Pediatric Surgery Basics — MCQs

Pediatric Surgery Basics Indian Medical PG Practice Questions and MCQs

Question 101: A 3-year-old child presents with a hydrocele of the hernia sac. What is the recommended management?

A. Herniotomy (Correct Answer)
B. Herniorrhaphy
C. Observation only
D. Operate after 5 years of age

Explanation: ### Explanation **1. Why Herniotomy is the Correct Answer:** In children, the underlying cause of both inguinal hernias and hydroceles is a **patent processus vaginalis (PPV)**. Unlike adults, where inguinal hernias are usually due to a weakness in the posterior wall of the inguinal canal, pediatric hernias are almost exclusively **indirect**. The definitive treatment for a persistent PPV in children is a **Herniotomy**. This involves the high ligation and division of the patent sac at the level of the internal inguinal ring. Since the pathology is a patent tube rather than a muscular defect, simply closing the sac (herniotomy) is sufficient to cure the condition. **2. Why Other Options are Incorrect:** * **Herniorrhaphy (Option B):** This involves repairing or reinforcing the posterior wall of the inguinal canal (e.g., Bassini’s repair). This is unnecessary in children and can damage the vas deferens or the blood supply to the testis. * **Observation only (Option C):** While some simple congenital hydroceles may resolve by age 1–2, a "hydrocele of the hernia sac" implies a symptomatic or persistent communication. By age 3, the likelihood of spontaneous closure is minimal, and there is a risk of bowel incarceration. * **Operate after 5 years (Option D):** There is no clinical basis for waiting until age 5. Once a pediatric hernia is diagnosed, surgery is indicated to prevent complications like strangulation. **3. Clinical Pearls for NEET-PG:** * **Gold Standard:** High ligation of the sac (Herniotomy) is the surgery of choice for pediatric inguinal hernias and communicating hydroceles. * **Timing:** In infants, surgery is performed soon after diagnosis due to the high risk of incarceration (highest in the first year of life). * **Laparoscopy:** Increasingly used to check for a "silent" PPV on the contralateral side. * **Silk Glove Sign:** A high-yield clinical finding where the layers of the empty hernial sac rub against each other, feeling like two layers of silk.

Question 102: A 2-year-old male presents with testicular pain and an enlarged scrotum. Transillumination of the testis through the scrotal sac is performed. Which of the following best describes the signs observed in this patient?

A. Varicocele
B. Rectocele
C. Cystocele
D. Hydrocele (Correct Answer)

Explanation: **Explanation:** The correct answer is **D. Hydrocele**. **Underlying Medical Concept:** A hydrocele is a collection of serous fluid within the *tunica vaginalis* (the serous membrane covering the testis). In pediatric patients, this is most commonly "communicating," caused by a patent *processus vaginalis* that allows peritoneal fluid to enter the scrotum. The hallmark clinical sign of a hydrocele is **transillumination**. Because the fluid is clear and serous, light passes through the scrotal sac, causing it to glow. This distinguishes it from solid masses (like tumors) or blood (hematocele), which do not transilluminate. **Analysis of Incorrect Options:** * **A. Varicocele:** This is a dilation of the pampiniform venous plexus. It typically presents as a "bag of worms" sensation on palpation and does **not** transilluminate because it contains blood. It is rare in children under 10. * **B. Rectocele:** This is a herniation of the rectum into the posterior vaginal wall, seen in pelvic floor disorders, not in the male scrotum. * **C. Cystocele:** This is a herniation of the urinary bladder into the anterior vaginal wall, unrelated to pediatric scrotal pathology. **High-Yield Clinical Pearls for NEET-PG:** * **Pathophysiology:** Most pediatric hydroceles are **communicating** (associated with a patent processus vaginalis). * **Management:** Most congenital hydroceles resolve spontaneously by **1–2 years of age**. Surgery (High Ligation) is indicated if it persists beyond this age or is associated with an inguinal hernia. * **Differential Diagnosis:** In a child with a painful, enlarged scrotum, always rule out **Testicular Torsion** (surgical emergency) and **Incarcerated Inguinal Hernia**. Unlike hydroceles, hernias are usually opaque on transillumination.

Question 103: A 6-year-old boy presents with a palpable abdominal mass in the epigastrium. There is no bile in the vomitus. What is the clinical diagnosis?

A. Duodenal Atresia
B. Choledochal cyst
C. Pyloric stenosis (Correct Answer)
D. Esophageal Atresia

Explanation: **Explanation:** The clinical diagnosis is **Infantile Hypertrophic Pyloric Stenosis (IHPS)**. The hallmark of this condition is gastric outlet obstruction due to hypertrophy of the pyloric sphincter. **Why Pyloric Stenosis is correct:** 1. **Non-bilious vomiting:** Because the obstruction is proximal to the Ampulla of Vater (where bile enters the duodenum), the vomitus never contains bile. 2. **Epigastric Mass:** The hypertrophied pylorus is often palpable as a firm, mobile, "olive-shaped" mass in the epigastrium or right upper quadrant. 3. **Age Factor:** While typically presenting at 3–6 weeks of life, late presentations can occur. (Note: In the context of standard PG exams, non-bilious vomiting + palpable epigastric mass is the classic triad for IHPS). **Why other options are incorrect:** * **Duodenal Atresia:** Characterized by **bilious vomiting** (as most atresias occur distal to the Ampulla of Vater) and the "double bubble" sign on X-ray. It presents within the first 24–48 hours of life. * **Choledochal Cyst:** While it presents with a palpable mass and jaundice, it does not typically cause gastric outlet obstruction or projectile vomiting. * **Esophageal Atresia:** Presents immediately after birth with drooling, choking, and cyanosis during feeding. The obstruction is proximal to the stomach, so no abdominal mass is palpable. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolic Abnormality:** Hypochloremic, hypokalemic metabolic alkalosis with paradoxical aciduria. * **Investigation of Choice:** Ultrasonography (Criteria: Pyloric muscle thickness >4mm or length >14mm). * **Barium Swallow Sign:** "String sign" or "Beak sign." * **Management:** Initial resuscitation with Normal Saline (0.9%), followed by **Ramstedt’s Pyloromyotomy**.

Question 104: A 3-year-old child presents with scrotal swelling since birth. The transillumination test is positive. Which of the following is NOT true?

A. Herniotomy is indicated.
B. A 'bag of worms' sign is present. (Correct Answer)
C. A silk glove sign is present.
D. The condition is likely a hydrocele.

Explanation: **Explanation:** The clinical presentation of a 3-year-old with scrotal swelling since birth and a **positive transillumination test** is diagnostic of a **Congenital Hydrocele**. In children, this is almost always a "communicating" hydrocele caused by a patent processus vaginalis (PPV). **Why Option B is the Correct Answer (NOT true):** The **'bag of worms' sign** is the classic clinical description for a **Varicocele** (dilated pampiniform plexus of veins). Varicoceles typically present in adolescent or adult males, are usually left-sided, do not transilluminate, and feel like a cluster of noodles. They are not associated with congenital hydroceles. **Analysis of Other Options:** * **Option A (True):** The definitive treatment for a persistent congenital hydrocele in a child is **Herniotomy** (high ligation of the patent processus vaginalis). Unlike adults, where a hydrocelectomy (Jaboulay’s procedure) is done via a scrotal approach, pediatric cases require an inguinal approach to close the communication with the peritoneum. * **Option C (True):** The **'Silk Glove Sign'** is a classic physical finding in children with a patent processus vaginalis. It is the sensation of two layers of silk rubbing together when the spermatic cord is palpated at the pubic tubercle. * **Option D (True):** A painless, fluctuant, transilluminating swelling in a toddler is the hallmark of a hydrocele. **NEET-PG High-Yield Pearls:** 1. **Management Timing:** Most congenital hydroceles resolve spontaneously by **1–2 years of age**. Surgery (Herniotomy) is indicated if it persists beyond this age or if a clinical hernia is present. 2. **Anatomy:** The pediatric hydrocele is a **communicating** type; the adult type is usually **non-communicating** (vaginal). 3. **Transillumination:** Positive in hydrocele and meningocele; negative in incarcerated hernia and varicocele.

Question 105: A 4-year-old boy is seen 1 hour after ingesting a lye drain cleaner. No oropharyngeal burns are noted, but the patient's voice is hoarse. Chest x-ray is normal. Which of the following is the most appropriate therapy?

A. Immediate esophagoscopy
B. Parenteral steroids and antibiotics (Correct Answer)
C. Administration of an oral neutralizing agent
D. Induction of vomiting

Explanation: **Explanation:** The ingestion of **lye (a strong alkali)** causes **liquefactive necrosis**, which penetrates deeply into tissues. In this clinical scenario, the presence of **hoarseness** is a critical "red flag" indicating potential laryngeal edema or airway involvement, even in the absence of visible oropharyngeal burns. **Why Option B is Correct:** The primary goal in the acute phase of symptomatic caustic ingestion is to prevent airway compromise and minimize long-term complications like strictures. **Parenteral steroids** are administered to reduce the inflammatory response and laryngeal edema (addressing the hoarseness) and to potentially decrease the incidence of esophageal stricture formation. **Antibiotics** are typically added to prevent secondary infection in the setting of transmural injury and steroid use. **Why other options are incorrect:** * **Option A:** While esophagoscopy is the gold standard for grading the injury, it is usually delayed for **12–24 hours** to allow the full extent of the burn to become visible and to avoid the risk of perforation during the acute, friable phase. * **Option C:** Neutralizing agents (e.g., weak acids for alkali) are **contraindicated**. The chemical reaction is exothermic, producing heat that can cause additional thermal injury to the esophagus. * **Option D:** Induction of vomiting (emesis) is **strictly contraindicated**. It re-exposes the esophagus and oropharynx to the caustic agent, increasing the risk of further injury and aspiration. **High-Yield NEET-PG Pearls:** * **Alkali vs. Acid:** Alkali causes **liquefactive necrosis** (deeper penetration); Acids cause **coagulative necrosis** (eschar formation, which limits depth). * **Stricture Risk:** The most common long-term complication of caustic ingestion is **esophageal stricture**. * **Cancer Risk:** Patients with caustic esophageal injury have a significantly higher risk of developing **Squamous Cell Carcinoma** of the esophagus 20–40 years later. * **Management Rule:** Never induce vomiting, never use neutralizing agents, and never perform a gastric lavage in caustic ingestions.

Question 106: What is the most probable diagnosis in a newborn baby presenting with regurgitation of feeds and continuous drooling of saliva?

A. Esophageal atresia (Correct Answer)
B. Diffuse esophageal spasm
C. Achalasia cardia
D. Zenker's diverticulum

Explanation: **Explanation:** The clinical presentation of a newborn with **continuous drooling of saliva** (excessive salivation) and **regurgitation of the first feed** is the classic triad for **Esophageal Atresia (EA)**. In EA, the esophagus ends in a blind pouch; therefore, the infant cannot swallow saliva, leading to it pooling in the oropharynx and spilling out (drooling). When feeding is attempted, the milk has no passage to the stomach, resulting in immediate regurgitation and potential aspiration. **Analysis of Incorrect Options:** * **Diffuse Esophageal Spasm (DES):** This is a motility disorder characterized by uncoordinated contractions. It typically presents in adults with chest pain and intermittent dysphagia, not as a neonatal emergency. * **Achalasia Cardia:** This involves the failure of the Lower Esophageal Sphincter (LES) to relax. While it causes regurgitation, it is extremely rare in newborns and usually presents later in childhood with progressive dysphagia. * **Zenker’s Diverticulum:** This is a herniation of the mucosa through Killian’s dehiscence. It is a disease of the elderly (typically >60 years) and does not occur in the neonatal period. **NEET-PG High-Yield Pearls:** * **Most Common Type:** Type C (Esophageal Atresia with Distal Tracheoesophageal Fistula) is the most common (85%). * **Initial Diagnostic Step:** Attempting to pass a stiff, radio-opaque **Nasogastric (NG) tube**; it will meet resistance and "coil" in the upper pouch (visible on X-ray). * **Associated Anomalies:** Always screen for **VACTERL** syndrome (Vertebral, Anal, Cardiac, TEF, Renal, and Limb anomalies). * **Antenatal Clue:** Maternal polyhydramnios (due to the fetus's inability to swallow amniotic fluid).

Question 107: At what age does a baby with congenital hypertrophic pyloric stenosis typically show symptoms?

A. At the time of birth
B. During the first week of life
C. Between the 3rd and 4th week of life (Correct Answer)
D. During the second month of life

Explanation: **Explanation:** **Congenital Hypertrophic Pyloric Stenosis (CHPS)** is characterized by hypertrophy and hyperplasia of the muscular layers of the pylorus, leading to a functional gastric outlet obstruction. 1. **Why Option C is Correct:** Although the condition is termed "congenital," the hypertrophy is progressive rather than present at birth. Symptoms typically manifest between **3 to 6 weeks of life** (most commonly during the 3rd or 4th week). It takes this period for the pyloric muscle to thicken sufficiently to cause a near-complete obstruction, resulting in the classic symptom of **non-bilious, projectile vomiting** immediately after feeds. 2. **Why Other Options are Incorrect:** * **Option A & B:** CHPS is almost never symptomatic at birth or in the first week. Vomiting in the first 24–48 hours usually suggests intestinal atresia or malrotation. * **Option D:** While symptoms can occasionally persist or start in the second month, the peak incidence and classic presentation window for board exams is the 3rd to 6th week. **High-Yield Clinical Pearls for NEET-PG:** * **Epidemiology:** Most common in **first-born male** infants; associated with maternal **erythromycin** use. * **Clinical Sign:** A palpable, olive-shaped mass in the epigastrium (best felt after vomiting). * **Metabolic Profile:** **Hypochloremic, hypokalemic, metabolic alkalosis** with paradoxical aciduria (a favorite NEET-PG question). * **Diagnosis:** Ultrasound is the gold standard (Pyloric muscle thickness >4mm or length >14mm). * **Management:** Initial step is fluid resuscitation (Normal Saline); definitive treatment is **Ramstedt’s Pyloromyotomy**.

Question 108: What is the most common cause of colonic obstruction in neonates?

A. Meconium ileus
B. Aganglionic colon (Correct Answer)
C. Ileal atresia
D. Volvulus

Explanation: **Explanation:** The correct answer is **Aganglionic colon**, also known as **Hirschsprung Disease (HD)**. It is characterized by the congenital absence of ganglion cells in the submucosal (Meissner's) and myenteric (Auerbach's) plexuses, starting from the internal anal sphincter and extending proximally. This leads to a functional obstruction because the affected segment cannot relax, resulting in proximal colonic dilatation. It is the most common cause of lower intestinal (colonic) obstruction in neonates, typically presenting with failure to pass meconium within the first 48 hours of life. **Analysis of Incorrect Options:** * **Meconium ileus:** This is the most common cause of **small bowel** obstruction in newborns (often associated with Cystic Fibrosis), where inspissated meconium obstructs the terminal ileum, not the colon. * **Ileal atresia:** This is a common cause of neonatal intestinal obstruction, but it occurs in the **small intestine**. It results from an in-utero vascular accident. * **Volvulus:** While Midgut Volvulus (due to malrotation) is a surgical emergency, it primarily affects the small bowel and is less common than Hirschsprung disease as an initial cause of colonic obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Rectal Suction Biopsy (shows absence of ganglion cells and hypertrophied nerve bundles). * **Radiology:** Barium enema shows a "transition zone" (narrow distal segment and dilated proximal segment). * **Associated Condition:** Down Syndrome (Trisomy 21) is seen in approximately 10% of cases. * **Initial Sign:** Delayed passage of meconium (>24-48 hours) and a "blast sign" (explosive release of gas/stool) on digital rectal examination.

Question 109: A neonate presents with a history of failure to pass meconium. Examination reveals an absent anal opening with a dimple. What is the investigation of choice?

A. X-ray erect posture
B. X-ray supine posture
C. Gastrograffin study
D. Invertogram (Correct Answer)

Explanation: **Explanation:** The clinical presentation of failure to pass meconium and an absent anal opening is diagnostic of **Anorectal Malformation (ARM)**. **Why Invertogram is the Correct Answer:** The **Invertogram (Wangensteen and Rice technique)** is the traditional investigation of choice to determine the level of the lesion (High, Intermediate, or Low). The procedure involves holding the neonate upside down for 3–5 minutes to allow bowel gas to rise and outline 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 surgeons decide the surgical approach: * **Low lesions:** Managed with a primary Anoplasty. * **High lesions:** Managed with a staged procedure (Colostomy followed by PSARP). **Why other options are incorrect:** * **X-ray erect/supine posture:** These may show dilated bowel loops or air-fluid levels (suggesting obstruction) but cannot accurately determine the distance between the rectal pouch and the perineal skin, which is crucial for classification. * **Gastrograffin study:** This is a contrast study typically used for Meconium Ileus or Hirschsprung disease. In ARM, there is no anal opening to instill contrast retrograde, and antegrade contrast is rarely indicated initially. **High-Yield Clinical Pearls for NEET-PG:** 1. **Timing:** An Invertogram should only be performed **after 18–24 hours of life**. Before this, bowel gas may not have reached the distal rectum, leading to a false diagnosis of a "high" lesion. 2. **Modern Alternative:** In many centers, **Prone Cross-table Lateral X-ray** has replaced the invertogram as it is less stressful for the neonate and provides similar information. 3. **VACTERL Association:** Always screen neonates with ARM for other anomalies (Vertebral, Anal, Cardiac, Tracheo-Esophageal, Renal, and Limb). 4. **Initial Management:** If the lesion is high or the baby is unstable, the first step is a **diverting colostomy**.

Question 110: What is the most likely diagnosis in a 26-day-old infant presenting with recurrent non-bilious vomiting, constipation, and weight loss?

A. Esophageal atresia
B. Choledochal cyst
C. Ileal atresia
D. Pyloric stenosis (Correct Answer)

Explanation: **Explanation:** The clinical presentation of a **26-day-old infant** with **non-bilious vomiting** and weight loss is a classic description of **Infantile Hypertrophic Pyloric Stenosis (IHPS)**. **Why Pyloric Stenosis is Correct:** IHPS typically manifests between **3 to 6 weeks of life**. The underlying pathology is hypertrophy of the pyloric sphincter muscle, leading to gastric outlet obstruction. Because the obstruction is proximal to the Ampulla of Vater (where bile enters the duodenum), the vomitus is characteristically **non-bilious** and often **projectile**. Chronic vomiting leads to dehydration, weight loss, and constipation due to lack of nutrient passage. **Why Other Options are Incorrect:** * **Esophageal Atresia:** Usually presents in the **first hours of life** with excessive salivation, drooling, and choking during the first feed, not at 26 days. * **Choledochal Cyst:** Typically presents with a triad of jaundice, abdominal pain, and a palpable mass. It does not cause gastric outlet obstruction or projectile vomiting. * **Ileal Atresia:** This is a distal bowel obstruction. It presents within the **first 24–48 hours** of life with **bilious vomiting** and significant abdominal distension. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolic Profile:** Classic finding is **Hypochloremic, Hypokalemic, Metabolic Alkalosis** with paradoxical aciduria. * **Physical Exam:** A palpable, **olive-shaped mass** in the epigastrium and visible gastric peristalsis. * **Diagnosis:** Ultrasound is the investigation of choice (Pyloric muscle thickness **>4mm** or length **>14mm**). * **Management:** Initial step is fluid resuscitation (Normal Saline); definitive treatment is **Ramstedt’s Pyloromyotomy**.

Practice by Chapter

Surgical Conditions of the Newborn

Practice Questions

Congenital Diaphragmatic Hernia

Practice Questions

Esophageal Atresia and Tracheoesophageal Fistula

Practice Questions

Intestinal Atresia and Stenosis

Practice Questions

Malrotation and Volvulus

Practice Questions

Hirschsprung's Disease

Practice Questions

Anorectal Malformations

Practice Questions

Biliary Atresia

Practice Questions

Abdominal Wall Defects

Practice Questions

Inguinal Hernia and Hydrocele

Practice Questions

Intussusception

Practice Questions

Appendicitis in Children

Practice Questions

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