanical obstruction. * **Option D:** Anderson-Hynes Dismembered Pyeloplasty remains the **gold standard** treatment (procedure of choice) with success rates exceeding 90-95%. It allows for the excision of the stenotic segment and transposition of the ureter if a crossing vessel is present. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** Congenital (aperistaltic segment). * **Most common extrinsic cause:** Lower pole crossing renal artery (accessory renal artery). * **Investigation of Choice (Gold Standard for Diagnosis):** DTPA or MAG-3 Diuretic Renogram (provides functional data). * **Dietl’s Crisis:** Episodic loin pain triggered by increased fluid intake or alcohol (classic presentation). * **Imaging:** Ultrasound is the initial screening tool showing hydronephrosis without hydroureter.

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Renal Cell Carcinoma

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Testicular Tumors

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