Pediatric Surgery Practice Questions

Q: At what age do symptoms of midgut volvulus most commonly present?

1 week. ***1 week*** - **Midgut volvulus** is a surgical emergency where the intestine twists around the **superior mesenteric artery**, typically due to **intestinal malrotation**. - Approximately **50% of cases present within the first week of life**, making this the most common timeframe for symptom onset. - Classic presentation includes **bilious vomiting** in a neonate, which requires urgent surgical evaluation. - The volvulus causes arterial occlusion leading to **bowel ischemia** and potential necrosis if not promptly treated. *Within 24 hours* - While some cases present within the first 24 hours of life, this represents a subset of cases rather than the typical presentation timeframe. - The teaching emphasizes that 50% present in the **first week**, not specifically the first day. *2-3 days* - This falls within the first week and represents a reasonable timeframe for presentation. - However, when considering the **most typical** presentation period, the first week as a whole is the more accurate teaching point. *2-3 weeks* - While 75% of cases present within the **first month of life**, the peak incidence is earlier. - Presentation at 2-3 weeks is possible but less common than presentation in the first week. - Most standard references emphasize the **first week** as the critical period for presentation.

Q: At what age is cleft palate ideally repaired?

At 1 year of age. ***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.

Q: At what age is orchidopexy for an incompletely descended testis typically performed?

1 year. ***1 year*** - Orchidopexy is typically recommended between **6 and 12 months** of age to prevent long-term complications like **infertility** and **malignancy**. - Performing the surgery at this age maximizes the chances of **normal testicular development** and reduces the risk of germ cell destruction. *At birth* - It is generally not performed at birth because **spontaneous descent** can still occur within the first few months of life. - Early intervention is usually reserved for specific conditions like **testicular torsion**. *2 years* - Waiting until 2 years of age is considered **too late**, as prolonged exposure to higher abdominal temperatures can cause **irreversible damage** to the testicular tissue. - This delay increases the risk of **compromised fertility** and a higher incidence of **testicular cancer**. *5 years* - Performing orchidopexy at 5 years is significantly **too late**, leading to a high risk of **infertility** and a severely increased risk of **testicular cancer**. - By this age, the potential for normal testicular development is greatly diminished.

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

During feeding. ***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.

Q: Which of the following statements about undescended testis is true?

Increased risk of malignancy. ***Increased risk of malignancy*** - Undescended testis is associated with a **3 to 14 times increased risk** of testicular malignancy, particularly **seminoma**. - The risk remains elevated even after orchiopexy, though the procedure allows for **easier surveillance and examination**. - This is one of the **most important clinical features** of cryptorchidism and a key reason for early surgical correction. - Even a **corrected cryptorchid testis** maintains higher cancer risk compared to normally descended testes. *Secondary sexual characteristics are universally normal* - In **unilateral cryptorchidism** (90% of cases), the normally descended contralateral testis produces **adequate testosterone** for normal secondary sexual development. - However, in **bilateral cryptorchidism** or if the descended testis is functionally impaired, **testosterone deficiency** can occur, leading to delayed or abnormal sexual development. - Therefore, secondary sexual characteristics are **not universally normal** in all cases of undescended testis. *Hormonal therapy is effective* - Hormonal therapy with **hCG (human chorionic gonadotropin)** or **GnRH (gonadotropin-releasing hormone)** has **limited and inconsistent effectiveness**. - Success rates are generally **low** (10-30%), particularly for truly undescended testes (as opposed to retractile testes). - **Orchiopexy** (surgical correction) remains the **definitive treatment**, ideally performed between **6-18 months of age** to optimize fertility potential. *More common on the right side* - Undescended testis is actually **slightly more common on the left side** (~55-60%) than the right (~40-45%). - **Bilateral cryptorchidism** occurs in approximately 10-20% of cases. - There is no significant right-sided predilection.

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

The non-peristaltic affected segment is dilated. ***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.

Q: Among pathological lead points, the commonest cause of intussusception is -

Meckel's diverticulum. ***Meckel's diverticulum*** - Among **pathological lead points** specifically, **Meckel's diverticulum** is the most common cause of intussusception. - It is a true congenital diverticulum that can act as a lead point when it becomes inverted, inflamed, or has associated ectopic tissue or tumors. - While overall intussusception in children is mostly idiopathic, when a **pathological lesion** is identified, Meckel's diverticulum is the leading cause. - Seen in approximately 2% of the population, it follows the "rule of 2s" and is the most frequent anatomical abnormality causing pathological intussusception in pediatric patients. *Hypertrophy of submucous Peyer's patches* - **Peyer's patch hypertrophy** is the most common cause of intussusception **overall** in children (90% of cases), typically following viral infections. - However, this represents **idiopathic intussusception**, not a true pathological lead point, as no discrete anatomical lesion is identified. - The question specifically asks for pathological lead points, which excludes this idiopathic mechanism. *Submucous lipoma* - A **submucous lipoma** can serve as a pathological lead point for intussusception, but is much rarer. - More commonly seen in adults rather than children. - While it is a true pathological lesion, it is less frequent than Meckel's diverticulum as a lead point. *Polyp* - **Polyps** (adenomatous, hamartomatous, or inflammatory) can act as pathological lead points. - More common in adults and in specific syndromes (e.g., Peutz-Jeghers syndrome). - Less frequent than Meckel's diverticulum among pathological causes in the pediatric population.

Q: Surgery for undescended testis is recommended at what age?

12 months. ***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.

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

Develops from jugular lymphatic sequestration. ***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

Q: Most common congenital diaphragmatic hernia is:

Bochdalek hernia. ***Bochdalek hernia*** - This is the most common type of **congenital diaphragmatic hernia (CDH)**, accounting for approximately **95% of all CDH cases**. - It occurs due to a defect in the **posterolateral diaphragm** (pleuroperitoneal membrane), typically on the **left side**. - Presents in neonates with respiratory distress due to herniation of abdominal contents into the thorax. *Morgagni hernia* - This is a rare type of **congenital diaphragmatic hernia**, occurring through the **anterior retrosternal diaphragm** (foramen of Morgagni). - Accounts for only **2-5% of all CDH cases**, usually on the right side. - Often asymptomatic and diagnosed incidentally in adults. *Paraesophageal hernia* - This is an **acquired hiatal hernia** where part of the stomach herniates alongside the esophagus through the esophageal hiatus. - While **hiatal hernias are the most common diaphragmatic hernias overall**, they are **not congenital** and therefore not the answer to this question. - Seen commonly in older adults. *None of the options* - Incorrect, as **Bochdalek hernia** is definitively the most common congenital diaphragmatic hernia.

Question 1

At what age do symptoms of midgut volvulus most commonly present?

Accepted Answer

1 week

Answer

2-3 days

Answer

2-3 weeks

Answer

Within 24 hours

Question 2

At what age is cleft palate ideally repaired?

Accepted Answer

At 1 year of age

Answer

At 5 months of age

Answer

Before school age

Answer

At 6 to 8 years of age

Question 3

At what age is orchidopexy for an incompletely descended testis typically performed?

Accepted Answer

1 year

Answer

At birth

Answer

2 years

Answer

5 years

Question 4

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

Accepted Answer

During feeding

Answer

In the left hypochondrium

Answer

In the right iliac fossa

Answer

Palpation over the epigastrium

Question 5

Which of the following statements about undescended testis is true?

Accepted Answer

Increased risk of malignancy

Answer

Hormonal therapy is effective

Answer

More common on the right side

Answer

Secondary sexual characteristics are universally normal

Question 6

Which of the following statements about Hirschsprung disease is incorrect?

Accepted Answer

The non-peristaltic affected segment is dilated

Answer

Absence of ganglion cells in the involved segment

Answer

Mainly presents in infancy

Answer

Swenson, Duhamel, and Soave are surgical procedures for this condition

Question 7

Among pathological lead points, the commonest cause of intussusception is -

Accepted Answer

Meckel's diverticulum

Answer

Submucous lipoma

Answer

Polyp

Answer

Hypertrophy of submucous peyer's patches

Question 8

Surgery for undescended testis is recommended at what age?

Accepted Answer

12 months

Answer

36 months

Answer

24 months

Answer

6 months

Question 9

Which of the following statements is true regarding cystic hygroma?

Accepted Answer

Develops from jugular lymphatic sequestration

Answer

Non transilluminant

Answer

Lined by endothelial cells

Answer

All of the options

Question 10

Most common congenital diaphragmatic hernia is:

Accepted Answer

Bochdalek hernia

Answer

Morgagni hernia

Answer

None of the options

Answer

Paraesophageal hernia

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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