Pediatric Surgery Practice Questions

Q: At what age is a unilateral undescended testis typically considered for surgical intervention?

12 months of age. **Explanation:** The management of an undescended testis (cryptorchidism) is guided by the natural history of testicular descent. **1. Why 12 months is the correct answer:** Most undescended testes descend spontaneously within the first few months of life. However, spontaneous descent is rare after the age of **6 months**. Current clinical guidelines (including AAP and IAP) recommend that if the testis has not descended by 6 months, surgical intervention (**Orchidopexy**) should be planned. The procedure is ideally performed between **6 and 12 months** of age, and certainly before 18 months, to preserve fertility potential and reduce the risk of malignancy. In the context of NEET-PG, **12 months** is the standard milestone by which surgical correction should be completed or initiated. **2. Why other options are incorrect:** * **2 months (A):** Too early; there is a high probability of spontaneous descent during the first 3–4 months. * **6 months (B):** This is the age at which we *decide* surgery is necessary because spontaneous descent stops, but 12 months is the conventional upper limit for the intervention to be finalized. * **14 months (D):** While surgery can be done here, it is considered delayed. Delaying beyond 12–18 months increases the risk of germ cell loss and histological changes. **Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Complications:** Infertility (most common), Testicular Torsion, Inguinal Hernia, and Testicular Cancer (Seminoma is the most common). * **Surgery:** Orchidopexy does not eliminate the risk of cancer but makes the testis accessible for physical examination/screening. * **Hormonal therapy:** (hCG or GnRH) is generally not recommended as first-line treatment due to low efficacy compared to surgery.

Q: Which of the following statements about appendicitis in children is false?

Vomiting precedes abdominal pain.. In pediatric surgery, the sequence of symptoms is a critical diagnostic marker for acute appendicitis. **Explanation of the Correct Answer (B):** In acute appendicitis, the classic sequence of symptoms is **abdominal pain followed by vomiting**. The pain typically begins as periumbilical (visceral) and later shifts to the right iliac fossa (somatic). If vomiting precedes the onset of pain, clinicians should strongly suspect other diagnoses, such as gastroenteritis or intestinal obstruction. Therefore, statement B is false. **Analysis of Other Options:** * **Option A:** Localized pain (especially in the right lower quadrant) remains the **single most important and reliable symptom** for diagnosing appendicitis in children who are old enough to communicate. * **Option C:** In children younger than 5 years, the omentum is underdeveloped and cannot effectively "wrap" the inflamed appendix. This, combined with diagnostic delays in non-verbal children, leads to a high perforation rate of approximately **80%**. * **Option D:** The progression of appendicitis is rapid in pediatric patients. Statistics show that roughly **60% of perforations** occur within the first 48 hours of symptom onset, emphasizing the need for early surgical consultation. **High-Yield NEET-PG Pearls:** * **Most common cause of emergency abdominal surgery** in children: Acute appendicitis. * **Alvarado Score:** Used for diagnosis; a score of ≥7 is highly suggestive. * **The "Omentum" Factor:** The "policeman of the abdomen" is thin and short in toddlers, leading to generalized peritonitis rather than localized abscesses. * **Differential Diagnosis:** Always consider mesenteric adenitis (often follows a viral URTI) and Meckel’s diverticulitis.

Q: Split skin grafts in young children should be harvested from which anatomical location?

Thigh. **Explanation:** In pediatric surgery, the **thigh** is the preferred donor site for harvesting split-thickness skin grafts (STSG). This choice is primarily based on the **surface area availability** and **ease of access**. The thigh provides a large, flat, and relatively broad surface area, which is essential for harvesting a uniform graft using a dermatome or a Humby’s knife. Additionally, the skin on the thigh is thick enough to allow for harvesting without compromising the underlying structures, and the donor site can be easily concealed by clothing once healed. **Analysis of Options:** * **Buttocks (Option A):** While the buttocks provide a large surface area and are aesthetically hidden, they are a poor choice in young children due to the high risk of **fecal contamination** and moisture, which leads to infection and delayed healing of the donor site. * **Trunk (Option C):** The trunk is generally avoided in children because the skin is thinner, and harvesting here can interfere with future growth or lead to more visible scarring on the chest or abdomen. * **Upper Limb (Option D):** The upper limb has a limited surface area and more contoured surfaces, making it technically difficult to harvest a large, uniform graft. It is also a highly visible area. **Clinical Pearls for NEET-PG:** * **Thickness:** A split-thickness graft includes the entire epidermis and a variable portion of the dermis. * **Healing:** Donor sites heal by **re-epithelialization** from the skin appendages (hair follicles, sebaceous glands) remaining in the dermis. * **Graft Take:** The most common cause of skin graft failure is a **hematoma** under the graft, followed by infection and shear forces. * **Post-op:** In children, the donor site is often more painful than the recipient site; hence, adequate analgesia and occlusive dressings are vital.

Q: Kasai's procedure is the treatment of choice for which condition?

Biliary atresia. **Explanation** **Biliary Atresia** is the correct answer. It is a progressive fibro-inflammatory obliteration of the extrahepatic biliary tree, leading to obstructive jaundice in neonates. **Kasai’s procedure (Hepatoportoenterostomy)** is the standard surgical treatment. It involves the excision of the biliary remnants at the porta hepatis and the creation of a Roux-en-Y jejunal loop to allow bile drainage directly from the liver surface. For the best prognosis, it should ideally be performed before **60 days of life**. **Analysis of Incorrect Options:** * **Congenital Hypertrophic Pyloric Stenosis (CHPS):** The treatment of choice is **Ramstedt’s Pyloromyotomy**, where the hypertrophied pyloric muscle is incised longitudinally while keeping the mucosa intact. * **Duodenal Atresia:** Characterized by the "double bubble" sign on X-ray, the surgical management is **Duodenoduodenostomy** (Kimura’s procedure). * **Hirschsprung’s Disease:** This is a functional obstruction due to aganglionosis. Definitive treatment involves "pull-through" procedures such as **Duhamel, Soave, or Swenson** techniques. **High-Yield Clinical Pearls for NEET-PG:** * **Kasai’s Success:** If the procedure fails or cirrhosis develops, **Liver Transplantation** is the definitive treatment. Biliary atresia is the most common indication for pediatric liver transplant. * **Diagnostic Gold Standard:** Intraoperative Cholangiogram (IOC). * **Screening:** The "Stool Color Card" is used in some regions to screen for pale/acholic stools. * **Triad of Biliary Atresia:** Jaundice, acholic stools, and hepatomegaly in a neonate.

Q: When should an invertogram be performed in a newborn?

After 6 hours. **Explanation:** The **invertogram** (Wangensteen-Rice view) is a specialized radiographic technique used to assess the level of atresia in newborns with **Anorectal Malformations (ARM)**. **Why 6 hours is the correct timing:** In a newborn, the gastrointestinal tract is initially empty of air. After birth, the infant swallows air, which must travel through the entire length of the bowel to reach the distal-most rectal pouch. It takes approximately **6 to 12 hours** for swallowed air to reach the rectum. Performing the X-ray before this period may lead to a false-positive diagnosis of a "high" lesion, as the air column has not yet reached its most distal point, potentially leading to incorrect surgical planning. **Analysis of Incorrect Options:** * **A, B, and C (Immediately, 2 hours, 4 hours):** These timeframes are too early. At these stages, the air is likely still in the stomach or small intestine. An invertogram performed during this window would show a large gap between the gas bubble and the perineal skin marker, inaccurately suggesting a high-level atresia. **Clinical Pearls for NEET-PG:** * **Positioning:** The infant is held upside down for 3–5 minutes before the X-ray (with a radio-opaque marker on the anal dimple) to allow air to displace any meconium and reach the end of the pouch. * **Key Landmark:** The **PC line** (Pubococcygeal line) is used to classify the malformation. If the gas bubble is above this line, it is a "High" lesion; if below, it is "Low." * **Modern Alternative:** Prone cross-table lateral radiography is now often preferred over the invertogram as it is less stressful for the neonate and avoids respiratory compromise. * **Associated Anomalies:** Always remember the **VACTERL** association when a case of ARM is presented.

Q: Which is the least common site of volvulus in children?

Large bowel volvulus. **Explanation:** In pediatric surgery, volvulus is most commonly associated with **Malrotation of the Midgut**, where the small bowel twists around the superior mesenteric artery. Among the options provided, **Large bowel volvulus (Option C)** is the least common site in children. While sigmoid or cecal volvulus can occur, they are predominantly conditions of the elderly or those with chronic constipation/megacolon. In children, the large bowel is relatively fixed to the retroperitoneum, making primary colonic volvulus an exceedingly rare clinical entity compared to small bowel involvement. **Analysis of Options:** * **Ilio-iliac and Ileocecal Volvulus (Options A & B):** These are forms of small bowel or midgut volvulus. Because the midgut (from the duodenum to the mid-transverse colon) shares a narrow mesenteric base in cases of malrotation, these segments are highly prone to twisting. Ileocecal volvulus is a recognized variant in the pediatric population. * **Sigmoid Colon Volvulus (Option D):** While more common than other parts of the large bowel, it remains rare in children compared to small bowel volvulus. It is usually seen only in specific pediatric contexts like Hirschsprung’s disease or chronic intestinal pseudo-obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Site:** Midgut (Small bowel) due to malrotation. * **Gold Standard Investigation:** Upper GI Contrast Study (shows "Corkscrew appearance" of the duodenum). * **Ladd’s Procedure:** The definitive surgery for midgut volvulus (includes counter-clockwise detorsion, widening the mesenteric base, and appendectomy). * **Clinical Presentation:** Sudden onset **bilious vomiting** in a neonate is midgut volvulus until proven otherwise.

Question 1

What is true about Cystic Hygroma?

Accepted Answer

Develops from jugular lymphatic sequestration

Answer

Most common in adults

Answer

Does not transilluminate

Answer

Lined by stratified squamous epithelium

Question 2

At what age is a unilateral undescended testis typically considered for surgical intervention?

Accepted Answer

12 months of age

Answer

2 months of age

Answer

6 months of age

Answer

14 months of age

Question 3

Which of the following statements about appendicitis in children is false?

Accepted Answer

Vomiting precedes abdominal pain.

Answer

Localized pain is the single most important symptom.

Answer

Perforation occurs in 80% of cases in children younger than 5 years.

Answer

60% of perforations occur within 48 hours of symptom onset.

Question 4

Split skin grafts in young children should be harvested from which anatomical location?

Accepted Answer

Thigh

Answer

Buttocks

Answer

Trunk

Answer

Upper limb

Question 5

Kasai's procedure is the treatment of choice for which condition?

Accepted Answer

Biliary atresia

Answer

Congenital hypertrophic pyloric stenosis

Answer

Duodenal atresia

Answer

Hirschsprung's disease

Question 6

What is the better prognostic factor for operation of biliary duct obstruction in a newborn?

Accepted Answer

Age of 8 weeks

Answer

No passage of bile

Answer

Size of ductule > 200 micron

Answer

Weight of baby > 3 kg

Question 7

When should an invertogram be performed in a newborn?

Accepted Answer

After 6 hours

Answer

Immediately

Answer

After 2 hours

Answer

After 4 hours

Question 8

Recurrent pain abdomen with intestinal obstruction and a mass passing per rectum is most suggestive of which condition?

Accepted Answer

Intussusception

Answer

Internal herniation

Answer

Stricture

Answer

Strangulated hernia

Question 9

Which of the following complications of cryptorchidism cannot be prevented by orchiopexy?

Accepted Answer

Testicular tumor

Answer

Epididymo-orchitis

Answer

Torsion of the testis

Answer

Sexual ambiguity

Question 10

Which is the least common site of volvulus in children?

Accepted Answer

Large bowel volvulus

Answer

Ilio iliac volvulus

Answer

Ileocecal volvulus

Answer

Sigmoid colon volvulus

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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