Pediatric Surgery Practice Questions

Q: A 5-year-old child presents with abdominal pain and jaundice. Imaging reveals a saccular diverticulum of the extrahepatic bile duct. This condition is classified as which type of choledochal cyst?

Type II. ***Type II*** - A **Type II choledochal cyst** is characterized by a **saccular diverticulum** originating from the **extrahepatic bile duct**. - This type of cyst is a rare variant and often presents with symptoms like **abdominal pain** and **jaundice**. *Type I* - **Type I choledochal cysts** are the most common type, involving a **fusiform or cystic dilation** of the **extrahepatic bile duct**. - They do not present as a saccular diverticulum. *Type III* - **Type III choledochal cysts**, also known as **choledococele**, involve a **dilation of the intramural portion** of the common bile duct within the duodenal wall. - They are distinct from a saccular diverticulum of the extrahepatic duct. *Type IV* - **Type IV choledochal cysts** are characterized by **multiple dilations**, affecting both **intrahepatic** and **extrahepatic bile ducts**. - This widely distributed involvement differs from the localized saccular diverticulum described in the question.

Q: Which of the following is LEAST commonly associated with an undescended testis?

Teratoma. ***Correct: Teratoma*** - **Teratomas** are the **LEAST commonly associated** with undescended testis among the options listed - While cryptorchidism increases the overall risk of germ cell tumors, **seminoma** is the predominant histological type (60-75% of testicular cancers in cryptorchid testes) - Teratomas represent only **5-10% of testicular germ cell tumors** and are relatively uncommon compared to seminomas - Pure teratomas are more common in **prepubertal boys**, but in adults with cryptorchidism, seminoma dominates *Incorrect: Seminoma* - **Seminoma** is the **most common** testicular cancer in undescended testes - Cryptorchid testis has a **3-14 fold increased risk** of developing germ cell tumors, with seminoma being the predominant type - Accounts for **60-75%** of malignancies in undescended testes - The abnormal temperature and environment contribute to malignant transformation *Incorrect: Hydrocele* - **Hydrocele** is **VERY COMMON** with undescended testis - **80-90%** of undescended testes have a **patent processus vaginalis**, which can lead to hydrocele formation - Hydrocele and hernia share the same underlying etiology (failure of processus vaginalis closure) - Fluid can accumulate along the spermatic cord or around the testis *Incorrect: Hernia* - **Indirect inguinal hernia** is **extremely common** with cryptorchidism - Present in **80-90%** of cases due to patent processus vaginalis - The open communication between the abdominal cavity and inguinal canal/scrotum allows herniation of abdominal contents - Often requires surgical correction during orchidopexy

Q: Orchidopexy is done in cases of undescended testes at what age?

1 – 2 years. ***1 – 2 years*** - **Orchidopexy** is generally recommended between **6 and 18 months of age**, though it remains acceptable up to **2 years**. - This timeframe allows for potential spontaneous descent during the first 6 months of life while minimizing the duration of adverse effects on testicular development and function. - Early intervention (ideally before 18 months) helps prevent long-term complications of cryptorchidism, such as **infertility** and **increased risk of malignancy**. *Neonate* - Most cases of **undescended testes** in neonates are due to a **physiological delay** in descent, with spontaneous descent often occurring within the first **6 months**. - Performing surgery at the neonatal stage is considered **premature**, as observation is the initial approach. *5 years* - Delaying **orchidopexy** until 5 years of age is generally considered too late, as prolonged exposure to higher temperatures in the abdomen leads to **irreversible damage** to germ cells and an increased risk of malignancy. - The optimal window for preserving testicular function and reducing cancer risk is missed by this age. *Puberty* - Performing orchidopexy at **puberty** is significantly delayed and will not reverse the **damage to fertility potential** or the increased risk of testicular cancer that has already occurred. - By this age, the primary benefits of early intervention are largely lost, and the surgery is mainly to allow for easier **self-examination** for malignancy.

Q: What is the most definitive indication for surgery in necrotizing enterocolitis?

Pneumoperitoneum- Stage IIIB of NEC. ***Pneumoperitoneum- Stage IIIB of NEC*** - **Pneumoperitoneum** (free air in the peritoneal cavity) is the **most definitive indication** for immediate surgical intervention in necrotizing enterocolitis (NEC), as it provides radiological proof of bowel perforation. - This finding represents advanced disease (**Stage IIIB** according to the **modified Bell's staging criteria**) and is an **absolute indication for surgery**. - Pneumoperitoneum is detected on plain abdominal radiographs or cross-table lateral films and indicates full-thickness bowel necrosis with perforation. *Pneumatosis intestinalis- Stage IIA of NEC* - **Pneumatosis intestinalis** (intramural gas in the bowel wall) is a hallmark radiological sign of NEC but does **not** warrant surgery in Stage IIA. - Stage IIA is managed with **medical therapy** including NPO (nil per oral), nasogastric decompression, broad-spectrum antibiotics, and supportive care unless there are signs of clinical deterioration or progression to advanced stages. *Portal Vein gas- Stage IIB of NEC* - **Portal vein gas** indicates severe bowel ischemia and necrosis and is a concerning prognostic sign associated with advanced NEC (Stage IIB). - While it signifies severe disease, portal vein gas is **not an absolute indication for surgery** by itself; surgical intervention is based on overall clinical status, presence of peritonitis, or pneumoperitoneum. *Peritonitis- Stage IIIA of NEC* - Clinical signs of **peritonitis** (abdominal wall erythema, edema, tenderness, guarding, rigidity) indicate Stage IIIA NEC and **are also an indication for surgery**. - However, **pneumoperitoneum** is considered the **most definitive** indication as it provides objective radiological evidence of perforation, whereas peritonitis is based on clinical examination which can be challenging in premature neonates.

Q: Which of the following is NOT a feature of hypospadias?

Cryptorchidism. ***Cryptorchidism*** - While **cryptorchidism** (undescended testes) can sometimes co-occur with hypospadias (in up to 10% of cases, especially severe proximal types), it is **NOT a defining feature or characteristic of hypospadias itself**. - Hypospadias is primarily a malformation of the urethra and penis, whereas cryptorchidism is a distinct abnormality of testicular descent. - They are separate congenital anomalies that may share common developmental pathways but are not causally related. *Chordee* - **Chordee** is a common associated feature of hypospadias, present in approximately 15-20% of cases. - It is characterized by ventral curvature of the penis, particularly noticeable during erection, due to fibrous tissue tethering the ventral aspect. - Often requires surgical correction along with hypospadias repair. *Hooded prepuce* - A **hooded prepuce** (dorsal hood) is a **classic and consistent feature** of hypospadias, present in the majority of cases. - The foreskin does not fully encircle the glans but instead forms a hood on the dorsal aspect, with ventral deficiency. - This occurs due to incomplete fusion of the urethral folds and arrested development of the ventral foreskin. *Ventral urethral meatus* - A **ventral urethral meatus** (urethral opening on the underside of the penis rather than at the tip) is the **defining feature** of hypospadias. - The location can vary from glandular (on the glans) to coronal, penile shaft, penoscrotal, or perineal positions. - This is the primary anatomical abnormality that characterizes the condition.

Q: Which of the following is the least common cause of pain associated with ovarian cysts in children?

Stretch of Infundibulopelvic ligament. ***Stretch of Infundibulopelvic ligament*** - While other causes directly involve mechanical stress or disruption of ovarian tissue, **ligamentous stretch** is a less common and often secondary contributor to significant pain in children with ovarian cysts. - The sensation of pain from ligament stretch is typically less acute and severe compared to processes like torsion or rupture. *Peritoneal bleeding from rupture* - **Rupture of an ovarian cyst** can lead to significant **hemoperitoneum**, causing acute and severe abdominal pain due to peritoneal irritation. - This is a relatively common cause of acute pain in children with ovarian cysts, particularly for larger or hemorrhagic cysts. *Ovarian torsion* - **Ovarian torsion** involves the twisting of the **ovary and fallopian tube** around the suspensory ligament, compromising its blood supply. - This is a medical emergency and a common cause of severe, acute, and often intermittent abdominal pain, nausea, and vomiting in children with ovarian cysts. *Expansion of ovarian cortex* - **Rapid expansion** of the ovarian cortex due to a growing cyst can cause pain by stretching the **ovarian capsule**. - This is a common mechanism of pain, particularly with rapidly enlarging or large cysts, as the capsule has numerous pain receptors.

Q: What is the last resort treatment for rectal prolapse in childhood?

Thiersch wiring. ***Thiersch wiring*** - This procedure involves placing a **silver wire or non-absorbable suture** circumferentially around the anus to prevent external prolapse. - It is considered a **last resort** for rectal prolapse in children due to its potential complications and the fact that most childhood prolapses resolve spontaneously or with less invasive measures. - Reserved for cases that fail conservative treatment and minimally invasive options. *Lahaut's operation* - Lahaut's operation involves **injection of sclerosing agents** (sclerotherapy) into the perirectal tissues to induce fibrosis and fixation. - While this is a recognized minimally invasive approach for rectal prolapse, it is **not considered the last resort** in pediatric cases. - Thiersch wiring is typically reserved as the last surgical option when other measures fail. *Incision of prolapsed mucosa* - This is an **unconventional and potentially harmful** approach for rectal prolapse, as it risks severe bleeding, infection, and damage to the rectal tissue. - It does not address the underlying structural issues causing the prolapse and is not a recognized treatment. *Ripstein operation* - The Ripstein procedure (anterior sling rectopexy) is a **rectopexy** technique primarily used for **adult rectal prolapse**. - It involves fixing the rectum to the sacrum with a synthetic mesh and is generally too invasive for pediatric cases, especially when simpler options like Thiersch wiring are available.

Q: Cystic hygroma is typically found in which of the following locations?

Neck. ***Neck*** - Cystic hygromas are most commonly found in the **neck**, particularly in the **posterior cervical triangle** [1]. - They arise from congenital malformations of the **lymphatic system**, often near the jugular lymphatic sacs [1]. *Axilla* - While cystic hygromas can occur in the axilla, it is a **less common site** compared to the neck [1]. - Axillary involvement typically represents a **lymphatic malformation** in that region. *Mediastinum* - **Mediastinal cystic hygromas** are rare and can present with respiratory symptoms due to compression of thoracic structures [1]. - However, the neck is the **predominant location** for these lymphatic malformations. *Calf* - Cystic hygromas in the **calf** or other extremities are exceedingly rare, typically seen as part of generalized lymphatic malformations. - The most frequent presentation is a **soft, compressible mass** in the neck region [1].

Q: How would you confirm Hirschsprung's disease?

Rectal biopsy. ***Rectal biopsy*** - A **rectal biopsy** is the gold standard for diagnosing Hirschsprung's disease by demonstrating the absence of **ganglion cells** in the affected bowel segment. - Absence of **ganglion cells** in the submucosal (Meissner's) and myenteric (Auerbach's) plexuses is a definitive diagnostic feature confirming aganglionosis. *Colonoscopy* - While colonoscopy can visualize the colon, it is not diagnostic for Hirschsprung's disease as it does not directly assess for the presence of **ganglion cells**. - It might show a dilated proximal colon but cannot confirm the **aganglionic segment**. *Ba enema* - A **barium enema** can show a transition zone between a dilated, normally innervated proximal colon and a narrowed, aganglionic distal segment. - This imaging study is highly suggestive but not confirmatory, as it is an anatomical rather than a histological diagnosis and may not be reliable in newborns. *Ba meal* - A **barium meal** with follow-through is used to evaluate the upper gastrointestinal tract and small bowel. - This study is not relevant for the diagnosis of Hirschsprung's disease, which affects the large intestine.

Q: One of the following will always present with bilious vomiting:

Atresia of the 3rd part of the duodenum. ***Atresia of the 3rd part of the duodenum*** - **Duodenal atresia** distal to the **ampulla of Vater** will always result in bile refluxing into the stomach and subsequent **bilious vomiting** because the obstruction is *after* the entry of bile. - This congenital anomaly prevents food from passing through the duodenum, causing a complete obstruction and the characteristic vomiting. *Pyloric stenosis* - Pyloric stenosis is an obstruction at the **pylorus** (the outlet of the stomach), *before* the entry of bile from the common bile duct. - Consequently, the vomiting associated with pyloric stenosis is typically **non-bilious**, described as "projectile non-bilious emesis." *Esophageal atresia* - **Esophageal atresia** is a congenital condition where the esophagus does not develop properly, resulting in a blind-ending pouch. - Infants with esophageal atresia typically present with **frothing and bubbling from the mouth**, coughing, and choking during feeds, and generally do not have vomiting, especially not bilious. *Malrotation of the gut* - While **intestinal malrotation** can cause intestinal obstruction due to **Ladd's bands** compressing the duodenum or a **volvulus**, bilious vomiting is not *always* present. - The presence and nature of vomiting depend on the specific type and severity of the obstruction, which can be intermittent or complete, and may or may not involve bile, especially if the obstruction is high in the duodenum.

Question 1

A 5-year-old child presents with abdominal pain and jaundice. Imaging reveals a saccular diverticulum of the extrahepatic bile duct. This condition is classified as which type of choledochal cyst?

Accepted Answer

Type II

Answer

Type I

Answer

Type III

Answer

Type IV

Question 2

Which of the following is LEAST commonly associated with an undescended testis?

Accepted Answer

Teratoma

Answer

Hernia

Answer

Seminoma

Answer

Hydrocele

Question 3

Orchidopexy is done in cases of undescended testes at what age?

Accepted Answer

1 – 2 years

Answer

Neonate

Answer

5 years

Answer

Puberty

Question 4

What is the most definitive indication for surgery in necrotizing enterocolitis?

Accepted Answer

Pneumoperitoneum- Stage IIIB of NEC

Answer

Pneumatosis intestinalis- Stage IIA of NEC

Answer

Peritonitis- Stage IIIA of NEC

Answer

Portal Vein gas- Stage IIB of NEC

Question 5

Which of the following is NOT a feature of hypospadias?

Accepted Answer

Cryptorchidism

Answer

Chordee

Answer

Hooded prepuce

Answer

Ventral urethral meatus

Question 6

Which of the following is the least common cause of pain associated with ovarian cysts in children?

Accepted Answer

Stretch of Infundibulopelvic ligament

Answer

Peritoneal bleeding from rupture

Answer

Ovarian torsion

Answer

Expansion of ovarian cortex

Question 7

What is the last resort treatment for rectal prolapse in childhood?

Accepted Answer

Thiersch wiring

Answer

Lahaut's operation

Answer

Incision of prolapsed mucosa

Answer

Ripstein operation

Question 8

Cystic hygroma is typically found in which of the following locations?

Accepted Answer

Neck

Answer

Axilla

Answer

Mediastinum

Answer

Calf

Question 9

How would you confirm Hirschsprung's disease?

Accepted Answer

Rectal biopsy

Answer

Colonoscopy

Answer

Ba enema

Answer

Ba meal

Question 10

One of the following will always present with bilious vomiting:

Accepted Answer

Atresia of the 3rd part of the duodenum

Answer

Pyloric stenosis

Answer

Esophageal atresia

Answer

Malrotation of the gut

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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