Pediatric Surgery — MCQs
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Kasai procedure is used in the treatment of which condition?
Two days after birth, a child developed respiratory distress and had a scaphoid abdomen. Breath sounds were decreased on the left side. After bag and mask ventilation, an endotracheal tube was inserted, and the maximal cardiac impulse shifted to the right side. What should be the next step in management?
Which condition is treated with a Bishop-Koop operation?
Regarding Gastroschisis and omphalocele, which of the following statements is false?
Cleft palate is ideally repaired at what age?
What is your diagnosis in this neonate with visible bowel loops at birth?
Which of the following statements regarding gastroschisis is TRUE?
Which one of the following is not a feature of congenital hypertrophic pyloric stenosis?
True about intussusceptions in children?
What is the approximate incidence of anastomotic leak following repair of esophageal atresia?
Pediatric Surgery Indian Medical PG Practice Questions and MCQs
Question 41: Kasai procedure is used in the treatment of which condition?
- A. Congenital Biliary Atresia (Correct Answer)
- B. Primary Sclerosing Cholangitis
- C. Cholangiocarcinoma
- D. Carcinoma of the gallbladder
Explanation: ### Explanation **Correct Answer: A. Congenital Biliary Atresia** **Congenital Biliary Atresia (CBA)** is a progressive fibro-inflammatory obliteration of the extrahepatic biliary tree, leading to obstructive jaundice in neonates. The **Kasai procedure**, also known as **Hepatoportoenterostomy**, is the standard initial surgical treatment. In this procedure, the obliterated extrahepatic biliary remnants are excised, and a Roux-en-Y loop of the jejunum is anastomosed directly to the transected fibrous stroma at the porta hepatis. This allows bile to drain from the microscopic patent intrahepatic ducts directly into the intestine. **Why other options are incorrect:** * **Primary Sclerosing Cholangitis (B):** This is a chronic cholestatic liver disease characterized by inflammation and fibrosis of both intra- and extrahepatic bile ducts. Management is primarily medical (UDCA) or liver transplantation; the Kasai procedure has no role here. * **Cholangiocarcinoma (C):** This is a malignancy of the bile ducts. Treatment involves radical surgical resection (like Whipple’s procedure or hemihepatectomy) or palliative stenting, depending on the location (Klatskin tumor). * **Carcinoma of the Gallbladder (D):** Treatment typically involves radical cholecystectomy (including liver wedge resection and lymphadenectomy), not portoenterostomy. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** The Kasai procedure is most successful when performed early, ideally **before 60 days of life**. Success rates drop significantly after 90 days. * **Diagnosis:** The "Gold Standard" for diagnosis is **Intraoperative Cholangiography (IOC)**. On ultrasound, the **"Triangular Cord Sign"** is a classic finding. * **Prognosis:** While Kasai can delay the need for surgery, Biliary Atresia remains the **most common indication for liver transplantation in the pediatric age group**.
Question 42: Two days after birth, a child developed respiratory distress and had a scaphoid abdomen. Breath sounds were decreased on the left side. After bag and mask ventilation, an endotracheal tube was inserted, and the maximal cardiac impulse shifted to the right side. What should be the next step in management?
- A. Confirm the position of the endotracheal tube (Correct Answer)
- B. Emergency surgery
- C. Nasogastric tube insertion
- D. Chest X-ray to confirm the position of the endotracheal tube
Explanation: ### Explanation **Diagnosis:** The clinical presentation of respiratory distress, a **scaphoid abdomen**, and decreased breath sounds on the left side in a neonate is classic for **Congenital Diaphragmatic Hernia (CDH)**. **1. Why Option A is Correct:** In CDH, the abdominal viscera occupy the thoracic cavity, causing pulmonary hypoplasia and shifting the mediastinum to the contralateral side. A critical complication during resuscitation is **accidental right mainstem bronchus intubation**. Because the left lung is already compromised/hypoplastic, if the endotracheal tube (ETT) enters the right bronchus, the only functional lung is bypassed, leading to a sudden shift of the cardiac impulse further to the right and acute clinical deterioration. Therefore, the immediate priority is to **clinically confirm the ETT position** (via auscultation and checking the depth) to ensure bilateral ventilation before proceeding to other interventions. **2. Why Other Options are Incorrect:** * **Option B (Emergency surgery):** CDH is no longer considered a surgical emergency. The current standard of care is **preoperative stabilization** (managing pulmonary hypertension and ensuring adequate oxygenation). Surgery is delayed for 24–48 hours until the infant is stable. * **Option C (Nasogastric tube insertion):** While an NG tube is essential to decompress the stomach and prevent further lung compression, it is not the *immediate* next step when a patient deteriorates post-intubation. * **Option D (Chest X-ray):** While a CXR is needed to confirm the diagnosis and ETT position, clinical assessment (Option A) must come first in an acutely deteriorating neonate to rule out malpositioning or a tension pneumothorax. **Clinical Pearls for NEET-PG:** * **Avoid Bag and Mask Ventilation:** In suspected CDH, BMV is contraindicated as it distends the stomach and intestines in the chest, further compressing the lungs. **Immediate endotracheal intubation** is the preferred airway management. * **Most Common Site:** Bochdalek hernia (posterolateral), most commonly on the **left side** (85%). * **Key Triad:** Respiratory distress, Scaphoid abdomen, and Dextrocardia (mediastinal shift). * **Management Goal:** Focus on "Gentle Ventilation" to avoid barotrauma to the hypoplastic lungs.
Question 43: Which condition is treated with a Bishop-Koop operation?
- A. Intussusception
- B. Meconium ileus (Correct Answer)
- C. Midgut volvulus
- D. Duodenal atresia
Explanation: **Explanation:** **Meconium Ileus** is the correct answer. It is a common presentation of Cystic Fibrosis where thick, inspissated meconium causes distal small bowel obstruction. The **Bishop-Koop procedure** (a distal chimney enterostomy) is a specialized surgical technique used when simple irrigation fails. In this procedure, the proximal end of the divided bowel is anastomosed to the side of the distal limb, leaving the distal end as a venting stoma. This allows for the forward passage of intestinal contents while providing a port for postoperative irrigation with N-acetylcysteine to dissolve the remaining meconium. **Analysis of Incorrect Options:** * **Intussusception:** Primarily managed via non-operative hydrostatic or pneumatic reduction. If surgery is required, it involves manual reduction (Hutchinson’s maneuver) or bowel resection with primary anastomosis. * **Midgut Volvulus:** The definitive treatment is **Ladd’s Procedure**, which involves counter-clockwise detorsion, widening the mesenteric base, and performing an appendectomy. * **Duodenal Atresia:** Treated with a **Duodenoduodenostomy** (Kimura’s "diamond-shaped" anastomosis). **NEET-PG High-Yield Pearls:** * **Bishop-Koop vs. Santulli:** In Bishop-Koop, the *distal* limb is the stoma (chimney). In the Santulli procedure, the *proximal* limb is the stoma. * **Radiology:** Meconium ileus often shows a "ground glass" or "soap bubble" appearance (Neuhauser sign) on X-ray due to air mixing with meconium. * **Association:** 90% of infants with meconium ileus have Cystic Fibrosis.
Question 44: Regarding Gastroschisis and omphalocele, which of the following statements is false?
- A. Intestinal obstruction is common in Gastroschisis.
- B. Liver is typically an intra-abdominal organ in Omphalocele.
- C. Gastroschisis is frequently associated with multiple anomalies. (Correct Answer)
- D. The umbilical cord is attached to the Omphalocele sac.
Explanation: ### Explanation **1. Why Option C is the Correct (False) Statement:** In pediatric surgery, a key distinction between these two defects is their association with other anomalies. **Gastroschisis** is typically an isolated defect (occurring in >90% of cases), with the exception of intestinal atresia (due to vascular accidents). Conversely, **Omphalocele** is frequently associated with chromosomal abnormalities (Trisomy 13, 18, 21) and syndromes like Beckwith-Wiedemann. Therefore, the statement that Gastroschisis is associated with multiple anomalies is false. **2. Analysis of Other Options:** * **Option A (True):** In Gastroschisis, the bowel is exposed to amniotic fluid, leading to a thick inflammatory peel (peristaltic dysfunction) and a high risk of intestinal atresia or malrotation, both of which cause obstruction. * **Option B (True):** While the liver *can* be found in large omphaloceles (Omphalocele Major), it is typically an intra-abdominal organ in smaller defects. In Gastroschisis, the defect is small and to the right of the cord, so the liver almost never herniates. * **Option D (True):** In Omphalocele, the umbilical cord inserts directly into the apex of the protective sac. In Gastroschisis, the cord is attached normally to the abdominal wall, separate from the defect. **3. Clinical Pearls for NEET-PG:** * **Location:** Gastroschisis is usually to the **right** of the umbilical cord; Omphalocele is **midline**. * **Sac:** Omphalocele has a protective sac (amnion/peritoneum); Gastroschisis has **no sac**. * **Maternal Age:** Gastroschisis is more common in **younger mothers** (associated with smoking/NSAIDs); Omphalocele is associated with **advanced maternal age**. * **AFP:** Maternal Serum Alpha-Fetoprotein (MSAFP) is significantly higher in Gastroschisis than in Omphalocele.
Question 45: Cleft palate is ideally repaired at what age?
- A. 5 months of age
- B. 1 year of age (Correct Answer)
- C. Before going to school
- D. 6 to 8 years of age
Explanation: The timing of cleft palate repair is a critical balance between facilitating normal speech development and avoiding interference with facial bone growth. ### **Explanation of the Correct Answer** **Option B (1 year of age)** is the ideal time for repair. The primary goal of palatoplasty is to provide a functional mechanism for **speech**. Speech development (babbling and early word formation) typically begins around 12 months. Repairing the palate between **9 to 12 months** ensures that the levator veli palatini muscles are reconstructed before the child develops compensatory speech habits (like glottal stops). ### **Analysis of Incorrect Options** * **Option A (5 months):** While Cleft **Lip** is repaired early (Rule of 10s, usually at 3 months), repairing the **Palate** this early is technically difficult due to the small size of the oral cavity and carries a high risk of midface growth retardation. * **Option C (Before school):** Waiting until age 4–5 is too late. By this time, the child will have developed significant "cleft palate speech" (hypernasality), which often requires extensive speech therapy even after a successful surgery. * **Option D (6 to 8 years):** This is far too late for primary repair. Surgery at this age is usually reserved for secondary procedures or alveolar bone grafting (typically done at 7–9 years). ### **NEET-PG High-Yield Pearls** * **Rule of 10s (Millard’s Rule for Cleft Lip):** 10 weeks old, 10 lbs weight, 10 g/dL Hemoglobin. * **Surgical Techniques:** * **Von Langenbeck:** Simple closure using bipedicled mucoperiosteal flaps. * **V-Y Pushback (Wardill-Kilner):** Designed to lengthen the palate. * **Most common complication:** Post-operative fistula formation (usually at the junction of the hard and soft palate). * **Multidisciplinary approach:** Management involves a surgeon, orthodontist (for maxillary arch issues), and ENT specialist (due to high incidence of **Otitis Media with Effusion** caused by Eustachian tube dysfunction).
Question 46: What is your diagnosis in this neonate with visible bowel loops at birth?
- A. Gastroschisis (Correct Answer)
- B. Omphalocele
- C. Congenital Diaphragmatic Hernia
- D. Bladder exstrophy
Explanation: ***Gastroschisis*** - **Visible bowel loops at birth** without a **membranous covering**, typically protruding through a **right paraumbilical** abdominal wall defect. - The exposed bowel appears **matted and thickened** due to direct contact with **amniotic fluid** during fetal development. *Omphalocele* - Features a **membranous sac covering** the protruding abdominal contents, which is absent in this case. - The defect occurs **centrally at the umbilical cord insertion** and is associated with other **congenital anomalies** in 50-70% of cases. *Congenital Diaphragmatic Hernia* - Presents with **respiratory distress** and **bowel sounds in the chest**, not visible bowel loops on the abdominal surface. - Diagnosed by **chest X-ray** showing bowel loops in the **thoracic cavity** and **mediastinal shift**. *Bladder exstrophy* - Involves exposure of the **bladder mucosa** on the lower abdominal wall, not bowel loops. - Associated with **epispadias** and **wide pubic diastasis**, presenting as a red mucosal surface below the umbilicus.
Question 47: Which of the following statements regarding gastroschisis is TRUE?
- A. Herniation occurs through the umbilical cord.
- B. Herniation occurs to the right of the umbilical cord due to obliteration of the right umbilical vein. (Correct Answer)
- C. The herniated contents are covered with an amniotic sac.
- D. It is associated with multiple anomalies.
Explanation: **Explanation:** **Gastroschisis** is a full-thickness defect in the abdominal wall, typically measuring less than 4 cm. 1. **Why Option B is Correct:** The defect almost always occurs to the **right of the umbilical cord**. The prevailing embryological theory suggests that during development, the **right umbilical vein** undergoes involution (obliteration). This creates a localized area of weakness in the abdominal wall, leading to herniation. Unlike omphalocele, the umbilical cord attachment in gastroschisis is normal and separate from the defect. 2. **Why Other Options are Incorrect:** * **Option A & C:** These describe **Omphalocele**. In gastroschisis, there is **no peritoneal or amniotic sac** covering the bowel. Consequently, the bowel loops are directly exposed to amniotic fluid, leading to a thickened, edematous, and "matted" appearance (chemical peritonitis). * **Option D:** Gastroschisis is usually an **isolated finding** and is not typically associated with chromosomal abnormalities (unlike omphalocele, which is linked to Trisomy 13, 18, and 21). The only significant association is **intestinal atresia** (in ~10% of cases) due to vascular compromise. **High-Yield Clinical Pearls for NEET-PG:** * **Maternal Risk Factor:** Strongly associated with **young maternal age** and smoking. * **Management:** Immediate management involves wrapping the bowel in sterile saline-soaked gauze and a "bowel bag." Definitive treatment is primary closure or staged closure using a **Silo**. * **AFP Levels:** Maternal Serum Alpha-Fetoprotein (MSAFP) is significantly higher in gastroschisis than in omphalocele. * **Comparison Table:** | Feature | Gastroschisis | Omphalocele | | :--- | :--- | :--- | | **Location** | Right of Umbilicus | Through Umbilicus | | **Sac** | Absent | Present | | **Anomalies** | Rare (except Atresia) | Common (Cardiac, Beckwith-Wiedemann) |
Question 48: Which one of the following is not a feature of congenital hypertrophic pyloric stenosis?
- A. More common in males
- B. Projectile vomiting
- C. Diarrhea (Correct Answer)
- D. Malnutrition
Explanation: **Explanation:** **Congenital Hypertrophic Pyloric Stenosis (CHPS)** is characterized by the hypertrophy of the circular muscle fibers of the pylorus, leading to a functional gastric outlet obstruction. **Why Diarrhea is the Correct Answer:** In CHPS, there is a physical obstruction at the pylorus that prevents gastric contents from entering the duodenum. Because the food cannot pass into the intestines, the patient typically presents with **constipation** (due to lack of stool bulk) rather than diarrhea. If any stool is passed, it is often small, dry "ribbon-like" stools. **Analysis of Other Options:** * **A. More common in males:** This is a classic feature. CHPS has a strong male predilection, typically affecting **first-born males** with a ratio of approximately 4:1. * **B. Projectile vomiting:** This is the hallmark clinical presentation. The vomiting is **non-bilious** (as the obstruction is proximal to the ampulla of Vater) and occurs with increasing force shortly after feeding. * **C. Malnutrition:** Due to persistent vomiting and the inability to retain feeds, infants rapidly develop dehydration, weight loss, and features of malnutrition if not treated promptly. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolic Profile:** The classic derangement is **Hypochloremic, Hypokalemic, Metabolic Alkalosis** with **Paradoxical Aciduria**. * **Physical Exam:** A palpable, olive-shaped mass in the epigastrium (best felt after vomiting or during a "test feed") and visible gastric peristalsis. * **Diagnosis:** Ultrasound is the investigation of choice (Pyloric thickness >4mm, length >14-16mm). * **Treatment:** Initial management is resuscitation with **0.45% or 0.9% Normal Saline with Potassium**. The definitive surgery is **Ramstedt’s Pyloromyotomy**.
Question 49: True about intussusceptions in children?
- A. Most common variety is ileocolic. (Correct Answer)
- B. Associated with a pathological lead point.
- C. May be seen after viral infection.
- D. Can be relieved by barium enema.
Explanation: **Explanation:** Intussusception is the most common cause of intestinal obstruction in infants (6–18 months). It occurs when a proximal segment of the bowel (intussusceptum) telescopes into the lumen of the adjacent distal segment (intussuscipiens). **1. Why Option A is Correct:** The **ileocolic** variety is the most common type (seen in ~80-90% of cases). This occurs because the lymphoid tissue (Peyer’s patches) in the terminal ileum is abundant; when these patches hypertrophy, they act as a physiological lead point, allowing the ileum to prolapse into the cecum. **2. Analysis of Other Options:** * **Option B:** In children, 90% of cases are **idiopathic** (no pathological lead point). Pathological lead points (e.g., Meckel’s diverticulum, polyps, lymphoma) are more common in adults or children older than 2 years. * **Option C:** While there is a known association with **viral infections** (like Adenovirus or Rotavirus) causing mesenteric lymphadenopathy and Peyer’s patch hypertrophy, the question asks for the "most true" or definitive characteristic. However, in many NEET-PG patterns, if multiple options seem plausible, the anatomical classification (ileocolic) remains the gold standard fact. * **Option D:** While barium enemas were historically used for diagnosis and hydrostatic reduction, the current **standard of care** is **Pneumatic (Air) reduction** or Ultrasound-guided saline reduction, as they are safer and carry a lower risk of chemical peritonitis if perforation occurs. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Intermittent colicky abdominal pain, "Currant jelly" stools, and a sausage-shaped mass (usually in the right upper quadrant). * **Dance’s Sign:** Emptiness in the Right Iliac Fossa. * **Investigation of Choice:** Ultrasonography (shows the **"Target" or "Donut" sign** in transverse view and "Pseudokidney" sign in longitudinal view). * **Treatment:** Non-operative reduction (Air/Hydrostatic) is preferred unless there are signs of peritonitis or gangrene, which necessitate surgery (Hutchinson’s maneuver).
Question 50: What is the approximate incidence of anastomotic leak following repair of esophageal atresia?
- A. <5%
- B. 5-10%
- C. 10-20% (Correct Answer)
- D. 25-30%
Explanation: **Explanation:** Anastomotic leak is one of the most significant early complications following the surgical repair of Esophageal Atresia with or without Tracheoesophageal Fistula (EA/TEF). **1. Why 10-20% is correct:** The esophagus lacks a serosal layer, which inherently makes any anastomosis more prone to leakage compared to the rest of the gastrointestinal tract. In pediatric surgery, the incidence of leak typically ranges between **10% and 20%**. The primary risk factors include excessive tension at the suture line (especially in "long-gap" atresia), ischemia of the esophageal ends (due to extensive mobilization), and poor nutritional status of the neonate. Most leaks are "contained" and managed conservatively with chest tube drainage and parenteral nutrition. **2. Analysis of Incorrect Options:** * **<5% (Option A):** This is too low. While surgical techniques have improved, the anatomical challenges (lack of serosa and segmental blood supply) keep the rate higher than 5%. * **5-10% (Option B):** While some high-volume centers report rates in this range, the standard textbook and epidemiological consensus for exam purposes remains 10-20%. * **25-30% (Option D):** This is excessively high. A leak rate this high would indicate poor surgical technique or an unviable repair; such rates are not representative of modern neonatal surgical outcomes. **Clinical Pearls for NEET-PG:** * **Most common complication (Overall):** Gastroesophageal Reflux (GERD) occurs in up to 40-50% of cases. * **Most common early complication:** Anastomotic leak. * **Most common late complication:** Anastomotic stricture (often secondary to a previous leak or GERD). * **Investigation of Choice:** A water-soluble contrast swallow (Gastrografin) is typically performed 5–7 days post-operatively to check for leaks before starting oral feeds. * **Management:** Minor leaks often heal spontaneously with conservative management; major leaks with tension pneumothorax or sepsis require urgent re-exploration.
Practice by Chapter
Neonatal Physiology
Practice Questions
Congenital Anomalies Overview
Practice Questions
Neonatal Intestinal Obstruction
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Necrotizing Enterocolitis
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Hirschsprung's Disease
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Anorectal Malformations
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Pediatric Hernias
Practice Questions
Pyloric Stenosis
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Biliary Atresia
Practice Questions
Pediatric Tumors
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Congenital Diaphragmatic Hernia
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Pediatric Trauma
Practice Questions
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