Pediatric Surgery — MCQs
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A 3-year-old child presents with congenital diaphragmatic hernia requiring repair. Preoperative echocardiogram shows severe pulmonary hypertension with suprasystemic pressures. The pediatric surgeon recommends immediate repair, while the cardiologist suggests optimizing pulmonary pressures first. Evaluate the optimal timing and approach.
A 16-year-old competitive swimmer presents with recurrent shoulder dislocation. MRI shows a Bankart lesion and significant bone loss. His coach wants him to return to competition quickly, his parents are concerned about long-term function, and the patient wants to continue swimming. Evaluate the management approach that best addresses all stakeholder concerns.
What is the diagnosis based on the image shown?
A patient presents with fecal discharge from the umbilicus. What is the most likely diagnosis?
In the intraoperative image of congenital hernia repair, the structure marked by the red arrow is identified as which of the following?
A child presents to the OPD with the finding shown in the image. When should the first surgical repair be performed?
A 6-month-old child presents with an umbilical hernia measuring 3 cm in diameter. What is the management protocol?
The metabolic derangement in congenital pyloric stenosis is -
All of the following are true about congenital hypertrophic pyloric stenosis except
Investigation of choice for Posterior urethral valves?
Pediatric Surgery Indian Medical PG Practice Questions and MCQs
Question 261: A 3-year-old child presents with congenital diaphragmatic hernia requiring repair. Preoperative echocardiogram shows severe pulmonary hypertension with suprasystemic pressures. The pediatric surgeon recommends immediate repair, while the cardiologist suggests optimizing pulmonary pressures first. Evaluate the optimal timing and approach.
- A. Surgical repair with intraoperative ECMO support
- B. ECMO support with delayed surgical repair
- C. Delay surgery until pulmonary pressures normalize
- D. Medical optimization of pulmonary hypertension then early repair (Correct Answer)
Explanation: ***Medical optimization of pulmonary hypertension then early repair*** - In **congenital diaphragmatic hernia (CDH)** with **severe pulmonary hypertension (PH)**, optimizing pulmonary pressures and hemodynamics before surgical repair significantly improves outcomes - This approach involves **medical management** with pulmonary vasodilators (e.g., inhaled nitric oxide), gentle ventilation strategies, and supportive care to stabilize the infant's condition - Once PH is controlled and the patient is hemodynamically stable, **early surgical closure** is performed - This "stabilize first" approach has improved survival rates compared to emergent repair in unstable patients *Surgical repair with intraoperative ECMO support* - While **ECMO (extracorporeal membrane oxygenation)** can support infants with severe respiratory failure, routine intraoperative ECMO for CDH repair is not standard practice - ECMO is reserved for cases of severe cardiorespiratory failure refractory to conventional management - The goal is to stabilize the patient first, then proceed with repair, rather than operating during active ECMO support *ECMO support with delayed surgical repair* - **ECMO** is a life-saving intervention for severe PH and respiratory failure refractory to conventional treatment in CDH - However, the goal is to stabilize the patient on ECMO and optimize pulmonary function, then proceed with **surgical repair as soon as feasible** - Prolonged ECMO carries significant risks including bleeding, infection, and thrombosis - Surgery should not be delayed indefinitely while on ECMO *Delay surgery until pulmonary pressures normalize* - **Complete normalization of pulmonary pressures** in severe CDH can take weeks or may not occur fully due to underlying pulmonary hypoplasia - Delaying surgery indefinitely while awaiting full normalization prolongs the period of herniated abdominal organs in the chest, which impedes lung growth and function - The presence of herniated contents can worsen pulmonary hypoplasia and perpetuate PH - The goal is stabilization and improvement (not complete normalization) before proceeding with early repair
Question 262: A 16-year-old competitive swimmer presents with recurrent shoulder dislocation. MRI shows a Bankart lesion and significant bone loss. His coach wants him to return to competition quickly, his parents are concerned about long-term function, and the patient wants to continue swimming. Evaluate the management approach that best addresses all stakeholder concerns.
- A. Temporary activity restriction with delayed surgical decision
- B. Conservative management with physical therapy
- C. Open Bankart repair with 4-6 month recovery period
- D. Latarjet procedure for bone loss with extended recovery (Correct Answer)
Explanation: ***Latarjet procedure for bone loss with extended recovery*** - The **Latarjet procedure** addresses both the **Bankart lesion** and significant **bone loss** on the glenoid, which is crucial for preventing future dislocations in a high-risk athlete. - While it requires an **extended recovery** (typically 4-6 months), this approach offers the best long-term stability, satisfying the parents' concern for long-term function and ultimately allowing the patient to return to competitive swimming. - This procedure transfers the coracoid process to the glenoid, providing both a bony buttress and dynamic sling effect from the conjoint tendon. *Temporary activity restriction with delayed surgical decision* - This approach fails to address the underlying **structural instability** and significant bone loss, making future dislocations highly probable, especially in a competitive swimmer. - Delaying surgery prolongs the patient's time away from sport and does not adequately address the goal of a definitive, long-term solution. *Conservative management with physical therapy* - In a young, athletic individual with **recurrent dislocations**, a Bankart lesion, and **significant bone loss**, conservative management is highly unlikely to provide adequate stability to prevent recurrence. - This would not allow the patient to safely return to high-demand activities like competitive swimming. *Open Bankart repair with 4-6 month recovery period* - While an **open Bankart repair** addresses the labral lesion, it does not adequately manage the **significant bone loss**, which is a major risk factor for re-dislocation in this patient population. - The risk of recurrent instability remains high with failure rates of 20-30% in athletes with bone loss, making this a less durable solution for a competitive swimmer.
Question 263: What is the diagnosis based on the image shown?
- A. Ileal diverticulum
- B. Urachal cyst
- C. Umbilical fistula (Correct Answer)
- D. Omphalocele
Explanation: ***Umbilical fistula*** - The image shows a **patent vitelline duct (omphalomesenteric duct)**, which creates a direct connection between the umbilicus and the ileum, visible as an umbilical fistula. - This condition presents with **fecal discharge from the umbilicus** or **umbilical prolapse of intestinal mucosa**. *Ileal diverticulum* - An ileal diverticulum, such as a **Meckel's diverticulum**, is a blind pouch protruding from the ileum, usually not communicating with the umbilicus. - It would typically be noted as an **outpouching of the ileal wall**, without an external opening at the umbilicus unless complicated by rupture. *Urachal cyst* - A urachal cyst is a remnant of the **urachus**, which connects the bladder to the umbilicus during fetal development. - It would be located **between the umbilicus and the bladder** and contain urine or serous fluid, not intestinal contents. *Omphalocele* - An omphalocele is a **congenital abdominal wall defect** where abdominal organs protrude into the base of the umbilical cord. - The defect is **covered by a membrane**, and it involves herniation of abdominal contents, not a fistula with the intestine.
Question 264: A patient presents with fecal discharge from the umbilicus. What is the most likely diagnosis?
- A. Urachal fistula
- B. Patent vitelline duct (Correct Answer)
- C. Omphalocele
- D. Gastroschisis
Explanation: ***Patent vitelline duct*** - **Fecal discharge from the umbilicus** indicates a persistent communication between the **ileum** and the **umbilicus** through a patent vitelline (omphalomesenteric) duct. - This congenital anomaly represents a remnant of the **omphalomesenteric duct** that **completely failed to involute**, creating a **fistulous tract** allowing intestinal contents to exit through the umbilicus. - This is the **most complete form** of vitelline duct persistence (other forms include Meckel's diverticulum, fibrous band, or umbilical polyp). *Urachal fistula* - A urachal fistula occurs when the **urachus** remains patent, creating a connection between the **bladder** and the umbilicus. - While it can result in umbilical discharge, the discharge would be **urine**, not feces. *Omphalocele* - An omphalocele is a **congenital abdominal wall defect** where abdominal contents protrude into a sac at the base of the umbilicus. - It does not involve a fistulous communication with intestines causing fecal discharge, but rather a **herniation** of organs covered by a peritoneal membrane. *Gastroschisis* - Gastroschisis is a congenital anomaly characterized by the **protrusion of abdominal organs** directly into the amniotic cavity **without a covering sac**, usually to the **right of the umbilicus**. - Like omphalocele, it's a **herniation defect** presenting at birth and does not involve an abnormal fistulous connection causing fecal discharge from the umbilicus.
Question 265: In the intraoperative image of congenital hernia repair, the structure marked by the red arrow is identified as which of the following?
- A. Femoral vein
- B. Obturator vein
- C. Testicular vein (Correct Answer)
- D. Inferior epigastric vein
Explanation: ***Testicular vein*** - The **testicular vein** is clearly visible within the **spermatic cord** structures, which are typically identified and often dissected during congenital hernia repair. - Its position coursing with the testicular artery and vas deferens is consistent with its anatomical location within the inguinal canal. *Femoral vein* - The **femoral vein** lies more inferiorly and medially within the femoral canal, distinct from the inguinal canal contents visualized in this image. - Identification of the femoral vein would be in the context of a femoral hernia repair, not typically a congenital (indirect inguinal) hernia. *Obturator vein* - The **obturator vein** is located deep within the pelvis, accompanying the obturator nerve and artery through the obturator foramen. - It is not typically encountered or visible during a standard open or laparoscopic inguinal hernia repair. *Inferior epigastric vein* - The **inferior epigastric vein** runs superiorly and medially, forming the medial border of the **inguinal triangle (Hesselbach's triangle)**. - While it's an important landmark in hernia repair (differentiating direct vs. indirect hernias), its anatomical position and trajectory are distinct from the structure indicated by the arrow, which is part of the spermatic cord.
Question 266: A child presents to the OPD with the finding shown in the image. When should the first surgical repair be performed?
- A. 3 months (Correct Answer)
- B. 6 months
- C. 12 months
- D. 18 months
Explanation: ***3 months*** - Surgical repair of **cleft lip** is typically performed around **3 months of age** based on current practice guidelines. - The traditional **"Rule of 10s"** (10 weeks old, 10 pounds weight, 10 g/dL hemoglobin) has evolved to **3-6 months** as the optimal timing window, with **3 months** being most common. - Early repair helps with **feeding difficulties**, improves cosmesis, and facilitates normal **parent-infant bonding** while optimizing surgical outcomes. *6 months* - While 6 months is within the acceptable range for cleft lip repair, **3 months is preferred** as the optimal timing in most centers. - Delaying repair to 6 months may impact feeding mechanics and parental bonding, though outcomes remain good. - This timing is **earlier** than the recommended window for **cleft palate repair** (9-18 months). *12 months* - **Cleft palate repair** is typically performed around **9-18 months of age**, with 12 months being a common target to optimize speech development. - Performing **cleft lip repair** at 12 months is significantly **delayed** and would miss the benefits of earlier intervention for feeding, cosmesis, and bonding. *18 months* - 18 months is at the **upper limit** for **cleft palate repair** to minimize speech development issues. - This age is **too late** for the first surgical repair of a cleft lip, which should be performed in early infancy (3-6 months).
Question 267: A 6-month-old child presents with an umbilical hernia measuring 3 cm in diameter. What is the management protocol?
- A. Immediate surgical repair
- B. Elective surgery at 5 years of age
- C. Hernioplasty for repair
- D. Observation until 2 years of age, then surgery if unresolved (Correct Answer)
Explanation: ***Observation until 2 years of age, then surgery if unresolved*** - Most **umbilical hernias** in infants and young children **resolve spontaneously** by the age of 2 years, making observation the initial management for uncomplicated cases. - Surgical intervention is typically considered if the hernia persists beyond **2-4 years of age**, is symptomatic, or demonstrates features of incarceration regardless of age. *Immediate surgical repair* - Immediate surgery is reserved for cases with **incarceration** or **strangulation**, which are not indicated by a "symptomatic" hernia in this context. - Given the high rate of spontaneous closure, most umbilical hernias do not require urgent intervention. *Elective surgery at 5 years of age* - Waiting until 5 years of age to consider surgery might delay treatment for some children whose hernias are unlikely to close spontaneously after the age of 2-4 and could lead to prolonged parental anxiety. - The general consensus is to recommend surgery if the hernia persists beyond **2-4 years**, rather than a fixed age of 5. *Hernioplasty for repair* - While hernioplasty is the surgical technique for repair, the question asks about the overall management protocol, which includes initial observation. - Applying this term as an immediate solution for a 6-month-old's uncomplicated umbilical hernia would bypass the recommended period of **conservative management**.
Question 268: The metabolic derangement in congenital pyloric stenosis is -
- A. Hypochloremic alkalosis (Correct Answer)
- B. Hyperchloremic alkalosis
- C. Hyperchloremic acidosis
- D. Hypochloremic acidosis
Explanation: ***Hypochloremic alkalosis*** - **Pyloric stenosis** causes persistent vomiting of stomach contents, leading to the loss of **hydrochloric acid (HCl)** and subsequent **hypochloremia** and **metabolic alkalosis**. - The body's compensatory mechanisms are limited: with volume depletion, the kidneys prioritize sodium retention over acid-base balance, leading to **paradoxical aciduria** (excretion of H+ to retain Na+), which perpetuates the alkalosis. *Hyperchloremic alkalosis* - **Hyperchloremia** is an elevated chloride level, which is not characteristic of pyloric stenosis as profound vomiting leads to significant **chloride loss**. - While alkalosis is present, it is specifically **hypochloremic** due to the loss of gastric acid. *Hyperchloremic acidosis* - **Hyperchloremic acidosis** is often seen in conditions like **renal tubular acidosis** or **diarrhea**, where there is a loss of bicarbonate or retention of chloride, and is not associated with gastric outlet obstruction. - This condition involves a low pH (acidosis) and high chloride, which contradicts the clinical picture of pyloric stenosis characterized by high pH (alkalosis) and low chloride. *Hypochloremic acidosis* - This combination is rare and typically seen in conditions like very severe **diarrhea** with significant fluid and electrolyte loss alongside certain renal dysfunctions. - In pyloric stenosis, the primary acid-base disturbance is **alkalosis** due to the loss of gastric acid, not acidosis.
Question 269: All of the following are true about congenital hypertrophic pyloric stenosis except
- A. Metabolic acidosis occurs (Correct Answer)
- B. More common in males
- C. RamStedt Pyloromyotomy is the treatment of choice
- D. Non Bilious vomiting is seen
Explanation: ***Metabolic acidosis occurs*** - Due to persistent **vomiting** from pyloric stenosis, there is a significant loss of **hydrochloric acid (HCl)** from the stomach. - This loss of gastric acid leads to **hypochloremic metabolic alkalosis** rather than acidosis. *More common in males* - **Pyloric stenosis** has a clear male predominance, with a male-to-female ratio of about 4:1. - This gender disparity is a well-established epidemiological feature of the condition. *RamStedt Pyloromyotomy is the treatment of choice* - The **Ramstedt pyloromyotomy** is the definitive surgical procedure for congenital hypertrophic pyloric stenosis. - This procedure involves incising the hypertrophied muscle of the pylorus while leaving the mucosa intact, thus relieving the obstruction. *Non Bilious vomiting is seen* - The vomiting in pyloric stenosis is typically **non-bilious** because the obstruction is proximal to the **ampulla of Vater**, where bile enters the duodenum. - Vomiting usually occurs forcefully (projectile) after feeding.
Question 270: Investigation of choice for Posterior urethral valves?
- A. Ultrasound
- B. Retrograde urethrography
- C. Micturating Cystourethrography (MCU) (Correct Answer)
- D. Intravenous Pyelography
Explanation: ***Micturating Cystourethrography (MCU)*** - The **Micturating Cystourethrography (MCU)** is the gold standard for diagnosing posterior urethral valves (PUV) as it directly visualizes the posterior urethra during voiding. - It classically shows a **dilated posterior urethra** with a narrow opening at the level of the valves, often accompanied by **vesicoureteral reflux** and bladder wall abnormalities. *Ultrasound* - **Antenatal ultrasound** can suggest PUV by showing bilateral **hydronephrosis**, a dilated bladder, and thick-walled bladder with a "keyhole sign" (dilated posterior urethra). - However, ultrasound alone **cannot definitively diagnose** the valves or rule out other causes of obstruction. *Retrograde urethrography* - **Retrograde urethrography (RGU)** involves injecting contrast against the flow of urine, which can mask the presence of posterior urethral valves, as they are typically obstructive to antegrade flow. - While RGU can highlight urethral strictures and other anterior urethral pathologies, it is **not ideal** for visualizing posterior urethral valves. *Intravenous Pyelography* - **Intravenous Pyelography (IVP)** assesses kidney function and the collecting system, but it provides **limited detailed visualization** of the urethra itself. - While it might show features of obstructive uropathy like **hydronephrosis** or delayed excretion, it cannot directly confirm the presence or location of posterior urethral valves.
Practice by Chapter
Neonatal Physiology
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Congenital Anomalies Overview
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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
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Pyloric Stenosis
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Biliary Atresia
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Pediatric Tumors
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Congenital Diaphragmatic Hernia
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Pediatric Trauma
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