Urology Practice Questions

Q: Imatinib mesylate, used in the treatment of GIST, is an inhibitor of which of the following?

Tyrosine kinase. **Explanation:** **Imatinib mesylate** is a revolutionary targeted therapy that acts as a selective **Tyrosine Kinase Inhibitor (TKI)**. In the context of Gastrointestinal Stromal Tumors (GIST), it specifically targets the **KIT (CD117)** proto-oncogene, which encodes a type II receptor tyrosine kinase. In most GIST cases, a gain-of-function mutation leads to constitutive activation of this receptor, driving uncontrolled cell proliferation. Imatinib binds to the ATP-binding site of the kinase domain, effectively "switching off" the signaling pathway. **Analysis of Options:** * **Option A (IL-12):** Interleukin-12 is a cytokine involved in T-cell differentiation. Inhibitors like Ustekinumab target IL-12/IL-23 and are used in Psoriasis/Crohn’s disease, not GIST. * **Option B (TNF-alpha):** Tumor Necrosis Factor-alpha inhibitors (e.g., Infliximab, Adalimumab) are used in inflammatory conditions like Rheumatoid Arthritis and IBD. * **Option D (VEGF):** Vascular Endothelial Growth Factor inhibitors (e.g., Bevacizumab) target angiogenesis. While some TKIs (like Sunitinib) have anti-VEGF activity, Imatinib’s primary mechanism in GIST is KIT and PDGFR inhibition. **High-Yield Clinical Pearls for NEET-PG:** * **GIST Marker:** The most sensitive and specific marker for GIST is **CD117 (c-KIT)**. **DOG1** is another highly specific marker. * **Other Indications:** Imatinib is also the first-line treatment for **Chronic Myeloid Leukemia (CML)**, where it targets the **BCR-ABL** tyrosine kinase (Philadelphia chromosome). * **Resistance:** If a GIST patient becomes resistant to Imatinib, the second-line drug of choice is **Sunitinib**, followed by **Regorafenib**. * **Origin:** GIST arises from the **Interstitial Cells of Cajal (ICC)**, the pacemakers of the GI tract.

Q: Carcinoma of the penis is rarest among which population group?

Jews. **Explanation:** The correct answer is **Jews**. The rarity of penile carcinoma in this population is attributed to the practice of **neonatal circumcision**. **1. Why Jews?** Penile carcinoma is strongly associated with chronic irritation caused by **smegma** (a byproduct of desquamated epithelial cells and bacteria) accumulating under the prepuce in uncircumcised males. Smegma acts as a potential carcinogen. In the Jewish community, ritual circumcision (Brit Milah) is performed on the **8th day of life**. Early circumcision prevents the accumulation of smegma and significantly reduces the risk of Human Papillomavirus (HPV) infection (specifically types 16 and 18), which are major risk factors for the disease. **2. Why other options are incorrect:** * **Americans and Swedes:** While these populations have lower incidences compared to developing nations, circumcision is not universal or performed as early as in the Jewish faith. In these regions, the incidence is roughly 1 per 100,000. * **Indians:** India has a higher incidence of penile cancer, particularly in rural areas where hygiene may be poor and circumcision is not a routine practice among the majority population. **High-Yield Clinical Pearls for NEET-PG:** * **Protective Factor:** Circumcision is only protective if performed in **neonatal life/infancy**. Circumcision performed in adulthood does not provide the same level of protection against penile cancer. * **Risk Factors:** Phimosis (present in ~25-75% of cases), HPV 16 & 18, smoking, and poor hygiene. * **Premalignant Lesions:** Erythroplasia of Queyrat (on the glans), Bowen’s disease (on the shaft), and Balanitis Xerotica Obliterans (BXO). * **Most Common Histology:** Squamous Cell Carcinoma (SCC). * **Lymphatic Spread:** Usually follows a step-wise pattern to the **superficial inguinal nodes** first.

Q: Which statement is false regarding hydrocele?

The testis is separate from the swelling.. **Explanation:** In a vaginal hydrocele, the fluid accumulates within the **tunica vaginalis**, which is a serous sac that almost entirely surrounds the testis (except for the posterior border). Because the testis is enveloped by this fluid-filled sac, it is **not separate** from the swelling; rather, the testis lies within it and is typically non-palpable unless the fluid is drained or the hydrocele is very lax. **Analysis of Options:** * **Option C (Correct):** This is the false statement. In a hydrocele, the testis is "invaginated" into the sac and cannot be felt as a distinct entity. In contrast, in a **spermatocele** or **epididymal cyst**, the testis can be felt separately from the swelling. * **Option A:** True. Hydrocele fluid is typically a clear, straw-colored **transudate** containing albumin and fibrinogen. If it becomes an exudate, it usually indicates secondary infection or underlying malignancy. * **Option B:** True. This is a key clinical feature used to differentiate a hydrocele from an inguinal hernia. In a hydrocele, you can **"get above the swelling"** because the pathology is confined to the scrotum, allowing palpation of the spermatic cord at the neck of the scrotum. * **Option D:** True. A large or tense hydrocele can extend upwards toward the external inguinal ring, making it difficult to clinically identify a concomitant inguinal hernia. **NEET-PG High-Yield Pearls:** * **Transillumination Test:** The classic diagnostic sign for hydrocele (positive due to clear serous fluid). * **Lord’s Plication:** Surgical technique used for thin-walled hydroceles. * **Jaboulay’s Procedure:** Eversion of the sac, used for large, thick-walled hydroceles. * **Primary vs. Secondary:** Always perform an ultrasound in young men with a sudden hydrocele to rule out **testicular tumors**, which can cause a secondary hydrocele.

Q: A 70-year-old male chronic smoker is diagnosed with carcinoma in situ of the urinary bladder and undergoes transurethral resection (TUR). There is now a recurrence with the tumor extending into the muscle. What is the recommended treatment?

Radical cystectomy. ### Explanation The management of bladder cancer is primarily determined by the **depth of invasion**. This patient has progressed from Carcinoma in situ (CIS) to **Muscle-Invasive Bladder Cancer (MIBC)**, defined as stage T2 or higher. **Why Radical Cystectomy is the Correct Choice:** The standard of care for any patient with muscle-invasive bladder cancer (T2-T4a) who is fit for surgery is **Radical Cystectomy** with urinary diversion. Once the tumor involves the detrusor muscle, the risk of lymphatic and systemic metastasis increases significantly. Intravesical therapies are no longer sufficient because they cannot penetrate deep enough into the bladder wall to eradicate the invasive component. **Analysis of Incorrect Options:** * **A & B (Intravesical BCG/Chemotherapy):** These are the treatments of choice for **Non-Muscle Invasive Bladder Cancer (NMIBC)**, such as Ta, T1, or CIS. Since the tumor has now extended into the muscle, these local therapies are considered inadequate and would result in disease progression. * **C (Palliative Radiotherapy):** Radiotherapy is generally reserved for patients who are unfit for major surgery or as part of a "Bladder Preserving Protocol" (Tri-modality therapy) in highly selected cases. It is not the primary "recommended treatment" for a standard surgical candidate. **Clinical Pearls for NEET-PG:** * **Gold Standard:** Radical cystectomy includes removal of the bladder, prostate, and seminal vesicles in men, and the bladder, uterus, ovaries, and anterior vaginal wall in women (**Anterior Pelvic Exenteration**). * **Staging:** The detrusor muscle invasion marks the transition from T1 to **T2**. * **BCG Failure:** If CIS or T1 tumors recur or persist despite intravesical BCG, radical cystectomy is the next step (BCG-refractory disease). * **Smoking:** The most significant risk factor for bladder cancer; it increases the risk of recurrence and progression.

Q: Which of the following is NOT true about urethral injuries?

Catheterize the patient immediately.. **Explanation:** In the management of suspected urethral injury, **immediate catheterization is strictly contraindicated.** Attempting to pass a catheter in a patient with a urethral tear can convert a partial tear into a complete transection and introduce infection into a pelvic hematoma. The gold standard initial investigation to assess urethral integrity is a **Retrograde Urethrogram (RUG)**. Only after a RUG has ruled out injury should catheterization be attempted. **Analysis of Options:** * **Option A (Correct):** As stated, blind catheterization is dangerous. If the patient cannot void, a suprapubic cystostomy (SPC) is the preferred method of bladder drainage. * **Option B:** Posterior urethral injuries (specifically at the membranous urethra) are highly associated with **pelvic fractures** (up to 10% of cases), often due to the shearing forces at the puboprostatic ligaments. * **Option C:** High-energy trauma causing pelvic fractures often results in concomitant injuries to the bladder (extraperitoneal or intraperitoneal) along with the posterior urethra. * **Option D:** **Blood at the external urethral meatus** is the most reliable clinical sign of urethral injury. Other signs include a "high-riding prostate" on digital rectal exam and a perineal "butterfly" hematoma (in anterior injuries). **Clinical Pearls for NEET-PG:** * **Anterior Urethra Injury:** Most common site is the **bulbar urethra**, usually due to a "straddle injury" (falling astride). * **Posterior Urethra Injury:** Most common site is the **membranous urethra**, usually due to pelvic fractures. * **Triad of Urethral Injury:** Blood at meatus, inability to void, and a palpable distended bladder. * **Management:** If RUG shows a tear, the initial management is typically a **Suprapubic Catheter (SPC)** followed by delayed repair (Urethroplasty).

Q: A 23-year-old male known to have sickle cell anemia presents to the emergency department with a painful erection that started 3 hours ago. What is this condition called?

Priapism. **Explanation:** The clinical presentation of a prolonged, painful erection (lasting >4 hours) in a patient with sickle cell anemia is a classic description of **Priapism**. **1. Why Priapism is correct:** Priapism is a urological emergency characterized by a persistent erection unrelated to sexual stimulation. In patients with **Sickle Cell Anemia**, it is typically the **Ischemic (Low-flow)** type. The underlying mechanism involves the sickling of red blood cells within the corpora cavernosa, leading to venous stasis, outflow obstruction, and subsequent hypoxia and acidosis within the penile tissue. **2. Why the other options are incorrect:** * **Balanitis:** This refers to the inflammation of the glans penis, usually due to infection (fungal/bacterial) or poor hygiene. It presents with redness, itching, and discharge, not a persistent erection. * **Hypospadias:** A congenital anomaly where the urethral meatus opens on the ventral aspect of the penis. It is a structural defect present from birth. * **Peyronie Disease:** A condition involving the formation of fibrous plaques in the tunica albuginea, leading to penile curvature and painful erections during intercourse, but not a continuous, spontaneous state of tumescence. **Clinical Pearls for NEET-PG:** * **Ischemic Priapism** is a "compartment syndrome" of the penis. Blood gas analysis of the aspirate shows **low pO2, high pCO2, and low pH**. * **Management:** Initial steps include hydration and analgesia. Definitive treatment involves **aspiration of blood** followed by intracavernosal injection of alpha-agonists (e.g., **Phenylephrine**). * If conservative measures fail, surgical shunts (e.g., Winter’s or Quackels shunt) are performed. * **Stuttering Priapism:** Recurrent, short-lived episodes common in sickle cell patients; often managed with hormonal therapy (GnRH analogs) or PDE5 inhibitors (prophylactically).

Q: Subcapsular orchiectomy is done for cancer of?

Prostate. **Explanation:** **Subcapsular orchiectomy** (also known as Riba’s operation) is a surgical procedure where the androgen-producing glandular tissue (the parenchyma) is removed while leaving the tunica albuginea and epididymis intact. **Why Prostate Cancer is the Correct Answer:** Prostate cancer is an **androgen-dependent tumor**. The primary goal of treatment in metastatic or advanced cases is **Androgen Deprivation Therapy (ADT)**. Since 95% of testosterone is produced by the Leydig cells in the testes, a bilateral orchiectomy serves as "surgical castration," rapidly reducing serum testosterone to castrate levels (<50 ng/dL). The subcapsular technique is preferred over total orchiectomy for prostate cancer because it is **psychologically less traumatic** for the patient, as the scrotum does not feel entirely empty. **Why Other Options are Incorrect:** * **Testicular Cancer:** The standard of care is **Radical Inguinal Orchiectomy**. A subcapsular approach is contraindicated because it violates the testicular tunics, risking local tumor spillage and altering the lymphatic drainage. * **Penis & Urethra Cancer:** These malignancies are not primarily driven by testosterone. Treatment usually involves local excision, partial/total penectomy, and lymph node dissection, rather than hormonal manipulation via orchiectomy. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard for ADT:** While LHRH agonists (e.g., Leuprolide) are common, bilateral orchiectomy remains the "gold standard" for rapid testosterone depletion. * **Indication:** Primarily used for **Metastatic Prostate Cancer (Stage D)** or as palliative care for bone pain. * **Comparison:** Subcapsular orchiectomy is as effective as total orchiectomy in lowering testosterone but offers a better cosmetic/psychological outcome.

Question 1

Imatinib mesylate, used in the treatment of GIST, is an inhibitor of which of the following?

Accepted Answer

Tyrosine kinase

Answer

IL-12

Answer

TNF-alpha

Answer

VEGF

Question 2

Carcinoma of the penis is rarest among which population group?

Accepted Answer

Jews

Answer

Americans

Answer

Indians

Answer

Swedes

Question 3

Which statement is false regarding hydrocele?

Accepted Answer

The testis is separate from the swelling.

Answer

The fluid is almost always a transudate.

Answer

A hydrocele allows palpation of the spermatic cord above the swelling.

Answer

A hydrocele can obscure an inguinal hernia.

Question 4

Regarding testicular torsion, all are true EXCEPT?

Accepted Answer

Immediate management is mainly medical and surgery is indicated later.

Answer

Is to be differentiated from acute epididymitis.

Answer

Bilaterality is common.

Answer

May not present with dysuria.

Question 5

Which of the following substances is NOT used as an irrigant during transurethral resection of the prostate?

Accepted Answer

Normal Saline

Answer

1.5% Glycine

Answer

5% Dextrose

Answer

Distilled Water

Question 6

A 70-year-old male chronic smoker is diagnosed with carcinoma in situ of the urinary bladder and undergoes transurethral resection (TUR). There is now a recurrence with the tumor extending into the muscle. What is the recommended treatment?

Accepted Answer

Radical cystectomy

Answer

Intravesical BCG

Answer

Intravesical chemotherapy

Answer

Palliative radiotherapy

Question 7

A 70-year-old man presents with urinary retention and back pain. Which investigation should be performed?

Accepted Answer

Serum acid phosphatase

Answer

Serum Calcium

Answer

Serum alkaline phosphatase

Answer

Serum electrophoresis

Question 8

Which of the following is NOT true about urethral injuries?

Accepted Answer

Catheterize the patient immediately.

Answer

Can be associated with fracture pelvis.

Answer

Bladder injury is associated with posterior urethral injuries.

Answer

Blood at the external urethral meatus is an important feature.

Question 9

A 23-year-old male known to have sickle cell anemia presents to the emergency department with a painful erection that started 3 hours ago. What is this condition called?

Accepted Answer

Priapism

Answer

Balanitis

Answer

Hypospadias

Answer

Peyronie disease

Question 10

Subcapsular orchiectomy is done for cancer of?

Accepted Answer

Prostate

Answer

Testes

Answer

Penis

Answer

Urethra

Urology — MCQs

Urology — MCQs

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