Pediatric Surgery Practice Questions

Q: What is the surgical treatment for duodenal atresia?

Duodenoduodenostomy. **Explanation:** **Duodenal Atresia** is a common cause of neonatal intestinal obstruction, characterized by the failure of recanalization of the duodenum during the 8th–10th week of gestation. **Why Duodenoduodenostomy is the Correct Answer:** The gold standard surgical treatment for duodenal atresia is a **Diamond-shaped Duodenoduodenostomy** (Kimura’s procedure). In this technique, a transverse incision is made in the proximal dilated duodenum and a longitudinal incision in the distal collapsed segment. This side-to-side anastomosis bypasses the atretic segment while preserving the normal anatomical flow and the ampulla of Vater. **Analysis of Incorrect Options:** * **Roux-en-Y procedure:** This is a diversion technique used in gastric bypass or biliary reconstruction; it is not indicated for simple intestinal atresia. * **Duodenojejunostomy:** While historically used, it is now reserved only for cases where the distal duodenum is too short or inaccessible for a direct anastomosis. It carries a higher risk of "blind loop syndrome." * **Duodenal canalization:** This is a physiological process that occurs in utero. If it fails, surgery is required; "canalization" is not a surgical procedure. **High-Yield Clinical Pearls for NEET-PG:** * **Association:** 30% of cases are associated with **Down Syndrome** (Trisomy 21). * **X-ray Finding:** The classic **"Double Bubble Sign"** (air in the stomach and proximal duodenum). * **Vomiting:** Usually **bilious** (as the atresia is typically distal to the ampulla of Vater). * **Polyhydramnios:** Frequently noted in the maternal prenatal history. * **Annular Pancreas:** This is the most common extrinsic cause leading to the same clinical presentation and treatment.

Q: Which of the following is NOT included in the criteria for assessing a child's condition?

Serum albumin. This question refers to the **Kasai’s Criteria** (also known as the Kasai Prognostic Score), which is used to assess the clinical condition and prognosis of infants with **Biliary Atresia** following a Kasai portoenterostomy. ### Explanation of the Correct Answer **C. Serum Albumin:** While albumin is a marker of liver synthetic function, it is **not** a component of the specific criteria used to assess the immediate postoperative condition or prognosis in the Kasai classification. The criteria focus more on active cholestasis and nutritional impact rather than synthetic protein markers. ### Analysis of Incorrect Options * **A. Nutritional Status:** This is a vital component. Poor weight gain and failure to thrive are significant indicators of ongoing malabsorption and liver dysfunction in biliary atresia. * **B. Serum Bilirubin:** This is the most critical biochemical marker. The clearance of jaundice (Bilirubin < 2 mg/dL) post-surgery is the primary predictor of long-term native liver survival. * **D. ALT / AST:** Serum transaminases are included as markers of ongoing hepatocellular injury and inflammatory activity within the liver parenchyma. ### NEET-PG High-Yield Pearls * **Biliary Atresia (BA):** The most common cause of neonatal cholestasis requiring surgery. * **Kasai Portoenterostomy:** Best performed before **60 days of life**. Success rates drop significantly after 90 days. * **Most Common Type:** Type III (involving the entire extrahepatic biliary tree) is the most frequent (90%). * **Triangular Cord Sign:** A high-yield USG finding in BA representing a cone-shaped fibrotic mass at the porta hepatis. * **Gold Standard Diagnosis:** Intraoperative Cholangiogram (IOC). * **Prognosis:** If the Kasai procedure fails, **Liver Transplantation** is the definitive treatment.

Q: All of the following are suggestive of a low lesion in anorectal malformation except?

Meconuria. In pediatric surgery, Anorectal Malformations (ARM) are classified into **Low, Intermediate, and High** lesions based on the relationship of the rectum to the levator ani muscle (specifically the puborectalis sling). ### Why Meconuria is the Correct Answer **Meconuria** (passage of meconium in urine) signifies a **recto-urinary fistula**, which occurs when the rectum communicates with the prostatic or bulbar urethra (in males) or the bladder neck. This anatomical communication is only possible in **High or Intermediate lesions**. In low lesions, the rectum descends through the levator muscle complex, so any fistula present will be cutaneous (perineal), not visceral. ### Explanation of Incorrect Options (Low Lesion Features) * **Bucket Handle Deformity:** A pathognomonic sign of a low lesion. It is a bridge of skin at the anal site under which a probe can be passed, often containing meconium. * **Midline Raphe Fistula:** A low lesion where a small tract runs anteriorly along the perineal raphe, often appearing as small black pearls of meconium under the skin. * **Perineal Fistula:** The most common presentation of a low lesion in both sexes. The rectum opens onto the perineum anterior to the center of the sphincter complex. ### NEET-PG High-Yield Pearls * **Invertogram (Wangensteen-Rice view):** Historically used to classify ARM; performed after **18–24 hours** of life to allow air to reach the distal rectum. * **VACTERL Association:** Most common in high lesions (Vertebral, Anal, Cardiac, Tracheo-Esophageal, Renal, Limb anomalies). * **Management:** Low lesions usually require a **primary anoplasty**. High lesions require a three-stage procedure: **Colostomy → PSARP (Posterior Sagittal Anorectoplasty/Pena’s procedure) → Colostomy closure.**

Q: A child presented with evisceration of bowel loops coming out of a defect in the abdominal wall to the right of the umbilicus. What is the possible diagnosis?

Gastroschisis. ### Explanation The clinical presentation of bowel loops protruding through a defect to the **right of the umbilicus** is the classic hallmark of **Gastroschisis**. **1. Why Gastroschisis is Correct:** Gastroschisis is a full-thickness paraumbilical abdominal wall defect (usually <4 cm) occurring almost exclusively to the right of a normally inserted umbilical cord. It results from an involution of the second right vitelline artery. Because there is **no peritoneal sac** covering the herniated contents, the bowel loops are directly exposed to amniotic fluid, leading to a thickened, edematous, and "matted" appearance (chemical peritonitis). **2. Why Other Options are Incorrect:** * **Exomphalos (Omphalocele):** The defect occurs **at the umbilicus** (central), and the herniated viscera are **covered by a sac** consisting of peritoneum and amnion. The umbilical cord inserts directly into the apex of the sac. * **Umbilical Hernia:** This is a protrusion through a weak umbilical ring **covered by intact skin**. It rarely presents as evisceration and usually resolves spontaneously. * **Patent Urachus:** This is a communication between the bladder and the umbilicus, leading to the discharge of **urine** from the umbilicus, not bowel evisceration. **3. NEET-PG High-Yield Pearls:** * **Gastroschisis:** Associated with **young maternal age**, smoking, and intestinal atresia (10%). It is rarely associated with chromosomal anomalies. * **Omphalocele:** Strongly associated with **chromosomal trisomies (13, 18, 21)** and syndromes like **Beckwith-Wiedemann** (macroglossia, organomegaly, hypoglycemia). * **Management:** Gastroschisis requires immediate covering with a sterile "silo" bag to prevent fluid loss and infection, followed by staged or primary surgical closure.

Q: A 6-month-old child is brought to the clinic. The image shows the condition. What is the appropriate management protocol?

Surgery after 5 years. ***Surgery after 5 years*** - **Umbilical hernias** in infants typically resolve spontaneously by age **4-5 years** as the rectus muscles strengthen and the umbilical ring closes naturally. - Surgery is indicated after **5 years of age** if the hernia persists, as spontaneous closure becomes unlikely beyond this age. *Indication of surgery if not resolved by 2 years* - Most **umbilical hernias** continue to resolve spontaneously between **2-5 years** of age, making early surgical intervention unnecessary. - The **2-year mark** is too early for surgical consideration unless there are complications like **incarceration** or **strangulation**. *Immediate surgery* - **Immediate surgery** is only indicated for complications such as **incarceration**, **strangulation**, or **bowel obstruction**. - In uncomplicated cases, **expectant management** is preferred as most umbilical hernias resolve without intervention. *Hernioplasty* - **Hernioplasty** refers to mesh repair techniques used in adult hernias, not appropriate for pediatric umbilical hernias. - Simple **herniorrhaphy** (tissue repair) is the preferred technique in children when surgery is indicated.

Q: Which of the following statements about posterior urethral valves in a neonate is true?

Bilateral hydronephrosis may be present.. **Explanation:** **Posterior Urethral Valves (PUV)** are the most common cause of bladder outlet obstruction in male infants. They consist of abnormal mucosal folds in the distal prostatic urethra that act as a one-way valve, impeding urinary flow. 1. **Why Option A is Correct:** The obstruction at the level of the urethra causes high intravesical pressure, which is transmitted retrogradely to the ureters and kidneys. This leads to **bilateral hydroureteronephrosis** and bladder wall hypertrophy. In severe cases, this pressure causes renal dysplasia and can lead to Potter sequence (due to oligohydramnios). 2. **Why Option B is Incorrect:** Because PUV causes significant bilateral renal obstruction and potential parenchymal damage, **creatinine and urea levels are typically elevated** (azotemia) in the neonatal period. Monitoring the "nadir creatinine" after drainage is a key prognostic indicator. 3. **Why Option C is Incorrect:** While the valves do cause **dilation (ballooning) of the prostatic urethra** proximal to the obstruction, they do not "enlarge" the urethra in a physiological sense; rather, they are the obstructing membranes themselves. 4. **Why Option D is Incorrect:** PUV occurs **exclusively in males**. In females, the embryological equivalent is rare and presents differently. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** Poor urinary stream (dribbling), palpable bladder, and bilateral renal masses. * **Gold Standard Investigation:** **Voiding Cystourethrogram (VCUG)** showing a dilated prostatic urethra ("spinning top" appearance) and the valve itself. * **Initial Management:** Catheterization (using a small feeding tube) to decompress the system, followed by **Endoscopic Fulguration** of the valves. * **Key Sign on Ultrasound:** The **"Keyhole Sign"** (dilated bladder and dilated posterior urethra).

Q: A 9-month-old boy presents with scrotal swelling. Physical examination reveals a scrotal mass that can be transilluminated and is composed of clear serous fluid. What is the most appropriate diagnosis?

Hydrocele. **Explanation:** The clinical presentation of a painless scrotal swelling that **transilluminates** in an infant is a classic hallmark of a **Hydrocele**. **1. Why Hydrocele is correct:** A hydrocele is an accumulation of serous fluid within the tunica vaginalis. In infants, this is typically a **communicating hydrocele**, caused by the failure of the **processus vaginalis** to obliterate. The presence of clear serous fluid allows light to pass through the scrotum (positive transillumination test), which is the definitive physical finding to differentiate fluid-filled sacs from solid masses. **2. Why other options are incorrect:** * **Epididymitis:** This is an inflammatory condition characterized by severe pain, fever, and scrotal erythema. It would not present as a painless, transilluminating mass. * **Hematocele:** This is a collection of blood within the tunica vaginalis, usually following trauma or surgery. Because blood is opaque, a hematocele **does not transilluminate**. * **Spermatocele:** These are retention cysts of the epididymis containing spermatozoa. While they can transilluminate, they are exceptionally rare in infants and typically present as a distinct mass superior to the testis in post-pubertal males. **Clinical Pearls for NEET-PG:** * **Management:** Most congenital hydroceles resolve spontaneously by **1–2 years of age**. Surgical intervention (inguinal herniotomy) is indicated if it persists beyond age 2 or if an associated inguinal hernia is present. * **Anatomy:** The fluid in a hydrocele collects between the parietal and visceral layers of the **tunica vaginalis**. * **Differential:** Always perform the "get above the swelling" test; if you cannot get above it, suspect an **indirect inguinal hernia**.

Q: All of the following are false in the case of hypertrophic pyloric stenosis, EXCEPT?

Ultrasonography is the diagnostic test. **Explanation:** **Infantile Hypertrophic Pyloric Stenosis (IHPS)** is a condition characterized by hypertrophy of the circular muscle fibers of the pylorus, leading to gastric outlet obstruction. **Why Option D is Correct:** **Ultrasonography (USG)** is currently the **gold standard diagnostic investigation** for IHPS. It is non-invasive and highly accurate. Diagnostic criteria include a **pyloric muscle thickness >3 mm** and a **pyloric canal length >14 mm**. On USG, this appears as the "Target sign" or "Donut sign" in cross-section. **Analysis of Incorrect Options:** * **Option A:** IHPS typically presents between **3 to 6 weeks of life**. It is rarely symptomatic within the first week, as the hypertrophy takes time to develop. The classic presentation is non-bilious, projectile vomiting. * **Option B:** While an "olive-shaped" lump in the epigastrium is a pathognomonic clinical finding, it is **not always palpable**. It is best felt when the stomach is empty and the abdominal wall is relaxed (often during a "test feed"). Success rates for palpation vary based on the clinician's experience. * **Option C:** The treatment of choice is **Ramstedt’s Pyloromyotomy** (longitudinal incision of the serosa and muscle, leaving the mucosa intact). Finney’s pyloroplasty is a reconstructive procedure used for different indications (like peptic ulcer complications) and is not used for IHPS. **High-Yield NEET-PG Pearls:** * **Metabolic Abnormality:** Hypochloremic, hypokalemic, metabolic alkalosis with **paradoxical aciduria** (due to loss of HCl and subsequent renal compensation). * **Barium Swallow Sign:** "String sign" (narrowed pyloric canal) or "Beak sign." * **Initial Management:** Always correct dehydration and electrolyte imbalances (using 0.45% or 0.9% NS with Potassium) **before** surgery. IHPS is a medical emergency but a surgical priority, not an immediate surgical emergency.

Q: At what age should an asymptomatic umbilical hernia be repaired?

5 years. **Explanation:** Umbilical hernias in children are common congenital defects caused by the failure of the umbilical ring to close after birth. Unlike inguinal hernias, most umbilical hernias undergo **spontaneous closure** as the abdominal wall muscles strengthen and the rectus abdominis muscles approximate in the midline. **Why 5 years is the correct answer:** Current surgical guidelines recommend observation for asymptomatic umbilical hernias because approximately 80–90% close spontaneously by age 3 or 4. If the defect persists beyond **age 5**, the likelihood of spontaneous closure is minimal, and elective surgical repair (umbilical herniorrhaphy) is indicated to prevent future complications like incarceration or strangulation, which, though rare in children, increase in incidence as the patient reaches adulthood. **Analysis of Incorrect Options:** * **A (1 year) & B (3 years):** These are too early for asymptomatic cases. Operating at these ages would result in unnecessary surgery for many children whose hernias would have closed naturally. * **D (Need not be repaired):** While many close on their own, persistent hernias carry a lifetime risk of bowel entrapment and cosmetic distress; therefore, they require surgical intervention if they do not resolve by school age. **High-Yield Clinical Pearls for NEET-PG:** * **Indications for early surgery (before age 5):** 1. Evidence of **incarceration** or strangulation (Absolute indication). 2. Defect size **>1.5 cm to 2 cm** (unlikely to close spontaneously). 3. Symptomatic hernias (pain or skin changes). * **Associated Conditions:** Umbilical hernias are more common in premature infants, infants with Low Birth Weight (LBW), and conditions like **Down syndrome, Trisomy 13/18, and Congenital Hypothyroidism.** * **Management:** Unlike umbilical hernias, **Inguinal Hernias** in children never close spontaneously and should be repaired soon after diagnosis.

Question 1

What is the surgical treatment for duodenal atresia?

Accepted Answer

Duodenoduodenostomy

Answer

Roux-en-y procedure

Answer

Duodenojejunostomy

Answer

Duodenal canalization

Question 2

A 1-month-old infant presents with an umbilical hernia. The hernia is reducible but prolapses again almost immediately. What is true regarding this defect?

Accepted Answer

It is present in all children at birth.

Answer

It will not close spontaneously.

Answer

It should be repaired if still present at 3 months of age.

Answer

It should be repaired at this time if it is greater than 1 cm in diameter.

Question 3

Which of the following is NOT included in the criteria for assessing a child's condition?

Accepted Answer

Serum albumin

Answer

Nutritional status

Answer

Serum bilirubin

Answer

ALT / AST

Question 4

All of the following are suggestive of a low lesion in anorectal malformation except?

Accepted Answer

Meconuria

Answer

Bucket handle deformity

Answer

Midline raphe fistula

Answer

Perineal fistula

Question 5

A child presented with evisceration of bowel loops coming out of a defect in the abdominal wall to the right of the umbilicus. What is the possible diagnosis?

Accepted Answer

Gastroschisis

Answer

Exomphalos

Answer

Umbilical hernia

Answer

Patent urachus

Question 6

A 6-month-old child is brought to the clinic. The image shows the condition. What is the appropriate management protocol?

Accepted Answer

Surgery after 5 years

Answer

Indication of surgery if not resolved by 2 years

Answer

Immediate surgery

Answer

Hernioplasty

Question 7

Which of the following statements about posterior urethral valves in a neonate is true?

Accepted Answer

Bilateral hydronephrosis may be present.

Answer

Creatinine and urea levels remain normal.

Answer

They enlarge and widen the prostatic urethra.

Answer

They are more common in girls.

Question 8

A 9-month-old boy presents with scrotal swelling. Physical examination reveals a scrotal mass that can be transilluminated and is composed of clear serous fluid. What is the most appropriate diagnosis?

Accepted Answer

Hydrocele

Answer

Epididymitis

Answer

Hematocele

Answer

Spermatocele

Question 9

All of the following are false in the case of hypertrophic pyloric stenosis, EXCEPT?

Accepted Answer

Ultrasonography is the diagnostic test

Answer

Symptomatic within one week

Answer

Lump is always clinically palpable

Answer

Treatment of choice is Finney's pyloroplasty

Question 10

At what age should an asymptomatic umbilical hernia be repaired?

Accepted Answer

5 years

Answer

1 year

Answer

3 years

Answer

Need not be repaired

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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