Urology Practice Questions

Q: In children, persistent priapism may result due to which of the following conditions?

Leukemia. **Explanation:** **Priapism** is defined as a persistent, usually painful, penile erection lasting more than 4 hours, unrelated to sexual stimulation. In the pediatric population, the etiology differs significantly from adults. **Why Leukemia is the Correct Answer:** Leukemia (specifically Chronic Myeloid Leukemia or Acute Lymphoblastic Leukemia) is the **most common non-sickle cell cause** of priapism in children. The underlying mechanism is **hyperviscosity** and **leukostasis**. A massive increase in the white blood cell count leads to the sludging of cells within the corpora cavernosa and the dorsal venous complex, obstructing outflow and resulting in an ischemic (low-flow) priapism. **Analysis of Incorrect Options:** * **A. Thrombosis of the venous plexus:** While venous obstruction is the end-result of ischemic priapism, primary idiopathic thrombosis is rare in children and usually secondary to an underlying hematological malignancy or sickle cell disease. * **C. Wilms' tumor:** This is the most common renal tumor in children, but it typically presents with an abdominal mass and hematuria. It does not cause priapism. * **D. Trauma:** Perineal or penile trauma usually causes **non-ischemic (high-flow) priapism** due to the formation of an arterial-lacunar fistula. While possible, it is less common as a systemic "condition" compared to the classic association with leukemia in pediatric exams. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause overall in children:** Sickle Cell Disease (approx. 65%). * **Most common malignancy-related cause:** Leukemia. * **Initial Investigation:** A Complete Blood Count (CBC) is mandatory in any child presenting with priapism to rule out leukemia or infection. * **Management:** Ischemic priapism is a surgical emergency requiring aspiration and irrigation; high-flow (traumatic) priapism is often managed conservatively.

Q: What is a predisposing factor for testicular germ cell tumors?

All of the above. **Explanation:** Testicular Germ Cell Tumors (GCTs) arise from germ cell neoplasia in situ (GCNIS). The development of these tumors is strongly linked to **Testicular Dysgenesis Syndrome**, where abnormal testicular development increases malignancy risk. * **Cryptorchidism (Undescended Testis):** This is the most significant risk factor. The risk of GCT is increased 4 to 10 times compared to the general population. Notably, the risk remains elevated even after orchiopexy, and the contralateral (normally descended) testis also carries a slightly higher risk. * **Testicular Feminization Syndrome (Complete Androgen Insensitivity Syndrome):** Individuals with a 46,XY karyotype and female phenotype have undescended testes (often intra-abdominal). There is a significant risk of developing **gonadoblastomas** or seminomas, necessitating prophylactic gonadectomy after puberty. * **Klinefelter’s Syndrome (47,XXY):** While primarily associated with primary testicular failure and infertility, patients have a significantly higher incidence of **extragonadal germ cell tumors**, particularly in the mediastinum. **Clinical Pearls for NEET-PG:** 1. **Most common GCT:** Seminoma (overall), but Yolk Sac Tumor is most common in children. 2. **Orchiopexy Timing:** Performing orchiopexy before puberty (ideally before age 1) reduces but does not eliminate the risk of malignancy; however, it makes the testis accessible for clinical examination. 3. **Genetic Marker:** Isochromosome **12p** [i(12p)] is found in almost all GCTs. 4. **Tumor Markers:** LDH (bulk), AFP (Yolk sac/Teratoma), and hCG (Choriocarcinoma/Seminoma). *Note: AFP is never elevated in pure seminoma.*

Q: In Benign Prostatic Hyperplasia (BPH), which lobe is most commonly involved?

Median lobe. **Explanation:** In Benign Prostatic Hyperplasia (BPH), the **Median lobe** (middle lobe) is the most commonly involved and clinically significant lobe. Pathologically, BPH originates in the **Transition Zone** (McNeal’s classification), which corresponds anatomically to the periurethral region and the median lobe. As this lobe enlarges, it projects into the bladder floor, often acting as a "ball-valve" mechanism that obstructs the internal urethral orifice, leading to significant Lower Urinary Tract Symptoms (LUTS). **Analysis of Options:** * **Median Lobe (Correct):** This is the primary site of adenomatous growth in BPH. Its enlargement is responsible for the classic "middle lobe projection" seen on cystoscopy or ultrasound. * **Lateral Lobes:** These are also frequently involved in BPH and contribute to urethral compression; however, the median lobe is traditionally cited as the most characteristic site of hyperplasia leading to obstruction. * **Posterior Lobe:** This lobe corresponds to the **Peripheral Zone**. This is the most common site for **Prostate Cancer**, not BPH. It is easily accessible via Digital Rectal Examination (DRE). * **Anterior Lobe:** This is largely fibromuscular stroma and contains very little glandular tissue; it is rarely involved in pathological processes like BPH or carcinoma. **High-Yield Clinical Pearls for NEET-PG:** * **Zonal Anatomy:** BPH occurs in the **Transition Zone**, while Prostate Cancer occurs in the **Peripheral Zone**. * **DRE Findings:** In BPH, the prostate feels smooth, rubbery, and the median sulcus may be obliterated. In Carcinoma, it feels hard and nodular. * **Surgical Landmark:** During TURP (Gold Standard treatment), the **verumontanum** is the key landmark used to avoid damaging the external sphincter.

Q: What characteristic of struvite (ammonium magnesium phosphate) stones makes antibiotics ineffective during treatment?

Inaccessibility of bacteria to antibiotics. ### Explanation **Correct Answer: D. Inaccessibility of bacteria to antibiotics** Struvite stones (Magnesium Ammonium Phosphate) are also known as **"infection stones"** because they form in the presence of urea-splitting organisms like *Proteus*, *Klebsiella*, and *Pseudomonas*. These bacteria produce the enzyme **urease**, which hydrolyzes urea into ammonia, raising urinary pH (>7.2). The core reason antibiotics fail is that the bacteria become **sequestered within the interstices of the stone matrix**. The stone acts as a physical nidus where bacteria are protected from both the host’s immune system and systemic antibiotics. Unless the stone is completely surgically removed, these "trapped" bacteria will continue to cause recurrent urinary tract infections (UTIs) and promote further stone growth. **Analysis of Incorrect Options:** * **A & C:** While antibiotic resistance can occur, it is not the primary reason for treatment failure. Even if the bacteria are sensitive to the antibiotic in a lab culture, the drug cannot penetrate the mineralized stone architecture to reach the bacteria at the core. * **B:** Most antibiotics used for UTIs (like Fluoroquinolones or Aminoglycosides) have excellent renal excretion and high urinary concentrations; the issue is the physical barrier of the stone, not the excretion level. **High-Yield Facts for NEET-PG:** * **Composition:** Magnesium Ammonium Phosphate and Calcium Carbonate Apatite. * **Morphology:** They typically form **Staghorn Calculi**, filling the renal pelvis and calyces. * **Radiology:** They are **radio-opaque** (though less dense than calcium oxalate). * **Pathogenesis:** High urinary pH (alkaline urine) is essential for precipitation. * **Treatment Gold Standard:** **PCNL (Percutaneous Nephrolithotomy)** to ensure complete clearance of all stone fragments ("sterilization of the collecting system").

Q: A patient presents with hematuria for many days. Investigations reveal renal calculi, calcifications in the wall of the urinary bladder, and a small contracted bladder. What is the most probable cause?

Schistosomiasis. ### Explanation The correct answer is **Schistosomiasis** (specifically *Schistosoma haematobium*). **Why Schistosomiasis is correct:** The triad of **hematuria, bladder wall calcification, and a small contracted bladder** is classic for chronic urinary schistosomiasis. The parasite eggs are deposited in the bladder wall, leading to a granulomatous reaction and intense fibrosis. * **Calcification:** The characteristic "fetal head" or "eggshell" calcification seen on X-ray represents the calcified eggs within the bladder wall. * **Contracted Bladder:** Chronic fibrosis leads to a loss of bladder compliance and reduced capacity (thimble bladder). * **Renal Calculi:** Stasis and secondary infections due to ureteric strictures often lead to stone formation. **Why the other options are incorrect:** * **Tuberculosis (TB):** While TB causes a "thimble bladder" and hematuria, **bladder wall calcification is rare** in TB. In TB, calcification is more common in the renal parenchyma (putty kidney). * **Amyloidosis:** This can cause hematuria and bladder thickening, but it does not typically present with the specific pattern of wall calcification and stone formation described. * **Carcinoma of the Urinary Bladder:** While Schistosomiasis is a risk factor for **Squamous Cell Carcinoma**, the primary malignancy itself presents as a mass lesion rather than diffuse wall calcification and a contracted bladder. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of calcification:** Terminal ureter and bladder wall. * **Pathognomonic sign:** "Eggshell" calcification of the bladder. * **Malignancy Risk:** Chronic Schistosomiasis is strongly associated with **Squamous Cell Carcinoma** (SCC) of the bladder, unlike the more common Transitional Cell Carcinoma (TCC). * **Drug of Choice:** Praziquantel.

Q: A patient presented with a hard swelling in his right testis. All are true statements except?

Trans-scrotal biopsy is needed.. In the evaluation of a hard testicular swelling, the primary concern is **Testicular Germ Cell Tumor (TGCT)**. **Why "Trans-scrotal biopsy is needed" is the correct (False) statement:** A trans-scrotal biopsy is strictly **contraindicated** in suspected testicular cancer. The lymphatic drainage of the testis follows the testicular arteries to the **Para-aortic lymph nodes**, whereas the scrotum drains into the **Superficial Inguinal lymph nodes**. Performing a biopsy through the scrotal skin risks "seeding" the tumor cells into a different lymphatic territory (scrotal contamination), which alters the clinical stage [1] and complicates the surgical management. [2] **Explanation of other options:** * **High Inguinal Exploration (Options A & C):** This is the standard surgical approach for a suspected testicular malignancy. The surgeon accesses the testis through the inguinal canal to perform a **Radical Orchidectomy**. This allows for the ligation of the spermatic cord at the level of the internal inguinal ring before manipulating the tumor, preventing hematogenous and lymphatic spread. * **Scrotal Ultrasound (Option D):** This is the initial investigation of choice. It is highly sensitive (nearly 100%) for distinguishing between intra-testicular and extra-testicular masses and confirming the presence of a solid tumor. **Clinical Pearls for NEET-PG:** * **Lymphatic Drainage:** Testis → Para-aortic nodes; Scrotum → Superficial Inguinal nodes. * **Tumor Markers:** Always check AFP, beta-hCG, and LDH before surgery. * **Rule of Thumb:** Any solid, painless intra-testicular mass is malignant until proven otherwise. * **Management:** Never biopsy; always perform a Radical Inguinal Orchidectomy.

Q: Which of the following is the most effective intravesical therapy for superficial bladder cancer?

BCG. **Explanation:** **Intravesical therapy** is the mainstay of management for Non-Muscle Invasive Bladder Cancer (NMIBC) to prevent recurrence and progression. **Why BCG is the Correct Answer:** **Bacillus Calmette-Guérin (BCG)**, a live-attenuated strain of *Mycobacterium bovis*, is considered the **gold standard** and the most effective intravesical agent. It works via a complex immune-mediated response (T-cell recruitment and cytokine release) that destroys tumor cells. It is specifically indicated for high-risk superficial tumors and **Carcinoma in Situ (CIS)**. Clinical trials consistently show that BCG is superior to chemotherapy in reducing the risk of tumor progression to muscle-invasive disease. **Analysis of Incorrect Options:** * **A. Mitomycin C:** An alkylating agent often used as a single immediate post-operative dose (within 6 hours) to prevent "seeding." While effective for low-risk tumors, it is less effective than BCG in preventing long-term recurrence and progression. * **B. Adriamycin (Doxorubicin):** An anthracycline antibiotic. It has lower efficacy and higher local toxicity compared to modern agents, making it a second-line choice. * **C. Thiotepa:** One of the earliest agents used; however, it is rarely used today due to its small molecular weight, which allows systemic absorption leading to **bone marrow suppression** (myelosuppression). **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** BCG is the treatment of choice for **CIS** and high-grade T1 lesions. * **Timing:** Should not be administered within 2–3 weeks of TURBT or if there is gross hematuria (risk of **BCGosis/Sepsis**). * **Side Effects:** Most common is irritative voiding symptoms (cystitis); most dreaded is systemic BCG sepsis. * **Maintenance:** The **Southwest Oncology Group (SWOG) protocol** (3 years of maintenance) is the standard for high-risk patients.

Q: A 40-year-old man presents with fever and scrotal pain that is not relieved by elevating the testis. Three days prior, he had sexual contact with a young female. What is the most likely diagnosis?

Torsion of testis. **Explanation:** The key to solving this clinical scenario lies in interpreting the **Prehn’s Sign**. When scrotal pain is **not relieved** by elevating the testis, it is a **Negative Prehn’s Sign**, which is a classic clinical indicator of **Torsion of Testis**. 1. **Why Torsion of Testis is correct:** Testicular torsion is a surgical emergency caused by the twisting of the spermatic cord, leading to ischemia. The pain is typically sudden and severe. A negative Prehn's sign occurs because elevation does not relieve the mechanical obstruction or the resulting ischemia; in fact, it may worsen the pain. The mention of sexual contact is often a "distractor" in exams to lead students toward an inflammatory/infectious diagnosis. 2. **Why other options are incorrect:** * **Acute Epididymitis:** This typically presents with a **Positive Prehn’s Sign** (pain is relieved by elevation). While the history of sexual contact suggests a sexually transmitted infection (like *Chlamydia*), the physical exam finding (no relief with elevation) points away from inflammation and toward torsion. * **Acute Orchitis:** Usually secondary to viral infections (e.g., Mumps) or bacterial spread. Like epididymitis, it presents with inflammatory signs, but the specific negative Prehn’s sign makes torsion more likely. * **Testicular Tumour:** Generally presents as a painless, heavy scrotal lump. Acute pain and fever are rare unless there is hemorrhage within the tumor. **NEET-PG High-Yield Pearls:** * **Golden Period:** Detorsion must ideally occur within **6 hours** to ensure 100% testicular viability. * **Angel Wing Deformity:** Horizontal lie of the testis (Bell-clapper deformity) is a predisposing factor. * **Absent Cremasteric Reflex:** The most sensitive physical exam finding for diagnosing torsion. * **Investigation of Choice:** Color Doppler Ultrasound (shows absent or decreased blood flow).

Question 1

Postmicturition dribbling is due to

Accepted Answer

Collection of urine in the U-shaped curve of the bulb of the penis

Answer

Detrusor overactivity

Answer

Urethral stricture causing decreased dribbling

Answer

Neurogenic bladder

Question 2

In assessing lower urinary tract symptoms (LUTS) in men, which of the following statements is false?

Accepted Answer

Cystourethroscopy is a good guide as an indication for surgery.

Answer

Changing patient's symptoms according to the International Prostate Symptom Score (IPSS) is routinely used.

Answer

Flow rate measurement studies and pressure-flow urodynamic studies are done.

Answer

A thorough nervous system examination is mandatory.

Question 3

In children, persistent priapism may result due to which of the following conditions?

Accepted Answer

Leukemia

Answer

Thrombosis of the venous plexus

Answer

Wilms' tumor

Answer

Trauma

Question 4

What is a predisposing factor for testicular germ cell tumors?

Accepted Answer

All of the above

Answer

Cryptorchidism

Answer

Testicular feminization syndrome

Answer

Klinefelter's syndrome

Question 5

In Benign Prostatic Hyperplasia (BPH), which lobe is most commonly involved?

Accepted Answer

Median lobe

Answer

Lateral lobe

Answer

Posterior lobe

Answer

Anterior lobe

Question 6

What characteristic of struvite (ammonium magnesium phosphate) stones makes antibiotics ineffective during treatment?

Accepted Answer

Inaccessibility of bacteria to antibiotics

Answer

Presence of resistant bacteria

Answer

Poor excretion of antibiotics

Answer

Ineffectiveness of common antibiotics

Question 7

A patient presents with hematuria for many days. Investigations reveal renal calculi, calcifications in the wall of the urinary bladder, and a small contracted bladder. What is the most probable cause?

Accepted Answer

Schistosomiasis

Answer

Amyloidosis

Answer

Tuberculosis

Answer

Carcinoma of the urinary bladder

Question 8

A patient presented with a hard swelling in his right testis. All are true statements except?

Accepted Answer

Trans-scrotal biopsy is needed.

Answer

Inguinal exploration is performed.

Answer

High inguinal exploration is performed.

Answer

Scrotal ultrasound is performed.

Question 9

Which of the following is the most effective intravesical therapy for superficial bladder cancer?

Accepted Answer

BCG

Answer

Mitomycin

Answer

Adriamycin

Answer

Thiotepa

Question 10

A 40-year-old man presents with fever and scrotal pain that is not relieved by elevating the testis. Three days prior, he had sexual contact with a young female. What is the most likely diagnosis?

Accepted Answer

Torsion of testis

Answer

Testicular tumour

Answer

Acute epididymitis

Answer

Acute orchitis

Urology — MCQs

Urology — MCQs

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