Pediatric Surgery Basics — MCQs

Pediatric Surgery Basics Indian Medical PG Practice Questions and MCQs

Question 81: Regarding neonatal circumcision, which of the following statements is true?

A. It should be performed without anesthesia, as it is hazardous to administer anesthesia.
B. It should be performed without anesthesia, as neonates do not perceive pain like adults.
C. It should be performed under local anesthesia only.
D. General anesthesia should be administered to neonates for circumcision as they perceive pain similarly to adults. (Correct Answer)

Explanation: ### **Explanation** **Correct Answer: D. General anesthesia should be administered to neonates for circumcision as they perceive pain similarly to adults.** **1. Why Option D is Correct:** Modern pediatric surgery and neonatology have debunked the myth that neonates do not feel pain. Research confirms that neonates possess the anatomical and functional requirements for pain perception (nociception) by the late second trimester. In fact, neonates may be **more sensitive** to pain than adults due to an immature descending inhibitory pain pathway. For elective procedures like circumcision, adequate anesthesia—which may include general anesthesia (GA) often combined with regional blocks (like a dorsal penile nerve block)—is mandatory to prevent physiological stress, hemodynamic instability, and long-term behavioral changes. **2. Why Other Options are Incorrect:** * **Options A & B:** These are based on outdated, incorrect beliefs. Performing surgery without anesthesia is considered unethical. Neonates exhibit significant physiological responses to pain, including tachycardia, hypertension, and increased cortisol levels. * **Option C:** While local anesthesia (e.g., dorsal penile nerve block or MMLA cream) is a vital component of pain management, it is often insufficient as a standalone method for the surgical environment in many clinical protocols, or the question implies the necessity of systemic pain control/immobility provided by GA in a formal surgical setting. **3. High-Yield Clinical Pearls for NEET-PG:** * **Pain Perception:** The cortical subplate, necessary for pain perception, is functional by **24 weeks of gestation**. * **Contraindications to Circumcision:** Hypospadias (the prepuce is needed for future chordee correction/urethroplasty), Epispadias, Ambiguous genitalia, and Exstrophy of the bladder. * **Common Local Block:** The **Dorsal Penile Nerve Block (DPNB)** is the most effective local technique, but it must be performed without epinephrine to avoid ischemia of the end-arteries. * **Complications:** The most common acute complication of neonatal circumcision is **hemorrhage**, followed by infection.

Question 82: Which of the following is NOT a component of VACTERL association?

A. Tracheoesophageal fistula
B. Renal agenesis
C. Radial aplasia
D. Aniridia (Correct Answer)

Explanation: **Explanation:** The **VACTERL association** is a non-random co-occurrence of birth defects. It is a diagnosis of exclusion, typically requiring at least **three** of the component anomalies to be present. **Why Aniridia is the correct answer:** **Aniridia** (absence of the iris) is not a component of VACTERL. Instead, it is a hallmark of the **WAGR syndrome** (Wilms tumor, Aniridia, Genitourinary anomalies, and Range of developmental delays), which is caused by a microdeletion on chromosome 11. **Analysis of incorrect options (Components of VACTERL):** * **V – Vertebral anomalies:** Most commonly hemivertebrae or sacral agenesis. * **A – Anal atresia:** Often associated with rectovestibular or rectourethral fistulas. * **C – Cardiac defects:** Ventricular Septal Defect (VSD) is the most common. * **TE – Tracheoesophageal fistula (Option A):** Usually presents with esophageal atresia. * **R – Renal anomalies (Option B):** Includes renal agenesis, dysplasia, or hydronephrosis. * **L – Limb defects (Option C):** Classically **Radial dysplasia** (radial aplasia/hypoplasia) or polydactyly. **High-Yield Clinical Pearls for NEET-PG:** * **Intelligence:** Children with VACTERL association typically have **normal intelligence**, unlike many other chromosomal syndromes. * **Single Umbilical Artery:** This is a common prenatal finding associated with VACTERL. * **Initial Screening:** If VACTERL is suspected, the first step is often a chest X-ray (vertebral/rib issues) and an echocardiogram. * **Differential:** Do not confuse VACTERL with **CHARGE syndrome** (Coloboma, Heart defects, Atresia choanae, Retardation, Genital, and Ear anomalies).

Question 83: When should a DUBITZKY test be performed in a newborn?

A. Immediately
B. After 2 hours
C. After 4 hours
D. After 6 hours (Correct Answer)

Explanation: **Explanation:** The **Dubitzky test** (also known as the invertogram or Wangensteen-Rice technique) is a radiographic procedure used to determine the level of the rectal pouch in cases of **Anorectal Malformations (ARM)**. **1. Why "After 6 hours" is correct:** The primary goal of the test is to allow swallowed air to travel through the gastrointestinal tract and reach the distal-most end of the rectal pouch. In a newborn, it takes approximately **6 to 12 hours** for air to reach the rectum. If the test is performed too early, the absence of air in the distal rectum may be misinterpreted as a "high" anomaly, leading to an incorrect surgical approach. Waiting until 6–12 hours ensures that the air-fluid interface accurately represents the true anatomical level of the blind pouch. **2. Why other options are incorrect:** * **Immediately / After 2 hours:** At this stage, air is typically still in the stomach or proximal small bowel. Performing the test now would result in a false-positive diagnosis of a high lesion. * **After 4 hours:** While air may have reached the colon, it often hasn't reached the distal rectal cul-de-sac consistently enough to provide a reliable measurement. **Clinical Pearls for NEET-PG:** * **Positioning:** The infant is held in an **inverted position** (head down) for 3–5 minutes before the X-ray so that air rises to the highest point (the rectal pouch). * **Landmark:** A radio-opaque marker (coin) is placed on the anal dimple. The distance between the air bubble and the marker determines if the lesion is **High, Intermediate, or Low**. * **Modern Alternative:** Today, **Cross-table Prone Lateral Radiography** (performed at 12–24 hours) is often preferred over the invertogram to avoid respiratory distress and because it is more comfortable for the neonate. * **Key Line:** The **PC line** (Pubococcygeal line) and **M-line** are used on these films to classify the level of the anomaly.

Question 84: What is the probable diagnosis for a cyst in a child that is located at and associated with vertebral defects?

A. Myelocele
B. Bronchogenic cyst
C. Neuroenteric cyst (Correct Answer)
D. Neuroblastoma

Explanation: ### Explanation **Correct Answer: C. Neuroenteric Cyst** **1. Why it is correct:** A **neuroenteric cyst** (also known as a gastrocystoma) is a rare congenital anomaly resulting from the failure of the **notochord** to separate from the **foregut** during the 3rd week of embryogenesis. This persistent connection creates a tract between the spinal canal and the gastrointestinal tract. * **Key Diagnostic Triad:** A posterior mediastinal mass (cyst), associated **vertebral anomalies** (such as hemivertebrae, butterfly vertebrae, or scoliosis), and occasionally intraspinal extensions. The presence of vertebral defects is the hallmark that distinguishes it from other mediastinal cysts. **2. Why other options are incorrect:** * **A. Myelocele:** This is a form of spina bifida aperta where the neural plate is exposed. While it involves vertebral defects, it is a defect of the neural tube closure, not a discrete internal cyst associated with the gut. * **B. Bronchogenic cyst:** These are the most common foregut cysts, usually located in the middle mediastinum. While they are cystic, they are **not** typically associated with vertebral anomalies. * **D. Neuroblastoma:** This is a solid tumor (not a cyst) arising from neural crest cells. While it can cause vertebral erosion or "dumbbell" extension into the spinal canal, it does not typically present as a congenital cyst associated with primary vertebral malformations. **3. High-Yield Pearls for NEET-PG:** * **Location:** Most commonly found in the **posterior mediastinum**. * **Lining:** These cysts are lined by ectopic gastrointestinal or respiratory epithelium. * **Presentation:** May present with respiratory distress (compression) or meningitis (if a fistula exists). * **Imaging:** X-ray showing "butterfly vertebrae" or "hemivertebrae" in a child with a mediastinal mass is a classic "spotter" for Neuroenteric cyst.

Question 85: In a 2-year-old child, what is the most likely diagnosis for a bluish, dome-shaped swelling on the inner side of the lip?

A. Hematoma
B. Mucocele (Correct Answer)
C. Hemangioma
D. None of the above

Explanation: ### Explanation **Correct Answer: B. Mucocele** **1. Why it is correct:** A **mucocele** (mucous extravasation cyst) is the most common benign minor salivary gland lesion in children. It typically occurs due to mechanical trauma (like accidental biting) that causes the rupture of a salivary gland duct, leading to the leakage and accumulation of mucus into the surrounding submucosal tissue. * **Clinical Presentation:** It characteristically presents as a **painless, bluish, dome-shaped, fluctuant swelling**. * **Location:** The **lower lip** (inner aspect) is the most common site because it is most prone to trauma. The bluish hue is due to the **Tyndall effect** (light scattering through the translucent fluid). **2. Why the other options are incorrect:** * **A. Hematoma:** While a hematoma is associated with trauma, it usually appears dark red or purple immediately after injury and is often tender. It does not typically present as a persistent, dome-shaped translucent cyst. * **C. Hemangioma:** These are vascular malformations. While they can be bluish-red, they usually demonstrate **pulsatility** or **blanching** upon pressure (diascopy test), which a mucocele does not. Hemangiomas are often present from birth or early infancy and have a different growth pattern. **3. NEET-PG High-Yield Pearls:** * **Ranula:** A mucocele specifically located on the **floor of the mouth** (arising from the sublingual gland). If it extends below the mylohyoid muscle into the neck, it is called a **Plunging Ranula**. * **Treatment:** The gold standard is **surgical excision** of the cyst along with the associated minor salivary gland to prevent recurrence. * **Most common site:** Lower lip (Mucocele); Floor of mouth (Ranula).

Question 86: An olive-shaped mass on palpation during feeding is pathognomonic of which condition?

A. Hypertrophic pyloric stenosis (Correct Answer)
B. Duodenal atresia
C. Jejunal atresia
D. Ileal stenosis

Explanation: ### Explanation **Correct Answer: A. Hypertrophic Pyloric Stenosis (HPS)** **Why it is correct:** Hypertrophic Pyloric Stenosis is characterized by the hypertrophy and hyperplasia of the muscular layers of the pylorus, leading to gastric outlet obstruction. The "olive-shaped mass" (pyloric tumor) represents the thickened pyloric muscle. It is best palpated in the right epigastrium or right upper quadrant, especially during or immediately after feeding when the abdominal muscles are relaxed. This finding, combined with visible gastric peristalsis (left to right) and non-bilious projectile vomiting in an infant (typically 3–6 weeks old), is pathognomonic for HPS. **Why the other options are incorrect:** * **B. Duodenal Atresia:** Presents with bilious vomiting within the first 24–48 hours of life. The classic radiographic finding is the "double bubble" sign. It is not associated with a palpable abdominal mass. * **C & D. Jejunal/Ileal Atresia/Stenosis:** These are causes of lower intestinal obstruction. They present with bilious vomiting and abdominal distension. While loops of bowel may be visible, a localized, firm, olive-shaped mass is absent. **NEET-PG High-Yield Pearls:** * **Metabolic Abnormality:** Hypochloremic, hypokalemic metabolic alkalosis with paradoxical aciduria (crucial for exams). * **Diagnosis:** Ultrasound is the gold standard (Pyloric muscle thickness >4mm, length >14-16mm). * **Barium Swallow:** Shows the "String sign," "Beak sign," or "Shoulder sign." * **Management:** Initial stabilization of electrolytes followed by **Ramstedt’s Pyloromyotomy**. * **Epidemiology:** Most common in first-born male infants.

Question 87: A newborn is found to have a defect in the central abdomen at birth. Which of the following features is NOT suggestive of Omphalocele as a diagnosis?

A. The defect is open (Correct Answer)
B. Associated with trisomy 13
C. Associated with other congenital anomalies
D. Umbilical cord is at the apex of the membrane

Explanation: ### **Explanation** The correct answer is **A. The defect is open.** **1. Why Option A is the correct answer:** An **Omphalocele** is a midline abdominal wall defect where the herniated viscera are **covered by a sac** consisting of an inner layer of peritoneum and an outer layer of amnion. Therefore, the defect is **not open**. In contrast, **Gastroschisis** is characterized by an open defect (usually to the right of the umbilical cord) where the bowel is exposed directly to the amniotic fluid without any protective membrane. **2. Analysis of Incorrect Options:** * **Option B (Associated with trisomy 13):** This is a true feature of Omphalocele. Approximately 30-50% of cases are associated with chromosomal abnormalities, most commonly Trisomy 13, 18, and 21. * **Option C (Associated with other congenital anomalies):** This is true. Omphalocele is frequently associated with other structural defects, including cardiac anomalies (most common), neural tube defects, and syndromes like **Beckwith-Wiedemann Syndrome**. * **Option D (Umbilical cord is at the apex):** This is a hallmark diagnostic feature. In Omphalocele, the umbilical cord inserts directly into the apex of the sac, whereas in Gastroschisis, the cord inserts normally into the abdominal wall. ### **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Omphalocele is **midline** (through the umbilical ring); Gastroschisis is **para-umbilical** (usually right-sided). * **Sac:** Omphalocele = **Sac present**; Gastroschisis = **No sac** (leads to thickened, matted bowel loops due to chemical peritonitis). * **Beckwith-Wiedemann Syndrome:** Characterized by Omphalocele, Macroglossia, and Gigantism (monitor for hypoglycemia). * **Pentalogy of Cantrell:** Includes Omphalocele, diaphragmatic hernia, sternal cleft, pericardial defect, and intracardiac defects (Ectopia cordis).

Question 88: A six-year-old boy presents to the emergency department with a painful limp. Clinical examination reveals tenderness in the femoral triangle and some limitation of hip movements. An X-ray was done which was normal. Which of the following should be the next course of action?

A. Wait and Watch/Observation (Correct Answer)
B. Ultrasonography
C. Aspiration
D. MRI Scan

Explanation: ### Explanation The clinical presentation of a 6-year-old with a painful limp, tenderness in the femoral triangle, and limited hip motion—coupled with a **normal X-ray**—is classic for **Transient Synovitis (Toxic Synovitis)**. This is the most common cause of acute hip pain in children aged 3–10 years. **1. Why "Wait and Watch" is correct:** Transient synovitis is a self-limiting, non-specific inflammatory condition, often following a viral upper respiratory tract infection. Since the child is hemodynamically stable and the X-ray is normal (ruling out Perthes disease or fractures), the standard management is **conservative**, involving bed rest and NSAIDs. Most cases resolve spontaneously within 7–10 days. **2. Why other options are incorrect:** * **Ultrasonography:** While USG is sensitive for detecting joint effusion, it cannot reliably differentiate between sterile transient synovitis and septic arthritis. It is indicated only if the child is febrile or the diagnosis is in doubt. * **Aspiration:** This is an invasive procedure reserved for suspected **Septic Arthritis**. In this scenario, the absence of systemic symptoms (fever, high inflammatory markers) makes aspiration unnecessary. * **MRI Scan:** This is highly sensitive but expensive and usually unnecessary for the initial management of a suspected transient synovitis. It is reserved for chronic cases or suspected early osteomyelitis. **Clinical Pearls for NEET-PG:** * **Kocher’s Criteria:** Used to differentiate Septic Arthritis from Transient Synovitis. It includes: (1) Non-weight bearing, (2) ESR >40 mm/hr, (3) Fever >38.5°C, (4) WBC >12,000/mm³. * **Age Group:** Transient Synovitis (3–10 yrs) vs. Perthes Disease (4–8 yrs) vs. SCFE (Obese adolescents, 10–15 yrs). * **First-line Investigation:** X-ray is always the first step to rule out bony pathology. If X-ray is normal and the child is afebrile, **observation** is the next step.

Question 89: A neonate is found to have an imperforate anus. You recommend studies to search for other anomalies because infants with anorectal anomalies tend to have other congenital anomalies. What associated abnormalities are commonly seen with imperforate anus?

A. Abnormalities of the cervical spine
B. Hydrocephalus
C. Duodenal atresia
D. Cardiac disease (Correct Answer)

Explanation: **Explanation:** Anorectal malformations (ARMs), such as imperforate anus, are frequently associated with other congenital anomalies in approximately 50–60% of cases. The most common framework for these associations is the **VACTERL association**. **1. Why Cardiac disease is correct:** Congenital Heart Disease (CHD) is one of the most frequent systemic associations in infants with imperforate anus, occurring in about **30–35%** of patients. Common defects include Ventricular Septal Defects (VSD), Atrial Septal Defects (ASD), and Tetralogy of Fallot. Because of this high prevalence, an echocardiogram is a mandatory screening tool in the initial evaluation of any neonate with an ARM. **2. Why the other options are incorrect:** * **Abnormalities of the cervical spine:** While vertebral anomalies are part of VACTERL, they most commonly involve the **lumbar and sacral spine** (e.g., hemivertebrae, sacral agenesis). Cervical spine involvement is rare. * **Hydrocephalus:** This is not a classic component of the VACTERL association. Central nervous system anomalies are generally less common than urogenital or cardiac ones in ARM patients. * **Duodenal atresia:** While GI anomalies occur, **Esophageal Atresia with Tracheoesophageal Fistula (TEF)** is the specific GI association defined in VACTERL. Duodenal atresia is more classically associated with Down Syndrome. **High-Yield Clinical Pearls for NEET-PG:** * **VACTERL mnemonic:** **V**ertebral, **A**nal atresia, **C**ardiac, **T**racheo-**E**sophageal fistula, **R**enal, and **L**imb (Radial dysplasia) anomalies. * **Most common association:** Genitourinary anomalies (40–50%) are the most frequent overall, followed by Vertebral and Cardiac. * **Initial Investigation:** After physical exam, the first steps are a **Cross-table lateral X-ray** (Invertogram) at 18–24 hours of life and screening for VACTERL (Echo, Spinal/Renal Ultrasound).

Question 90: Which of the following is false regarding Bochdalek hernia?

A. Spleen and kidney can herniate through it.
B. It occurs posterolaterally.
C. It always occurs on the right side. (Correct Answer)
D. The hernia may or may not have a sac.

Explanation: **Explanation:** Congenital Diaphragmatic Hernia (CDH) most commonly presents as a **Bochdalek hernia**. The statement that it "always occurs on the right side" is **false**, making it the correct answer. **1. Why Option C is False:** Bochdalek hernias occur due to the failure of the pleuroperitoneal canal to close. This closure occurs later on the left side than the right. Furthermore, the presence of the **liver** on the right side acts as a physical barrier, protecting the right diaphragm. Consequently, **80–85% of Bochdalek hernias occur on the left side**, not the right. **2. Analysis of Other Options:** * **Option A:** Since the defect is large and posterolateral, various abdominal organs can herniate, most commonly the small bowel, but the **spleen, stomach, and even the kidney** are frequently involved. * **Option B:** The anatomical location of a Bochdalek hernia is characteristically **posterolateral** (mnemonic: *Bochdalek is Back and Lateral*). * **Option C:** While most cases (90%) lack a true peritoneal sac (allowing direct contact between viscera and lungs), a **sac may be present** in about 10–15% of cases. **High-Yield Clinical Pearls for NEET-PG:** * **Triad of Presentation:** Scaphoid abdomen, respiratory distress, and dextrocardia (if left-sided). * **Most Important Prognostic Factor:** The degree of **Pulmonary Hypoplasia** and associated Pulmonary Hypertension, rather than the surgery itself. * **Management:** It is a **medical, not surgical, emergency**. Stabilization (gentle ventilation, avoiding bag-mask ventilation) is required before surgical repair. * **Morgagni Hernia:** Contrastingly, this is anterior, retrosternal, and more common on the right side.

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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