Pediatric Surgery Practice Questions

Q: In which of the following conditions are fluid levels NOT seen?

Meconium ileus. **Explanation:** In pediatric surgery, the presence or absence of air-fluid levels on an abdominal X-ray is a critical diagnostic clue for intestinal obstruction. **Why Meconium Ileus is the Correct Answer:** Meconium ileus is a distal small bowel obstruction caused by thick, inspissated meconium (commonly associated with Cystic Fibrosis). Because the meconium is extremely **viscid and "sticky,"** it does not separate into liquid and gas phases. Consequently, air-fluid levels are typically **absent**. Instead, the characteristic radiological finding is a **"Ground-glass" or "Soap-bubble" appearance (Neuhauser’s sign)**, caused by air bubbles mixing with the thick meconium. **Analysis of Incorrect Options:** * **Intussusception:** This is a mechanical obstruction where one segment of the bowel telescopes into another. As the obstruction progresses, proximal bowel loops dilate and develop classic air-fluid levels. * **Pouch Colon:** Often associated with Anorectal Malformations (ARM), the massive dilation of the colonic pouch leads to significant stasis of fecal matter and gas, resulting in a large, prominent air-fluid level. * **Duodenal Obstruction:** Whether due to atresia or stenosis, this presents with the "Double Bubble" sign. If there is a partial obstruction or if the film is taken in an erect posture, fluid levels are clearly visible within the two bubbles (stomach and duodenum). **Clinical Pearls for NEET-PG:** * **Neuhauser’s Sign:** Pathognomonic for Meconium Ileus. * **Microcolon:** A common finding on contrast enema in Meconium Ileus due to disuse. * **Sweat Chloride Test:** The gold standard investigation to perform after stabilizing a neonate with meconium ileus to rule out Cystic Fibrosis. * **Gastrografin Enema:** Used for both diagnosis and non-surgical management (therapeutic) of uncomplicated meconium ileus.

Q: All of the following are true about cystic hygroma except?

Sistrunk incision is used for surgical excision.. **Explanation:** **Cystic Hygroma** is a congenital malformation of the lymphatic system (lymphangioma) resulting from the failure of lymphatics to connect with the venous system. **Why Option D is the Correct Answer (The "Except" statement):** A **Sistrunk incision** (and the Sistrunk procedure) is specifically used for the surgical excision of a **Thyroglossal Cyst**, not a cystic hygroma. The procedure involves removing the cyst along with the mid-portion of the hyoid bone and the tract leading to the foramen caecum. For cystic hygroma, the treatment of choice is surgical excision via a skin-crease incision or the use of sclerotherapy (e.g., OK-432, Bleomycin). **Analysis of Other Options:** * **Option A:** True. Pathologically, these are multiloculated, fluid-filled spaces lined by a single layer of **endothelium**. * **Option B:** True. Because they contain clear, serous fluid and have thin walls, they are brilliantly **transilluminant**. This is a classic bedside diagnostic feature. * **Option C:** True. Approximately 75-80% of cystic hygromas occur in the **neck**, specifically in the **posterior triangle**. Other sites include the axilla, mediastinum, and groin. **NEET-PG High-Yield Pearls:** * **Association:** Frequently associated with chromosomal abnormalities like **Turner Syndrome** (45, XO) and Down Syndrome. * **Complications:** Sudden increase in size usually indicates **intracystic hemorrhage** or infection. * **Clinical Presentation:** Usually presents at birth or by age 2 as a soft, painless, compressible, and fluctuant mass. * **Management:** Complete surgical excision is preferred, but preservation of vital structures (facial nerve, etc.) is paramount, even if it means leaving some cyst wall behind.

Q: The covering over an omphalocele is?

Amniotic membrane. **Explanation:** An **omphalocele** is a midline ventral abdominal wall defect at the base of the umbilical cord. The hallmark of this condition is that the herniated viscera (usually bowel and sometimes liver) are contained within a protective sac. **Why the correct answer is right:** The omphalocele sac is a trilaminar structure. From the inside out, it consists of **peritoneum**, a middle layer of **Wharton’s jelly**, and an outer layer of **amniotic membrane**. The umbilical cord inserts directly into the apex of this sac, rather than the abdominal wall. **Why the incorrect options are wrong:** * **Skin:** In a true omphalocele, the skin stops at the edge of the defect and does not cover the herniated contents. If the defect were covered by skin, it would be classified as an umbilical hernia. * **Chorionic membrane:** The chorion is the outer fetal membrane that contributes to the placenta. It does not play a role in covering abdominal wall defects; the amnion is the membrane in direct contact with the fetus and the umbilical cord. **High-Yield Clinical Pearls for NEET-PG:** * **Omphalocele vs. Gastroschisis:** Unlike omphalocele, gastroschisis occurs to the *right* of the umbilical cord and has **no covering sac** (the bowel is exposed to amniotic fluid, leading to chemical peritonitis). * **Associated Anomalies:** Omphalocele is highly associated with chromosomal abnormalities (Trisomy 13, 18, 21) and syndromes like **Beckwith-Wiedemann Syndrome** (macroglossia, gigantism, hypoglycemia). * **Management:** Small defects can be closed primarily. Large ("Giant") omphaloceles may require staged closure using a "silo" or conservative management with escharotic agents (e.g., silver sulfadiazine) to allow the sac to epithelialize.

Q: Which statement is true about intussusception?

It is usually relieved by barium enema.. **Explanation:** **Intussusception** is the telescoping of one segment of the intestine into another, most commonly the ileum into the colon (ileocolic). It is the most common cause of intestinal obstruction in infants. **1. Why Option D is Correct:** Non-operative reduction is the first-line treatment for stable patients. **Hydrostatic reduction** (using barium or saline) or **pneumatic reduction** (using air) under fluoroscopic or ultrasound guidance is successful in 80–90% of cases. The pressure exerted by the enema pushes the intussusceptum back into its original position, relieving the obstruction. **2. Why the Other Options are Incorrect:** * **Option A:** It is **rare in neonates**. The peak incidence is between **5 and 10 months** of age. In neonates, intestinal obstruction is more likely due to atresia, malrotation, or Hirschsprung disease. * **Option B:** Fever is **not a constant feature**. The classic triad consists of intermittent colicky abdominal pain, a palpable sausage-shaped mass, and "red currant jelly" stools. Fever usually indicates late-stage complications like ischemia or perforation. * **Option C:** While 90% of cases in children are idiopathic (often linked to lymphoid hyperplasia/Peyer's patches), **pathological lead points** such as Meckel’s diverticulum, polyps, or **lymphoma** can cause intussusception, especially in children older than 2 years. **NEET-PG High-Yield Pearls:** * **Target/Donut Sign:** Seen on transverse USG (Investigation of Choice). * **Pseudokidney Sign:** Seen on longitudinal USG. * **Claw Sign:** Seen on Barium enema. * **Dance’s Sign:** Emptiness in the Right Iliac Fossa (RIF) on palpation. * **Contraindications to Enema:** Peritonitis, perforation, or shock. These cases require immediate laparotomy (Hutchinson’s maneuver).

Q: A child underwent surgery for a small intestine mass with intussusception. Histological examination of the resected tumor revealed the diagnosis. Which is the most likely tumor associated with this presentation?

Lymphoma. **Explanation:** **1. Why Lymphoma is the Correct Answer:** In the pediatric population, **Non-Hodgkin Lymphoma (specifically Burkitt Lymphoma)** is the most common primary malignancy of the small intestine. The terminal ileum is the most frequent site due to the abundance of Peyer’s patches. These tumors often act as a **pathological lead point**, causing the bowel to invaginate, leading to **intussusception**. While idiopathic intussusception is common in infants (6–24 months), intussusception in older children (typically >5 years) should highly raise suspicion of a secondary cause like Lymphoma. **2. Why Other Options are Incorrect:** * **Carcinoid:** While the most common tumor of the appendix in children, it is rare in the small intestine of pediatric patients compared to adults. * **Villous Adenoma:** These are premalignant epithelial tumors primarily found in the colon of older adults; they are virtually non-existent in the pediatric small bowel. * **Smooth Muscle Tumor (Leiomyoma/Leiomyosarcoma):** These are rare mesenchymal tumors in children. While they can cause bleeding or obstruction, they are significantly less common than Lymphoma in this age group. **3. Clinical Pearls for NEET-PG:** * **Lead Points:** In children, the most common pathological lead point for intussusception is a **Meckel’s Diverticulum**, but the most common **malignant** lead point is **Lymphoma**. * **Age Factor:** Idiopathic intussusception usually occurs under age 2. If a child presents with intussusception over the age of 5, always look for a pathological lead point (Lymphoma or Meckel’s). * **Triad of Intussusception:** Colicky abdominal pain, "currant jelly" stools, and a sausage-shaped mass. * **Diagnosis:** Ultrasound is the gold standard (Target/Donut sign).

Q: A neonate presents with a history of not passing meconium. Examination reveals an anal dimple but no anal opening. What is the investigation of choice?

Invertedogram. **Explanation:** The clinical presentation of a neonate failing to pass meconium with an absent anal opening is diagnostic of **Anorectal Malformation (ARM)**. **1. Why Invertedogram is the Correct Answer:** The **Invertedogram (Wangensteen-Rice technique)** is the traditional investigation of choice to determine the level of the lesion (High vs. Low). The infant is held upside down for 3–5 minutes to allow bowel gas to rise to the distal-most end of the rectal pouch. A radio-opaque marker is placed on the anal dimple. The distance between the gas bubble and the marker helps categorize the defect: * **Low anomaly:** Gas bubble is 1 cm from the skin. * *Note:* This must be performed only after **18–24 hours of life** to allow gas to reach the rectum. **2. Why Other Options are Incorrect:** * **A & B (X-ray Erect/Supine):** These are useful for identifying intestinal obstruction or pneumoperitoneum but cannot localize the distal rectal pouch relative to the perineum. * **C (Gastrograffin study):** Contrast studies are generally used for Hirschsprung’s disease or meconium ileus, not for the initial classification of ARM. **3. Clinical Pearls for NEET-PG:** * **Modern Shift:** While Invertedogram is the classic "textbook" answer, **Cross-table Prone Lateral X-ray** is now often preferred clinically as it is less stressful for the neonate. * **VACTERL Association:** Always screen for other anomalies (Vertebral, Anal, Cardiac, Tracheo-Esophageal, Renal, Limb). * **Management:** Low anomalies usually require a **Primary Anoplasty**, while high anomalies require a **staged procedure** (Colostomy → PSARP/Pena’s procedure → Colostomy closure).

Question 1

In which of the following conditions are fluid levels NOT seen?

Accepted Answer

Meconium ileus

Answer

Intussusception

Answer

Colon pouch

Answer

Duodenal obstruction

Question 2

All of the following are true about cystic hygroma except?

Accepted Answer

Sistrunk incision is used for surgical excision.

Answer

These are multiloculated cysts lined with endothelium.

Answer

Transillumination is positive.

Answer

The posterior neck region is more commonly involved.

Question 3

The covering over an omphalocele is?

Accepted Answer

Amniotic membrane

Answer

Skin

Answer

Chorionic membrane

Answer

None of the above

Question 4

Which of the following is a characteristic feature of congenital pyloric stenosis?

Accepted Answer

Hypokalemic metabolic alkalosis

Answer

Visible gastric peristalsis moving from left to right

Answer

Most commonly caused by carcinoma of the stomach

Answer

Projectile vomiting

Question 5

Which statement is true about intussusception?

Accepted Answer

It is usually relieved by barium enema.

Answer

It is common in neonates.

Answer

Fever is always present.

Answer

It is not associated with tumors of the intestine.

Question 6

A 3-year-old child presents with a hydrocele of the hernia sac. What is the recommended management?

Accepted Answer

Herniotomy

Answer

Herniorrhaphy

Answer

Observation only

Answer

Operate after 5 years of age

Question 7

At what age should a patent vitello-intestinal duct preferably be operated on?

Accepted Answer

6 months of age

Answer

Birth

Answer

12 months of age

Answer

3 years of age

Question 8

A child underwent surgery for a small intestine mass with intussusception. Histological examination of the resected tumor revealed the diagnosis. Which is the most likely tumor associated with this presentation?

Accepted Answer

Lymphoma

Answer

Carcinoid

Answer

Villous adenoma

Answer

Smooth muscle tumor

Question 9

A neonate presents with a history of not passing meconium. Examination reveals an anal dimple but no anal opening. What is the investigation of choice?

Accepted Answer

Invertedogram

Answer

X-ray in erect posture

Answer

X-ray in supine posture

Answer

Gastrograffin study

Question 10

A newborn presents with discharge of urine from the umbilicus for 3 days. What is the most likely diagnosis?

Accepted Answer

Urachal fistula

Answer

Meckel's diverticulum

Answer

Mesenteric cysts

Answer

Omphalocele

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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