Pediatric Surgery Practice Questions

Q: What is the incidence of undescended testis in preterm infants?

30%. **Explanation:** The descent of the testis into the scrotum is a complex process that typically occurs in two stages: the transabdominal phase (7–15 weeks) and the **inguinoscrotal phase (25–35 weeks)**. Because the final descent into the scrotum occurs late in the third trimester, infants born prematurely are significantly more likely to have undescended testes (UDT). **1. Why 30% is correct:** In full-term neonates, the incidence of UDT is approximately **3%**. However, in preterm infants, the incidence rises sharply to approximately **30%** (ranging from 20–33% in various literatures) because the physiological window for descent was interrupted by birth. **2. Analysis of Incorrect Options:** * **A (<5%):** This represents the incidence in **full-term** infants (approx. 3%). * **B (10%):** This is an underestimate for preterm infants, though it may represent the incidence in low-birth-weight infants who are near term. * **C (20%):** While some studies cite 20%, 30% is the standard textbook figure (e.g., Bailey & Love, Sabiston) taught for NEET-PG regarding general prematurity. **3. High-Yield Clinical Pearls for NEET-PG:** * **Spontaneous Descent:** Most undescended testes will descend spontaneously within the first **3–4 months** of life (driven by a postnatal testosterone surge). If descent does not occur by 6 months, it is unlikely to happen. * **Incidence at 1 year:** By one year of age, the incidence in all males (term and preterm) stabilizes at approximately **0.8–1%**. * **Timing of Surgery:** The current recommendation for Orchiopexy is between **6 to 12 months** of age to preserve fertility and reduce the risk of malignancy. * **Most Common Site:** The most common position for an undescended testis is the **superficial inguinal pouch**.

Q: If the mucosa is accidentally opened during a Ramstedt operation, what is the recommended duration for withholding oral feeding?

24 Hours. **Explanation:** The **Ramstedt pyloromyotomy** is the gold-standard surgical treatment for Infantile Hypertrophic Pyloric Stenosis (IHPS). The procedure involves a longitudinal incision through the serosa and hypertrophied circular muscle fibers down to the submucosa, allowing the mucosa to bulge through. **Why 24 Hours is Correct:** Accidental mucosal perforation is the most common intraoperative complication (occurring in ~1–3% of cases). If the mucosa is breached, it must be closed immediately with fine absorbable sutures and reinforced by an omental patch. In such instances, the standard postoperative feeding protocol is delayed. **Oral feeding is withheld for 24 hours** to allow the primary repair to stabilize and to ensure there is no evidence of peritonitis or persistent leak before introducing fluids. **Analysis of Incorrect Options:** * **12 Hours (Option A):** In an uncomplicated Ramstedt procedure, feeding is typically started within 4–6 hours. However, 12 hours is insufficient time to ensure the integrity of a mucosal repair. * **48 Hours (Option C):** Withholding feeds for 48 hours is generally excessive for a small, recognized, and repaired intraoperative leak, as prolonged fasting in neonates can lead to hypoglycemia and electrolyte imbalances. * **1 Week (Option D):** This duration is reserved for major gastric resections or complex anastomoses, not a simple mucosal repair. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** Non-bilious, projectile vomiting in a 3–6 week old infant with a palpable "olive-shaped" mass. * **Metabolic Abnormality:** Hypochloremic, hypokalemic, metabolic alkalosis with paradoxical aciduria. * **Diagnosis:** Ultrasound is the investigation of choice (Pyloric thickness >4mm, length >14mm). * **Management Priority:** IHPS is a **medical emergency, not a surgical one.** Correct dehydration and electrolyte imbalances *before* taking the patient to the operating room.

Q: Unilateral undescended testes is ideally operated around what age?

6 months of age. **Explanation:** The management of undescended testes (cryptorchidism) is centered on the timing of spontaneous descent and the prevention of long-term complications. **Why 6 months is the correct answer:** Spontaneous descent of the testes is common in the first few months of life, driven by the postnatal "mini-puberty" (surge in testosterone). However, it is clinically observed that if the testis has not descended by **6 months of age**, it is highly unlikely to do so spontaneously thereafter. Current international guidelines (AAP and AUA) recommend that surgical intervention (**Orchidopexy**) should be performed between **6 and 12 months of age**. Operating at 6 months minimizes the risk of germ cell loss, improves fertility potential, and allows for easier screening for testicular malignancy later in life. **Analysis of Incorrect Options:** * **A. 2 months:** Too early. Many testes will still descend spontaneously between 2 and 4 months of age. * **C. 12 months:** While orchidopexy is often performed between 6–12 months, the "ideal" starting point for intervention is 6 months to prevent histological changes (Leydig and Sertoli cell depletion) that begin as early as 1 year. * **D. 24 months:** This is outdated practice. Delaying surgery beyond 1 year significantly increases the risk of infertility and makes the surgical procedure more complex due to potential hernia development. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Most common complication:** Inguinal hernia (due to patent processus vaginalis). * **Risk of Malignancy:** Orchidopexy does *not* eliminate the risk of testicular cancer (most commonly **Seminoma**), but it makes the testis palpable for early detection. * **Hormonal Therapy:** Generally not recommended as first-line treatment due to low efficacy compared to surgery.

Q: The EXIT (Ex utero intrapartum therapy) procedure is indicated for fetal conditions that obstruct the airway or impede ventilation. In which of the following conditions is the EXIT procedure NOT indicated?

Hypertrophic pyloric stenosis. **Explanation:** The **EXIT (Ex utero intrapartum therapy)** procedure is a specialized surgical technique performed during a Cesarean section. The goal is to maintain **fetoplacental circulation** (keeping the baby attached to the placenta) to provide oxygenation while the surgical team secures a definitive airway for a fetus with a predicted airway obstruction. **Why Option D is Correct:** **Hypertrophic Pyloric Stenosis (HPS)** is a condition characterized by hypertrophy of the pyloric sphincter, leading to gastric outlet obstruction. Crucially, HPS is **not a congenital anomaly** present at birth; it typically develops between **3 to 6 weeks of life**. Since it does not affect the airway or immediate postnatal ventilation, there is no indication for an EXIT procedure. **Why Other Options are Incorrect:** * **A & B (Cystic Hygroma and Teratoma):** Large cervical masses, such as cystic hygromas or cervical teratomas, can cause extrinsic compression of the fetal trachea. These are classic indications for EXIT to perform intubation or tracheostomy while the fetus is still oxygenated by the mother. * **C (Congenital Tracheal Stenosis):** This represents an intrinsic airway obstruction. EXIT allows time for complex airway management (like rigid bronchoscopy or bypass) before the placental support is severed. **High-Yield Clinical Pearls for NEET-PG:** * **Primary Indication for EXIT:** CHAOS (**C**ongenital **H**igh **A**irway **O**bstruction **S**yndrome). * **Key Requirement:** Maternal uterine relaxation (usually via high-dose volatile anesthetics) is essential to maintain placental blood flow. * **HPS Snapshot:** Presents with **non-bilious projectile vomiting**, "olive-shaped" mass, and **hypochloremic hypokalemic metabolic alkalosis**. It is a postnatal surgical emergency, not a fetal one.

Q: Which of the following surgical techniques is not used in the management of hypospadias?

Ombrédanne procedure. **Explanation:** The management of hypospadias involves over 200 described surgical techniques, but the modern goal is a single-stage functional and cosmetic repair. **Why Option B is the correct answer:** The **Ombrédanne procedure** is an obsolete, historical technique. It involved using a large, purse-string hooded flap of dorsal foreskin to cover the ventral defect. It is no longer used in modern practice because it resulted in a "balloon-like" unsightly appearance of the penis and had high complication rates. In the context of NEET-PG, it is frequently cited as the "incorrect" or "outdated" method. **Analysis of other options:** * **Dennis-Browne technique (A):** A classic procedure based on the principle that a buried strip of intact epithelium will spontaneously tubularize (the "buried strip" principle). * **Duckett technique (C):** Also known as the Transverse Preputial Island Flap (TPIF). It is a common one-stage repair used for **proximal (severe) hypospadias**, utilizing a vascularized flap of the inner prepuce. * **MAGPI procedure (D):** Stands for **Meatal Advancement and Glanuloplasty Incorporated**. It is the gold standard for **distal (glanular/coronal) hypospadias** without chordee. **High-Yield Clinical Pearls for NEET-PG:** 1. **Best time for surgery:** Ideally between **6 to 12 months** of age. 2. **Contraindication:** Circumcision should never be done in a child with hypospadias, as the prepuce is required for future reconstructive flaps. 3. **Chordee:** Ventral curvature of the penis often associated with hypospadias; its correction (orthoplasty) is the first step of surgery. 4. **Snodgrass Procedure (TIP):** Currently the most popular technique globally for both distal and mid-shaft hypospadias.

Q: What is the type of the given intestinal atresia?

Type III. ***Type III*** - Characterized by **complete discontinuity** of the bowel with separation between the proximal and distal segments and a **V-shaped mesenteric defect**. - Includes subtypes **IIIa** (gap in mesentery) and **IIIb** (apple-peel deformity with spiral configuration of the distal small bowel around a single feeding vessel). *Type I* - Features an **intact bowel wall** with only a **mucosal/submucosal web** causing luminal obstruction. - The **mesentery remains continuous** and there is no external deformity of the bowel. *Type II* - Involves **complete obstruction** with blind-ending proximal and distal segments connected by a **fibrous cord**. - The **mesentery remains intact** without the characteristic V-shaped defect seen in Type III. *Type IV* - Characterized by **multiple atresias** at different levels of the small intestine resembling a **string of sausages**. - Results from extensive **vascular compromise** during fetal development affecting multiple bowel segments simultaneously.

Q: What is the most common cause of pseudopancreatic cysts in children?

Traumatic pancreatitis. **Explanation:** **Traumatic pancreatitis** is the most common cause of pseudopancreatic cysts in children. Unlike adults, where chronic alcoholism and gallstones are the primary triggers, pediatric pseudocysts are predominantly associated with **blunt abdominal trauma**. The classic mechanism involves a "handlebar injury" (bicycle accidents) or a direct blow to the epigastrium, which compresses the pancreas against the vertebral column. This leads to ductal disruption, leakage of pancreatic enzymes, and the subsequent formation of a fluid collection walled off by granulation tissue (rather than an epithelial lining, hence "pseudo"). **Analysis of Incorrect Options:** * **Choledochal cyst (A):** While these are congenital dilatations of the biliary tree common in children, they are anatomical malformations of the bile duct, not a cause of pancreatic pseudocysts. * **Annular pancreas (B):** This is a congenital anomaly where pancreatic tissue encircles the duodenum. It typically presents with neonatal intestinal obstruction, not pseudocyst formation. * **Drug-induced pancreatitis (C):** Drugs (like Valproate or L-asparaginase) can cause acute pancreatitis in children, but they are statistically less frequent causes of pseudocysts compared to trauma. **Clinical Pearls for NEET-PG:** * **Definition:** A pseudocyst is a collection of pancreatic juice enclosed by a wall of fibrous or granulation tissue, occurring typically **4–6 weeks** after an episode of acute pancreatitis. * **Most common site of injury:** The **neck of the pancreas** (due to compression against the spine). * **Diagnosis:** Ultrasound is the initial screening tool; **CECT** is the gold standard for defining anatomy. * **Management:** Many pediatric pseudocysts resolve spontaneously. Intervention (internal drainage like cystogastrostomy) is indicated if the cyst is symptomatic, enlarging, or infected.

Question 1

What is the incidence of undescended testis in preterm infants?

Accepted Answer

30%

Answer

<5%

Answer

10%

Answer

20%

Question 2

If the mucosa is accidentally opened during a Ramstedt operation, what is the recommended duration for withholding oral feeding?

Accepted Answer

24 Hours

Answer

12 Hours

Answer

48 Hours

Answer

1 week

Question 3

Unilateral undescended testes is ideally operated around what age?

Accepted Answer

6 months of age

Answer

2 months of age

Answer

12 months of age

Answer

24 months of age

Question 4

The EXIT (Ex utero intrapartum therapy) procedure is indicated for fetal conditions that obstruct the airway or impede ventilation. In which of the following conditions is the EXIT procedure NOT indicated?

Accepted Answer

Hypertrophic pyloric stenosis

Answer

Cystic hygroma

Answer

Teratoma

Answer

Congenital tracheal stenosis

Question 5

A newborn with meningomyelocele is scheduled for surgery. What should be immediately used to cover the defect?

Accepted Answer

Normal saline gauze

Answer

Povidone iodine gauze

Answer

Tincture benzoin gauze

Answer

Methylene blue gauze

Question 6

Which type of hypospadias does not typically require surgical intervention?

Accepted Answer

Glandular

Answer

Coronal

Answer

Penile

Answer

Perineal

Question 7

Which of the following surgical techniques is not used in the management of hypospadias?

Accepted Answer

Ombrédanne procedure

Answer

Dennis-Brown technique

Answer

Duckett technique

Answer

MAGPI procedure

Question 8

A boy with undescended testis, what is the primary concern that necessitates surgical intervention?

Accepted Answer

Impotence

Answer

Cosmetic reasons

Answer

Infertility

Answer

Risk of malignancy

Question 9

What is the type of the given intestinal atresia?

Accepted Answer

Type III

Answer

Type I

Answer

Type II

Answer

Type IV

Question 10

What is the most common cause of pseudopancreatic cysts in children?

Accepted Answer

Traumatic pancreatitis

Answer

Choledochal cyst

Answer

Annular pancreas

Answer

Drug-induced pancreatitis

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?