Pediatric Surgery Practice Questions

Q: What is the best treatment protocol for an enterogenic cyst?

Resection with intestine segment. **Explanation:** Enterogenic cysts (also known as enteric duplication cysts) are congenital anomalies that occur along the alimentary tract. The correct treatment is **resection with the adjacent intestinal segment** because these cysts typically share a **common muscular wall and a common blood supply** with the native intestine. 1. **Why Option B is correct:** Attempting to remove only the cyst (enucleation) often compromises the blood supply to the adjacent normal bowel, leading to ischemia or necrosis. Furthermore, because the cyst and the bowel share a common wall, separation is technically difficult and risks perforation. Therefore, formal resection of the cyst along with the involved segment of the intestine followed by primary anastomosis is the gold standard. 2. **Why other options are incorrect:** * **Enucleation (A):** Generally avoided due to the shared blood supply and muscularis layer, except in rare cases (e.g., very small cysts in the duodenum or esophagus where resection is high-risk). * **Aspiration/Marsupialization (C):** These are inadequate as the cyst lining contains secretory mucosa (often ectopic gastric mucosa), which will lead to fluid re-accumulation or peptic ulceration/perforation. * **Observation (D):** Not recommended because of the high risk of complications like intestinal obstruction, intussusception, volvulus, or malignant transformation in adults. **Clinical Pearls for NEET-PG:** * **Most common site:** Ileum (specifically the mesenteric side). * **Key Feature:** They are always located on the **mesenteric border** (unlike Meckel’s diverticulum, which is anti-mesenteric). * **Histology:** Must have a well-developed coat of smooth muscle and an alimentary epithelial lining. * **Ectopic Tissue:** Gastric mucosa is found in about 20-30% of cases, which can lead to GI bleeding.

Q: What is the commonest site of metastasis of Wilm's tumour?

Lungs. **Explanation:** Wilms’ tumor (Nephroblastoma) is the most common primary renal malignancy in children. The correct answer is **Lungs** because Wilms’ tumor primarily spreads via the hematogenous route. Once the tumor cells enter the renal vein and the inferior vena cava, they are carried directly to the pulmonary capillary bed, making the lungs the most frequent site of distant metastasis (seen in approximately 10-15% of patients at diagnosis). **Analysis of Options:** * **Lungs (Correct):** The first and most common site of distant spread. Pulmonary nodules are often the defining feature of Stage IV disease. * **Liver:** This is the second most common site of hematogenous spread. It occurs less frequently than pulmonary metastasis. * **Bones and Brain:** These are extremely rare sites for classic Wilms’ tumor. If a pediatric renal tumor metastasizes to the bone, a clinician should strongly suspect **Clear Cell Sarcoma of the Kidney (CCSK)**, often nicknamed the "Bone-seeking tumor." If it spreads to the brain, **Rhabdoid Tumor of the Kidney** should be considered. **High-Yield Clinical Pearls for NEET-PG:** * **Most common presentation:** An asymptomatic, large, smooth abdominal mass that does not cross the midline (unlike Neuroblastoma). * **Staging:** Unlike many tumors, Wilms’ tumor staging is based on both surgical and pathological findings (NWTS Staging). * **WAGR Syndrome:** Wilms’ tumor, Aniridia, Genitourinary anomalies, and intellectual disability (formerly Retardation). * **Management:** The standard approach involves radical nephrectomy followed by chemotherapy (except in certain SIOP protocols where pre-operative chemo is used).

Q: True about Hirschsprung's disease?

Aganglionic segment is contracted and not dilated.. **Explanation:** Hirschsprung’s Disease (HD) is characterized by the congenital absence of ganglion cells (Auerbach’s and Meissner’s plexuses) in the distal bowel due to the failure of neural crest cell migration. **1. Why Option A is Correct:** In HD, the **aganglionic segment** lacks the inhibitory neurons required for muscle relaxation. Consequently, this segment remains in a state of **tonic contraction**, leading to a functional obstruction. The bowel proximal to this obstruction undergoes compensatory hypertrophy and massive **dilation** (megacolon) as it attempts to push stool through the narrow segment. Thus, the diseased segment is contracted, while the healthy segment is dilated. **2. Why Other Options are Incorrect:** * **Option B:** The most common site of aganglionosis is the **Rectosigmoid region** (80% of cases), not the descending colon. * **Option C:** While a Barium Enema shows a "transition zone," it is not the gold standard. **Rectal Suction Biopsy** (showing absence of ganglion cells and increased acetylcholinesterase staining) is the **diagnostic gold standard**. * **Option D:** Although 90% are diagnosed in infancy, HD can occasionally present in **adults** who have suffered from lifelong refractory constipation. **Clinical Pearls for NEET-PG:** * **Presentation:** Delayed passage of meconium (>48 hours), abdominal distension, and bilious vomiting. * **Physical Exam:** "Blast sign" or "Squirt sign" (explosive release of stool/gas on digital rectal exam). * **Associated Condition:** Strongly associated with **Down Syndrome** (Trisomy 21). * **Radiology:** The "Transition Zone" on Barium Enema is the hallmark. * **Surgery:** Definitive treatment involves "pull-through" procedures (e.g., Duhamel, Soave, or Swenson).

Q: Ramsted's operation is indicated for which of the following conditions?

Congenital pyloric stenosis. **Explanation:** **Ramstedt’s Pyloromyotomy** is the definitive surgical treatment for **Infantile Hypertrophic Pyloric Stenosis (IHPS)**. The procedure involves a longitudinal incision through the hypertrophied circular muscle fibers of the pylorus, down to the submucosa, allowing the mucosa to bulge through and relieving the gastric outlet obstruction. **Analysis of Options:** * **Option D (Correct):** IHPS typically presents in infants aged 3–6 weeks with non-bilious, projectile vomiting and a palpable "olive-shaped" mass in the epigastrium. Ramstedt's operation is the gold standard once electrolyte imbalances (hypochloremic hypokalemic metabolic alkalosis) are corrected. * **Option A:** Duodenal atresia is treated with **Duodenoduodenostomy** (Diamond-shaped anastomosis). It presents with bilious vomiting and the "double-bubble" sign on X-ray. * **Option B:** Volvulus (associated with malrotation) requires **Ladd’s Procedure**, which involves counter-clockwise detorsion, widening the mesenteric base, and appendectomy. * **Option C:** Anorectal malformations are managed via **PSARP (Posterior Sagittal Anorectoplasty)**, also known as the Pena procedure. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolic Abnormality:** Paradoxical aciduria occurs in late stages of IHPS. * **Diagnosis:** Ultrasound is the investigation of choice (Pyloric muscle thickness >4mm or length >14mm). * **Pre-op Management:** IHPS is a **medical emergency, not a surgical one**. The priority is correcting dehydration and alkalosis with 0.45% or 0.9% Normal Saline with Potassium before surgery. * **Sign:** The "String sign" or "Beak sign" is seen on a Barium swallow (though rarely performed now).

Q: What is the most probable diagnosis in a child presenting with a midline swelling?

Thyroglossal cyst. **Explanation:** The most common cause of a midline neck swelling in a child is a **Thyroglossal Cyst**. It is a vestigial remnant of the thyroglossal duct, which fails to obliterate during the descent of the thyroid gland from the foramen caecum to its adult position. A classic clinical hallmark is that the swelling **moves upward on protrusion of the tongue** (due to its attachment to the hyoid bone) and on deglutition. **Analysis of Options:** * **Thyroid Gland (B):** While the thyroid is midline, a goiter or nodule is less common in children compared to congenital cysts. It moves with deglutition but not with tongue protrusion. * **Cystic Hygroma (C):** This is a lymphatic malformation typically found in the **posterior triangle** (lateral neck). It is soft, painless, and brilliantly transilluminant, but rarely midline. * **Dermoid Cyst (D):** This is the second most common midline swelling. However, unlike a thyroglossal cyst, a submental dermoid **does not move with tongue protrusion** because it has no connection to the hyoid bone. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Most commonly found at the level of the **hyoid bone** (60%). * **Surgical Management:** The procedure of choice is **Sistrunk’s Operation**, which involves excision of the cyst, the entire tract, and the **central part of the hyoid bone** to prevent recurrence. * **Ectopic Thyroid:** Always perform an ultrasound before surgery to ensure the cyst is not the patient’s only functioning thyroid tissue.

Q: Snow storm ascites is seen in:

Meconium ileus. **Explanation:** **Meconium ileus** is the correct answer. This condition occurs in neonates (often associated with Cystic Fibrosis) where thick, inspissated meconium obstructs the terminal ileum. If antenatal perforation occurs, meconium escapes into the peritoneal cavity, leading to **meconium peritonitis**. On ultrasonography, the presence of scattered, echogenic flakes of meconium within the ascitic fluid creates a characteristic **"snowstorm" appearance**. Over time, these areas may calcify, appearing as bright linear or clumped echoes on X-ray or USG. **Why other options are incorrect:** * **Hirschsprung's disease:** Presents with distal bowel obstruction due to aganglionosis. While it can lead to enterocolitis or perforation, it does not typically present with the "snowstorm" sonographic pattern characteristic of meconium. * **Ileocaecal tuberculosis:** Characterized by "wet" or "dry" peritonitis. USG usually shows "matted loops" of bowel or a "stellate" appearance of the mesentery, but not a snowstorm pattern. * **Pseudomyxoma Peritonei:** Known for the **"scalloping" of the liver surface** and mucinous ascites. While the fluid is gelatinous, the specific "snowstorm" terminology is classically reserved for meconium peritonitis in pediatric surgery. **High-Yield Clinical Pearls for NEET-PG:** * **Neuhauser’s Sign (Ground glass appearance):** Seen on X-ray in Meconium Ileus due to tiny air bubbles trapped in thick meconium. * **Microcolon:** A common finding on contrast enema in Meconium Ileus due to disuse. * **Cystic Fibrosis:** 90% of infants with meconium ileus have CF; it is the earliest clinical manifestation of the disease. * **Egg-shell calcification:** Often seen on abdominal X-ray in healed meconium peritonitis.

Question 1

What is the best treatment protocol for an enterogenic cyst?

Accepted Answer

Resection with intestine segment

Answer

Enucleation

Answer

Aspiration with marsupialization

Answer

Observation

Question 2

What is the best investigation to diagnose H-type tracheoesophageal fistula?

Accepted Answer

Esophagoscopy

Answer

X-ray

Answer

Tracheobronchoscopy

Answer

CT scan

Question 3

What is the commonest site of metastasis of Wilm's tumour?

Accepted Answer

Lungs

Answer

Bones

Answer

Liver

Answer

Brain

Question 4

True about Hirschsprung's disease?

Accepted Answer

Aganglionic segment is contracted and not dilated.

Answer

Descending colon is the most common site of aganglionosis.

Answer

Barium enema is diagnostic.

Answer

It is seen in infants and children only.

Question 5

Which of the following statements is NOT true about gastroschisis?

Accepted Answer

None of the above

Answer

Results from fibrosis of the sternocleidomastoid muscle

Answer

Lesion is characterized by the deposition of collagen

Answer

Surgical transection of the sternocleidomastoid muscle may be indicated

Question 6

Ramsted's operation is indicated for which of the following conditions?

Accepted Answer

Congenital pyloric stenosis

Answer

Duodenal atresia

Answer

Volvulus of small intestine

Answer

Anorectal malformation

Question 7

What is the most probable diagnosis in a child presenting with a midline swelling?

Accepted Answer

Thyroglossal cyst

Answer

Thyroid gland

Answer

Cystic hygroma

Answer

Dermoid cyst

Question 8

Snow storm ascites is seen in:

Accepted Answer

Meconium ileus

Answer

Hirschsprung's disease

Answer

Ileocaecal tuberculosis

Answer

Pseudomyxoma Peritonei

Question 9

A child presents with recurrent abdominal pain and bilious vomiting. The condition was diagnosed by barium follow-through and treated surgically with mesenteric widening, appendectomy, and division of Ladd's bands. What is the most likely diagnosis?

Accepted Answer

Malrotation with Ladd's procedure

Answer

Recurrent cecal volvulus

Answer

Recurrent appendicitis

Answer

Intestinal stricture due to tuberculosis

Question 10

Which of the following statements is NOT true regarding Bochdalek hernia?

Accepted Answer

Early respiratory distress leading to early diagnosis and treatment are good prognostic signs.

Answer

The stomach and transverse colon are the most common contents to herniate.

Answer

It can be diagnosed prenatally by ultrasound.

Answer

It is common on the left posterior side.

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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