Pediatric Surgery — MCQs

Pediatric Surgery Indian Medical PG Practice Questions and MCQs

Question 301: In Kernahan's striped 'Y' classification, what is the main reference point?

A. Incisive foramen (Correct Answer)
B. Soft palate
C. Hard palate
D. Third molar

Explanation: ***Incisive foramen*** - The **incisive foramen** is the central point in the Kernahan's striped 'Y' classification for cleft lip and palate. - This classification system uses the **incisive foramen** as a boundary to distinguish between primary and secondary palatal defects. *Soft palate* - While the **soft palate** can be affected in cleft conditions, it is not the main reference point for the Kernahan's striped 'Y' classification. - Defects of the **soft palate** are part of the secondary palate, but the classification's division hinges on the incisive foramen. *Hard palate* - The **hard palate** is divided into primary and secondary parts by the incisive foramen, making the foramen the key anatomical landmark in this classification. - Defects in the **hard palate** can occur, but the classification system doesn't use the entire hard palate as its primary reference. *Third molar* - The **third molar** is irrelevant to the Kernahan's striped 'Y' classification of cleft lip and palate. - This classification focuses on midfacial structures and palatal development, not on tooth development or position.

Question 302: At what age is surgical treatment for congenital hydrocele recommended if it fails to resolve?

A. 3 years
B. 4 years
C. 1 year
D. 2 years (Correct Answer)

Explanation: ***2 years*** - Congenital hydroceles often resolve spontaneously by the age of **1 year**. - If a congenital hydrocele persists beyond **2 years of age**, surgical repair is typically recommended to prevent complications and address the patent processus vaginalis. *1 year* - While many congenital hydroceles resolve spontaneously by **1 year of age**, surgical intervention is not immediately recommended at this point if it persists. - Waiting until age 2 allows for further opportunity for spontaneous resolution before considering surgery. *3 years* - Waiting until **3 years of age** to intervene for a persistent hydrocele is generally considered too late. - This delay can increase the risk of complications such as **inguinal hernia** or discomfort. *4 years* - Surgical treatment for a congenital hydrocele should be performed well before **4 years of age** if it has not resolved spontaneously. - Prolonged persistence increases the likelihood of discomfort, cosmetic concerns, and potential for associated **inguinal hernia**.

Question 303: What is the most common cause of isolated congenital heart block in infants?

A. Maternal autoantibodies (neonatal lupus) (Correct Answer)
B. Viral myocarditis
C. Rheumatic fever
D. Surgery for congenital heart disease

Explanation: ***Maternal autoantibodies (neonatal lupus)*** - **Maternal autoantibodies**, specifically **anti-Ro/SSA** and **anti-La/SSB**, cross the placenta and target the fetal cardiac conduction system, leading to **congenital heart block**. - This is the most common cause of **isolated complete heart block** in infants, often occurring in the absence of other structural congenital heart defects. *Viral myocarditis* - While viral myocarditis can cause **heart block** due to inflammation of the myocardium and conduction system, it is a less common cause of **congenital heart block** and typically presents with other signs of heart failure. - It usually occurs at any age, including infancy, but is not considered the most common cause of congenital heart block, especially when isolated. *Rheumatic fever* - **Rheumatic fever** is an inflammatory disease that can affect the heart, joints, brain, and skin, and typically follows an infection with Group A Streptococcus. - It is **extremely rare** in infants and primarily affects older children and young adults, making it an unlikely cause of heart block in this population. *Surgery for congenital heart disease* - **Surgical repair** of congenital heart defects can result in **iatrogenic heart block** due to damage to the conduction system during the procedure. - However, this is a **post-surgical complication** and not an intrinsic cause of congenital heart block at birth, as implied by the question regarding heart block "in infants with congenital heart disease" before surgical intervention.

Question 304: At what age is cleft palate ideally repaired?

A. At 5 months of age
B. At 1 year of age (Correct Answer)
C. Before school age
D. At 6 to 8 years of age

Explanation: ***At 1 year of age*** - Repair at this age allows for adequate palatal growth while minimizing interference with **speech development**. - Performing the surgery around 12 months provides a balance between avoiding early anesthetic risks and preventing significant **speech pathology**. *At 5 months of age* - Repair at this early age carries a higher risk of **anesthetic complications** and may interfere with future **midfacial growth**. - It also provides less time for the infant to gain weight and for the tissues to strengthen, increasing the risk of **dehiscence**. *Before school age* - While it's important to repair before school to avoid social and psychological issues, waiting this long can lead to significant and potentially **irreversible speech articulation problems**. - Corrective speech therapy may be more challenging and less effective if primary repair is delayed beyond the critical period for speech development. *At 6 to 8 years of age* - This age is far too late for initial cleft palate repair, as significant **speech deficits** and compensatory articulation patterns would have already developed. - Delaying repair until this age would necessitate extensive and often less successful **speech therapy** and potentially multiple corrective surgeries.

Question 305: A 6-year-old boy experienced life-threatening shock. His CT scan showed a large amount of ascites, bowel wall thickening, and poor or absent enhancement of the strangulated bowel segment, showing gangrenous bowel on surgical exploration. Which of the following statements about anastomosis is true?

A. should be done with catgut
B. should be done by single layer taking submucosa (Correct Answer)
C. should be done by continuous layers as it takes less time
D. should be done by single layer seromuscular Lembert sutures

Explanation: ***should be done by single layer taking submucosa*** - **Single-layer anastomosis including the submucosa** is the preferred technique in modern bowel surgery, including in compromised bowel after resection of gangrenous segments. - The **submucosa is the strongest layer** of the bowel wall, providing the greatest tensile strength and holding power for sutures. Including it is **essential** for a secure, leak-resistant anastomosis. - Single-layer technique reduces operative time, minimizes tissue handling, and has comparable or better outcomes than two-layer techniques in terms of **anastomotic leak rates** and stricture formation. - Either interrupted or continuous sutures can be used, with non-absorbable or slowly absorbable synthetic sutures (e.g., polyglactin, polydioxanone). *should be done by single layer seromuscular Lembert sutures* - **Lembert sutures** are **seromuscular inverting sutures** that deliberately **exclude the submucosa** and mucosa. They were traditionally used as the outer layer in two-layer anastomoses. - Without incorporating the **submucosa** (the strongest layer), Lembert sutures alone do not provide adequate tensile strength for a secure anastomosis, especially in compromised bowel. - Modern evidence favors single-layer techniques that **include the submucosa**, not purely seromuscular sutures. *should be done with catgut* - **Catgut** is an obsolete suture material that has been largely replaced by synthetic absorbable sutures (polyglactin, polydioxanone). - Catgut has unpredictable absorption rates, higher tissue reactivity, and inferior tensile strength retention compared to modern synthetic sutures. - In compromised bowel, reliable suture strength during the critical healing period (7-10 days) is essential to prevent **anastomotic dehiscence**. *should be done by continuous layers as it takes less time* - **Two-layer anastomosis** techniques are outdated and have been shown to have no advantage over single-layer techniques. - Multiple layers increase operative time, cause more tissue trauma, may compromise blood supply, and can lead to luminal narrowing. - While continuous suturing can be faster than interrupted sutures, the key issue here is "continuous **layers**" (plural), which implies a multi-layer technique that is no longer recommended.

Question 306: An abdominal mass is best demonstrated in congenital hypertrophic pyloric stenosis by:

A. During feeding (Correct Answer)
B. In the left hypochondrium
C. In the right iliac fossa
D. Palpation over the epigastrium

Explanation: ***During feeding*** - The **pyloric mass** becomes more prominent and easier to palpate when the infant is **feeding** or immediately after, due to **gastric distension** that pushes the mass anteriorly and **abdominal wall relaxation**. - This is often described as feeling like an **olive-sized mass** in the right upper quadrant or epigastrium. - **"During feeding"** describes the **optimal timing/conditions** for demonstrating the mass, which is what makes it the **best** method. *Palpation over the epigastrium* - While the **epigastrium** is anatomically the **correct location** to palpate for the pyloric mass, this option only describes **WHERE** to palpate, not **WHEN** or under what **optimal conditions**. - The question asks for how the mass is **best demonstrated** - this requires not just correct location, but optimal timing and conditions, which is provided by "during feeding." - Without the optimal conditions (feeding time, gastric distension, infant relaxation), palpation over the epigastrium may miss the mass or find it inconsistently. *In the left hypochondrium* - The **pyloric mass** is located in the **right upper quadrant** or epigastrium, not in the left hypochondrium. - Palpation in the left hypochondrium would be anatomically incorrect for identifying the pyloric stenosis mass. *In the right iliac fossa* - The **right iliac fossa** is located in the lower right abdomen, far from the location of the **pylorus**. - No mass related to congenital hypertrophic pyloric stenosis would be found or best demonstrated in this region.

Question 307: Which of the following statements is true regarding cystic hygroma?

A. Non transilluminant
B. Develops from jugular lymphatic sequestration (Correct Answer)
C. Lined by endothelial cells
D. All of the options

Explanation: ***Develops from jugular lymphatic sequestration*** - **Cystic hygromas** are congenital **lymphatic malformations** that primarily occur in the neck - They arise from the abnormal budding or sequestration of the **jugular lymph sacs** during embryonic development, leading to the formation of dilated lymphatic channels that fail to connect with the venous system - This is the **most specific and characteristic** feature of cystic hygroma pathogenesis *Non transilluminant* - This statement is **incorrect**; cystic hygromas are typically **transilluminant** because they are fluid-filled sacs - The cystic nature of the lesion allows light to pass through, which is a classic diagnostic feature on clinical examination *Lined by endothelial cells* - While this statement is technically true (lymphatic endothelial cells are a type of endothelial cell), it is **not the most specific answer** - This feature is shared with all vascular and lymphatic structures, making it less distinctive for cystic hygromas - The key distinguishing feature is their **embryological origin** from jugular lymphatic sequestration, not just their endothelial lining *All of the options* - This option is **incorrect** because not all statements are true or most appropriate - Only the statement about jugular lymphatic sequestration represents the most specific and correct answer

Question 308: Which of the following statements about Hirschsprung disease is incorrect?

A. The non-peristaltic affected segment is dilated (Correct Answer)
B. Absence of ganglion cells in the involved segment
C. Mainly presents in infancy
D. Swenson, Duhamel, and Soave are surgical procedures for this condition

Explanation: ***The non-peristaltic affected segment is dilated*** - In Hirschsprung disease, the **aganglionic segment** is typically **constricted** and **narrow**, not dilated, due to continuous contraction without relaxation. - The healthy colon proximal to the affected segment becomes dilated due to the obstruction caused by the constricted, aganglionic segment. *Absence of Ganglion cells in the involved segment* - This statement is **correct**. Hirschsprung disease is fundamentally characterized by the **absence of intramural ganglion cells** (Meissner and Auerbach plexuses) in a segment of the distal colon. - This aganglionosis results in a failure of relaxation and normal peristalsis in the affected bowel segment. *Swenson, Duhamel, and Soave are surgical procedures for this condition* - This statement is **correct**. These are the classic and most common **pull-through surgical procedures** used to treat Hirschsprung disease. - They involve resecting the aganglionic segment and pulling the normal, ganglionated bowel down to the anus. *Mainly presents in infancy* - This statement is **correct**. Hirschsprung disease is primarily a **congenital condition** and is typically diagnosed in newborns and infants. - Common presenting symptoms include **failure to pass meconium** within the first 24-48 hours of life, abdominal distension, and bilious vomiting.

Question 309: Surgery for undescended testis is recommended at what age?

A. 36 months
B. 12 months (Correct Answer)
C. 24 months
D. 6 months

Explanation: ***12 months*** - **Orchiopexy** for undescended testes is generally recommended around **12 months of age** to optimize fertility and reduce cancer risk. - This timing is within the ideal surgical window of **6-18 months**, balancing the allowance for potential spontaneous descent (which rarely occurs after 6 months) with minimizing germ cell damage. - Most pediatric surgeons prefer operating around **12 months** as it provides optimal outcomes. *6 months* - While **6 months is within the acceptable surgical window** (6-18 months), most surgeons prefer waiting closer to 12 months. - Operating at 6 months is not incorrect, but waiting a few more months allows for logistical planning and ensures any late spontaneous descent has occurred. - The key is to operate **before 18 months** to preserve fertility potential. *24 months* - Delaying surgery until 24 months (2 years) **exceeds the recommended window** and increases the risk of germ cell damage and potential future infertility. - While still beneficial compared to no surgery, the ideal timing for preserving fertility and minimizing malignancy risk has passed. *36 months* - Surgery at 36 months (3 years) is considered a **significant delay** and carries higher risks for long-term complications, including reduced fertility potential and increased risk of testicular cancer. - The benefits of early intervention are largely diminished by this age, though orchiopexy is still indicated to reduce cancer risk and for cosmetic/psychological reasons.

Question 310: What is the preferred method for removing a foreign body from the lung in children?

A. Rigid bronchoscopy (Correct Answer)
B. Chest x-ray
C. Flexible endoscopy
D. Direct laryngoscopy

Explanation: ***Rigid bronchoscopy*** - **Rigid bronchoscopy** is the preferred method for removing foreign bodies from the lung in children due to its ability to provide better air control, magnified viewing, and larger working channels for robust grasping tools. - It allows for complete ventilation control and isolation of the airway, which is crucial in children where airway obstruction can rapidly lead to respiratory compromise. *Chest x-ray* - A **chest x-ray** is a diagnostic tool used to identify the presence and location of a foreign body, but it is not a method for removal. - Many foreign bodies, especially non-radiopaque ones like food, may not be visible on an x-ray, making it unreliable for definitive diagnosis of presence or absence. *Flexible endoscopy* - While **flexible bronchoscopy** can be used for foreign body removal in some adults or specific situations, it is generally less effective and carries higher risks in children, especially for larger or lodged objects. - Its smaller working channels and less stable airway control make it less suitable for urgent and complete removal in the pediatric population. *Direct laryngoscopy* - **Direct laryngoscopy** is used to visualize the larynx and vocal cords, primarily to remove foreign bodies from the upper airway or intubate, but not typically for removal of foreign bodies lodged deep within the main bronchi or lungs. - It does not offer direct access or visualization of the lower bronchial tree where most aspirated foreign bodies in children tend to lodge.

Practice by Chapter

Neonatal Physiology

Practice Questions

Congenital Anomalies Overview

Practice Questions

Neonatal Intestinal Obstruction

Practice Questions

Necrotizing Enterocolitis

Practice Questions

Hirschsprung's Disease

Practice Questions

Anorectal Malformations

Practice Questions

Pediatric Hernias

Practice Questions

Pyloric Stenosis

Practice Questions

Biliary Atresia

Practice Questions

Pediatric Tumors

Practice Questions

Congenital Diaphragmatic Hernia

Practice Questions

Pediatric Trauma

Practice Questions

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