Urology — MCQs

Urology Indian Medical PG Practice Questions and MCQs

Question 511: Strangury is defined as:

A. Renal colic
B. Pain due to a twisted ovarian cyst
C. Biliary colic
D. Painful, frequent attempts at micturition with only a small quantity of urine passed each time (Correct Answer)

Explanation: **Explanation:** **Strangury** is a classic urological symptom characterized by a painful, frequent, and urgent desire to urinate, where only very small volumes of urine are passed, often drop by drop. This occurs due to intense irritation or spasm of the bladder neck or the trigone. The underlying mechanism involves the bladder wall attempting to contract against an irritation (like a stone or severe infection), leading to a distressing "squeezing" sensation. **Analysis of Options:** * **Option D (Correct):** Accurately describes the clinical triad of strangury: pain, frequency, and minimal urine output. It is most commonly seen in conditions like **vesical calculus** (bladder stone), acute cystitis, or bladder neck obstruction. * **Option A (Incorrect):** Renal colic is a sudden, severe crescendo-decrescendo pain originating in the loin and radiating to the groin, typically caused by a ureteric stone. While painful, it does not specifically define the act of difficult micturition. * **Option B (Incorrect):** Pain from a twisted ovarian cyst is a gynecological emergency presenting as acute pelvic pain, often associated with nausea, but it is unrelated to the urinary symptoms of strangury. * **Option C (Incorrect):** Biliary colic is right upper quadrant pain caused by gallbladder contraction against a stone in the cystic duct. **Clinical Pearls for NEET-PG:** * **Strangury vs. Tenesmus:** While strangury refers to the urinary system, **tenesmus** is the equivalent sensation in the rectum (painful, ineffective urge to defecate). * **Commonest Cause:** In surgical exams, strangury is most frequently associated with a **stone at the bladder neck**. * **LUTS:** Strangury is considered a severe "irritative" Lower Urinary Tract Symptom (LUTS).

Question 512: At what age is orchidopexy for cryptorchidism typically performed?

A. 1 to 2 years (Correct Answer)
B. 5 to 6 years
C. Puberty
D. Neonatal period

Explanation: **Explanation:** The primary goal of orchidopexy in cryptorchidism (undescended testis) is to preserve fertility and facilitate early screening for malignancy. **1. Why 1 to 2 years is correct:** Spontaneous descent of the testis is common in the first few months of life but rarely occurs after the age of 6 months. Current clinical guidelines (including AUA and AAP) recommend performing orchidopexy between **6 to 18 months** of age. Histological changes, such as the loss of germ cells and Leydig cell atrophy, begin as early as 1 year. Therefore, performing the surgery by age 1 (and definitely before age 2) optimizes the chances of future spermatogenesis and reduces the risk of testicular torsion. **2. Why other options are incorrect:** * **Neonatal period:** Surgery is avoided here because many testes will descend spontaneously by 3–6 months of age. Additionally, anesthetic risks are higher in neonates. * **5 to 6 years:** Waiting until school age significantly increases the risk of irreversible germ cell damage and infertility. * **Puberty:** By puberty, the risk of malignant transformation (seminoma) is higher, and the fertility potential of the undescended testis is virtually lost. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Most common complication:** Infertility (bilateral > unilateral). * **Malignancy Risk:** Orchidopexy does *not* eliminate the risk of testicular cancer, but it makes the testis palpable for easier screening. The most common tumor in an undescended testis is **Seminoma**. * **Associated condition:** Indirect inguinal hernia is present in over 90% of cases due to a patent processus vaginalis. * **Hormonal therapy:** HCG or GnRH analogues have low success rates and are generally not recommended as primary treatment.

Question 513: Which of the following is NOT a cause of bladder cancer?

A. Alcohol (Correct Answer)
B. Naphthylamine exposure
C. Cigarette smoking
D. Schistosoma hematobium

Explanation: **Explanation:** The correct answer is **Alcohol**. While alcohol is a known risk factor for several malignancies (such as esophageal, hepatic, and breast cancer), it has **no proven epidemiological link** to the development of bladder cancer. **Analysis of Options:** * **Naphthylamine exposure (Option B):** This is a classic occupational risk factor. Aromatic amines (like 2-Naphthylamine and benzidine) used in the dye, rubber, and leather industries are potent bladder carcinogens. They are metabolized in the liver and excreted in the urine, where they induce DNA damage in the urothelium. * **Cigarette smoking (Option C):** This is the **most common** risk factor for bladder cancer (responsible for ~50% of cases). Tobacco contains alpha and beta-naphthylamine and nitrosamines. The risk is proportional to the duration and intensity of smoking. * **Schistosoma hematobium (Option D):** This parasite is a major cause of bladder cancer in endemic areas (e.g., Egypt). Chronic irritation and inflammation lead to **Squamous Cell Carcinoma (SCC)**, unlike smoking which typically causes Transitional Cell Carcinoma (TCC). **High-Yield Clinical Pearls for NEET-PG:** 1. **Most common type:** In the West, it is **Transitional Cell Carcinoma (Urothelial)**; in areas with endemic Schistosomiasis, it is **Squamous Cell Carcinoma**. 2. **Drugs:** Long-term use of **Cyclophosphamide** (metabolite Acrolein) and **Phenacetin** abuse are significant risk factors. 3. **Protective factor:** High fluid intake is generally considered protective as it dilutes carcinogens and increases voiding frequency. 4. **Presentation:** The classic presentation is **painless gross hematuria** in an elderly male.

Question 514: Which of the following statements is true regarding bladder stones?

A. More common in girls than boys.
B. Treatment involves lithopexy. (Correct Answer)
C. Always form in the kidneys and pass down to the bladder.
D. Usually asymptomatic.

Explanation: Bladder stones (vesical calculi) are a common urological condition, often associated with urinary stasis or infection. **Explanation of the Correct Option:** **Option B (Treatment involves lithopexy)** is the correct statement. **Lithopexy** (or cystolitholapaxy) is the surgical procedure where bladder stones are crushed using a lithotrite (mechanical, ultrasonic, or laser) and then irrigated out. For very large or hard stones, open suprapubic cystolithotomy may be required. **Explanation of Incorrect Options:** * **Option A:** Bladder stones are significantly **more common in boys** than girls. This is primarily due to the longer, narrower male urethra and the higher incidence of posterior urethral valves or bladder outlet obstruction in male children. * **Option C:** While some stones migrate from the kidneys (secondary stones), many bladder stones form **de novo** in the bladder (primary stones) due to stasis (e.g., BPH, neurogenic bladder) or foreign bodies (e.g., indwelling catheters). * **Option D:** Bladder stones are **rarely asymptomatic**. They typically present with the classic triad of frequency, dysuria, and **sudden interruption of the urinary stream** accompanied by referred pain to the tip of the penis (in males) or labia (in females). **High-Yield Clinical Pearls for NEET-PG:** * **Composition:** Most bladder stones are composed of **ammonium uric acid**, calcium oxalate, or magnesium ammonium phosphate (struvite). * **Jackstone Calculus:** A specific type of calcium oxalate dihydrate stone with a "spiky" appearance, often found in the bladder. * **Radiology:** Most bladder stones are radio-opaque; however, pure uric acid stones are radiolucent on X-ray but visible on CT or Ultrasound. * **Associated Risk:** Chronic irritation from long-standing bladder stones is a known risk factor for **Squamous Cell Carcinoma** of the bladder.

Question 515: Which of the following complications of cryptorchidism cannot be prevented by orchiopexy?

A. Testicular tumor (Correct Answer)
B. Epididymo-orchitis
C. Torsion of the testis
D. Sexual ambiguity

Explanation: **Explanation:** The primary goal of orchiopexy (surgical fixation of the testis in the scrotum) is to improve fertility potential and facilitate easier clinical examination. However, it does **not** eliminate the inherent risk of malignancy. **1. Why Testicular Tumor is the Correct Answer:** Cryptorchidism is associated with a 3 to 10-fold increased risk of testicular germ cell tumors (most commonly **Seminoma**). While performing orchiopexy before puberty (ideally before age 1) may slightly reduce this risk, it **cannot prevent** it. The increased risk is attributed to underlying dysgenetic factors present in the undescended testis. The main benefit of orchiopexy regarding malignancy is that it brings the testis to a palpable location, allowing for early detection through self-examination. **2. Analysis of Incorrect Options:** * **Torsion of the testis:** Orchiopexy involves fixing the testis to the scrotal wall (tunica vaginalis), which physically prevents the testis from twisting on its spermatic cord, thereby preventing torsion. * **Epididymo-orchitis:** By placing the testis in the scrotum, the normal anatomical relationship is restored, and the risk of trauma or secondary infections associated with an abnormal position (like the inguinal canal) is reduced. * **Sexual ambiguity:** This is a feature of Disorders of Sex Development (DSD) and is a potential *association* or *cause* of cryptorchidism, not a complication arising from it. Orchiopexy is a corrective surgery for the position of the testis, not a treatment for the underlying chromosomal or hormonal cause of ambiguity. **High-Yield Clinical Pearls for NEET-PG:** * **Ideal age for Orchiopexy:** 6 to 12 months (to preserve spermatogonia). * **Most common site:** Inguinal canal. * **Most common tumor:** Seminoma (overall); however, if the testis remains abdominal, the risk of seminoma is even higher. * **Contralateral risk:** The normally descended testis in a patient with unilateral cryptorchidism also carries an increased risk of malignancy.

Question 516: Which of the following is NOT a characteristically brilliantly transilluminant swelling?

A. Hydrocele
B. Meningocele
C. Lipoma (Correct Answer)
D. Cystic hygroma

Explanation: **Explanation:** The core concept behind **transillumination** is the ability of a swelling to allow light to pass through it. This occurs when the contents are clear, serous fluid and the covering is thin. **Why Lipoma is the Correct Answer:** A **Lipoma** is a benign tumor composed of **adipose (fat) tissue**. Because fat is a solid, opaque substance, it does not allow light to pass through. Therefore, lipomas are characteristically **non-transilluminant**. On clinical examination, they are typically soft, lobulated, and exhibit a "slippery sign." **Analysis of Incorrect Options:** * **Hydrocele:** This is a collection of clear serous fluid between the layers of the tunica vaginalis. It is the classic example of a **brilliantly transilluminant** swelling in the scrotum. * **Meningocele:** This involves the protrusion of meninges containing **Cerebrospinal Fluid (CSF)** through a vertebral defect. Since CSF is a clear fluid, these swellings are transilluminant. * **Cystic Hygroma:** A congenital multilocular lymphatic malformation (usually in the neck) filled with clear lymph. Due to its clear fluid content and thin walls, it is **brilliantly transilluminant**. **NEET-PG High-Yield Pearls:** 1. **Brilliantly Transilluminant Swellings:** Hydrocele, Cystic hygroma, Meningocele, Ranula, and Epididymal cyst. 2. **The "Slippery Sign":** Pathognomonic for Lipoma; the edge of the tumor eludes the finger on pressure. 3. **Differential Diagnosis:** If a scrotal swelling is *not* transilluminant, consider a Hematocele (blood), Pyocele (pus), or Testicular Tumor (solid tissue). 4. **Exception:** A long-standing hydrocele with a thickened, calcified wall may lose its transillumination.

Question 517: What is the optimal timing for performing an orchidopexy?

A. Before 12 months of age (Correct Answer)
B. After 24 months of age
C. At 3 years of age
D. At 5 years of age

Explanation: **Explanation:** The optimal timing for orchidopexy in a child with an undescended testis (cryptorchidism) is currently recommended between **6 to 12 months of age**. **1. Why "Before 12 months" is correct:** Spontaneous descent of the testis is rare after the age of 6 months. Early surgical intervention is critical because histological changes, such as the loss of germ cells and Leydig cell atrophy, begin as early as 1 year of age. Performing orchidopexy before 12 months (ideally by 18 months at the latest) maximizes the potential for fertility, facilitates easier screening for testicular cancer (which has a higher incidence in these patients), and may reduce the risk of malignant transformation. **2. Why the other options are incorrect:** * **Options B, C, and D (After 24 months, 3 years, and 5 years):** Waiting beyond the first year of life significantly increases the risk of irreversible germ cell depletion and tubular fibrosis. Delayed surgery correlates with lower sperm counts in adulthood and a higher risk of infertility. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** The superficial inguinal pouch is the most common location for an undescended testis. * **Spontaneous Descent:** Most testes that are undescended at birth will descend by **3 months** of age. If not descended by 6 months, surgery is indicated. * **Malignancy Risk:** Orchidopexy does not eliminate the risk of testicular cancer (most commonly **Seminoma**), but it makes the testis accessible for clinical examination. * **Hormonal Therapy:** HCG or GnRH analogues are generally not recommended as primary treatment due to low efficacy compared to surgery. * **Associated Condition:** Patent processus vaginalis is found in over 90% of cases.

Question 518: Carcinoma of the prostate commonly metastasizes to the vertebrae, which of the following is the primary reason for this predilection?

A. Because valveless communication exists with Batson's periprostatic venous plexus. (Correct Answer)
B. Via lymphatic drainage to the sacral lymph nodes.
C. Due to direct anterior spread.
D. None of the above.

Explanation: **Explanation:** **The Correct Answer: A** The primary route for prostate cancer metastasis to the axial skeleton (specifically the lumbar vertebrae) is the **Batson’s venous plexus**. This is a network of **valveless veins** that connects the deep pelvic veins and thoracic veins to the internal vertebral venous plexuses. Because these veins lack valves, changes in intra-abdominal pressure (e.g., coughing or straining) can cause retrograde flow, allowing malignant cells from the prostatic venous plexus to bypass the systemic circulation (and the lungs) and deposit directly into the vertebral bodies. This explains why the spine is the most common site of distant metastasis in prostate cancer. **Why Other Options are Incorrect:** * **Option B:** While prostate cancer does spread to regional lymph nodes (obturator and internal iliac nodes), lymphatic spread to sacral nodes is not the primary mechanism for the characteristic vertebral "drop" metastases. * **Option C:** Direct anterior spread would involve the bladder or pubic symphysis, not the vertebrae, which are located posteriorly. Furthermore, Denonvilliers' fascia acts as a strong physical barrier, usually limiting direct posterior spread to the rectum. **High-Yield Clinical Pearls for NEET-PG:** * **Osteoblastic Lesions:** Prostate cancer is the classic cause of **osteoblastic (bone-forming)** metastases, visible as radiodense spots on X-ray. * **PSA & Acid Phosphatase:** Elevated PSA is the standard marker; however, elevated **Prostatic Acid Phosphatase (PAP)** specifically correlates with extracapsular spread and bone metastasis. * **Most Common Site:** The most common site of bone metastasis is the **lumbar spine**, followed by the femur and pelvis. * **Diagnosis:** The gold standard for detecting bone metastasis is a **Technetium-99m bone scan**.

Question 519: A 5-year-old male child presents with a single testis in the scrotum. Examination reveals the contralateral testis is palpable in the inguinal canal. What is the recommended management for this child?

A. Orchiopexy (Correct Answer)
B. Observation until puberty
C. Orchidectomy
D. Androgen administration

Explanation: ### Explanation **Correct Option: A. Orchiopexy** The clinical presentation describes **Undescended Testis (Cryptorchidism)**. In this case, the testis is palpable in the inguinal canal, which is the most common site for an undescended testis. * **The Concept:** Spontaneous descent of the testis is rare after the age of 6 months. To prevent complications such as infertility, testicular torsion, and to facilitate screening for testicular malignancy, surgical intervention is required. * **Timing:** The current gold standard recommendation is to perform **Orchiopexy between 6 to 12 months of age**, and certainly before 2 years, to preserve germ cell function. Since this child is 5 years old, immediate Orchiopexy is the definitive management. **Why other options are incorrect:** * **B. Observation until puberty:** This is contraindicated. Delayed surgery significantly increases the risk of infertility (due to heat-induced germ cell depletion) and the risk of malignant transformation (Seminoma). * **C. Orchidectomy:** This is usually reserved for post-pubertal males with a unilateral undescended testis or cases where the testis is severely atrophic/non-viable. In a 5-year-old, every effort is made to salvage the testis. * **D. Androgen administration:** Hormonal therapy (HCG or GnRH) has a very low success rate and is generally not recommended as a primary treatment, especially for testes located in the inguinal canal. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Most common complication:** Infertility (bilateral > unilateral). * **Most common malignancy:** Seminoma (even if orchiopexy is done, the risk of cancer remains higher than the general population, but the testis becomes palpable for screening). * **Retractile Testis:** Unlike cryptorchidism, a retractile testis can be brought down into the scrotum and stays there without tension (due to overactive cremasteric reflex); it requires observation, not surgery.

Question 520: The prostatic growth in benign prostatic hypertrophy is due to:

A. Testosterone
B. 17 estradiol
C. Dihydrotestosterone (Correct Answer)
D. Oestrogen

Explanation: **Explanation:** The development of Benign Prostatic Hyperplasia (BPH) is an androgen-dependent process. The primary mediator of prostatic growth is **Dihydrotestosterone (DHT)**. Inside the prostate, the enzyme **5-alpha reductase (Type 2)** converts circulating testosterone into DHT. DHT is significantly more potent than testosterone because it has a higher affinity for androgen receptors and forms a more stable receptor-ligand complex. Once bound, it induces the transcription of growth factors (like TGF-β and FGF) that lead to the hyperplasia of stromal and epithelial cells, particularly in the **transition zone** of the prostate. **Analysis of Options:** * **A. Testosterone:** While it is the precursor, testosterone itself does not directly stimulate significant prostatic growth. In men with a genetic deficiency of 5-alpha reductase, the prostate remains small despite normal testosterone levels. * **B & D. 17-estradiol/Oestrogen:** Although estrogen levels increase with age and may sensitize the prostate to DHT by increasing androgen receptor expression, they are not the primary drivers of growth in BPH. **High-Yield Clinical Pearls for NEET-PG:** * **Anatomical Site:** BPH occurs in the **Transition Zone**, whereas Prostate Cancer typically occurs in the **Peripheral Zone**. * **Pharmacology Link:** **Finasteride and Dutasteride** are 5-alpha reductase inhibitors used to treat BPH by lowering intraprostatic DHT levels, effectively shrinking the gland. * **Histology:** BPH is a true hyperplastic process (increase in cell number), not hypertrophy (increase in cell size), despite the name. * **Key Risk Factors:** Aging and the presence of functioning testes (androgens).

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Urological Anatomy

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Hematuria Evaluation

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Urinary Calculi

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Benign Prostatic Hyperplasia

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Prostate Cancer

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Bladder Cancer

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Renal Cell Carcinoma

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Testicular Tumors

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Urinary Tract Infections

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Urinary Incontinence

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Genitourinary Trauma

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Pediatric Urology Basics

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Urology — MCQs

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