Pediatric Surgery Practice Questions

Q: A 3-year-old child presents with scrotal swelling since birth. The transillumination test is positive. Which of the following is NOT true?

A 'bag of worms' sign is present.. **Explanation:** The clinical presentation of a 3-year-old with scrotal swelling since birth and a **positive transillumination test** is diagnostic of a **Congenital Hydrocele**. In children, this is almost always a "communicating" hydrocele caused by a patent processus vaginalis (PPV). **Why Option B is the Correct Answer (NOT true):** The **'bag of worms' sign** is the classic clinical description for a **Varicocele** (dilated pampiniform plexus of veins). Varicoceles typically present in adolescent or adult males, are usually left-sided, do not transilluminate, and feel like a cluster of noodles. They are not associated with congenital hydroceles. **Analysis of Other Options:** * **Option A (True):** The definitive treatment for a persistent congenital hydrocele in a child is **Herniotomy** (high ligation of the patent processus vaginalis). Unlike adults, where a hydrocelectomy (Jaboulay’s procedure) is done via a scrotal approach, pediatric cases require an inguinal approach to close the communication with the peritoneum. * **Option C (True):** The **'Silk Glove Sign'** is a classic physical finding in children with a patent processus vaginalis. It is the sensation of two layers of silk rubbing together when the spermatic cord is palpated at the pubic tubercle. * **Option D (True):** A painless, fluctuant, transilluminating swelling in a toddler is the hallmark of a hydrocele. **NEET-PG High-Yield Pearls:** 1. **Management Timing:** Most congenital hydroceles resolve spontaneously by **1–2 years of age**. Surgery (Herniotomy) is indicated if it persists beyond this age or if a clinical hernia is present. 2. **Anatomy:** The pediatric hydrocele is a **communicating** type; the adult type is usually **non-communicating** (vaginal). 3. **Transillumination:** Positive in hydrocele and meningocele; negative in incarcerated hernia and varicocele.

Q: What is the most sensitive investigation for the diagnosis of Meckel's diverticulum?

99m-Tc pertechnetate scan. **Explanation:** Meckel’s diverticulum is the most common congenital anomaly of the gastrointestinal tract, resulting from the failure of the vitelline duct to obliterate. **Why the Correct Answer is Right:** The **99m-Tc pertechnetate scan (Meckel’s scan)** is the investigation of choice and the most sensitive test for diagnosing a symptomatic Meckel’s diverticulum. The underlying principle is that 99m-Tc pertechnetate has a high affinity for **gastric mucosa**. Since approximately 50-60% of symptomatic Meckel’s diverticula contain **ectopic gastric mucosa**, the isotope concentrates in the diverticulum, appearing as a "hot spot" on scintigraphy. Its sensitivity is further increased by using pharmacological adjuncts like H2 blockers (cimetidine), glucagon, or pentagastrin. **Why Other Options are Incorrect:** * **Ultrasonography (USG):** While useful for identifying complications like intussusception or inflammatory masses, it lacks the sensitivity to reliably visualize an uncomplicated Meckel’s diverticulum. * **CT Scan:** Often used in acute abdominal pain, it may show a "blind-ending pouch," but it is frequently non-specific and can miss the diverticulum unless it is inflamed (Meckel’s diverticulitis). * **Barium Enema:** This is primarily used for diagnosing large bowel pathologies or reducing intussusception. It rarely refluxes far enough into the ileum to visualize a Meckel’s diverticulum. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 2s:** 2% of the population, 2 inches long, 2 feet from the ileocecal valve, 2 types of ectopic tissue (Gastric > Pancreatic), and presents before age 2. * **Most common presentation:** Painless lower GI bleeding (hematochezia) in children; intestinal obstruction in adults. * **Treatment:** Surgical resection (diverticulectomy or wedge resection) is indicated for symptomatic cases.

Q: What is the most probable diagnosis in a newborn baby presenting with regurgitation of feeds and continuous drooling of saliva?

Esophageal atresia. **Explanation:** The clinical presentation of a newborn with **continuous drooling of saliva** (excessive salivation) and **regurgitation of the first feed** is the classic triad for **Esophageal Atresia (EA)**. In EA, the esophagus ends in a blind pouch; therefore, the infant cannot swallow saliva, leading to it pooling in the oropharynx and spilling out (drooling). When feeding is attempted, the milk has no passage to the stomach, resulting in immediate regurgitation and potential aspiration. **Analysis of Incorrect Options:** * **Diffuse Esophageal Spasm (DES):** This is a motility disorder characterized by uncoordinated contractions. It typically presents in adults with chest pain and intermittent dysphagia, not as a neonatal emergency. * **Achalasia Cardia:** This involves the failure of the Lower Esophageal Sphincter (LES) to relax. While it causes regurgitation, it is extremely rare in newborns and usually presents later in childhood with progressive dysphagia. * **Zenker’s Diverticulum:** This is a herniation of the mucosa through Killian’s dehiscence. It is a disease of the elderly (typically >60 years) and does not occur in the neonatal period. **NEET-PG High-Yield Pearls:** * **Most Common Type:** Type C (Esophageal Atresia with Distal Tracheoesophageal Fistula) is the most common (85%). * **Initial Diagnostic Step:** Attempting to pass a stiff, radio-opaque **Nasogastric (NG) tube**; it will meet resistance and "coil" in the upper pouch (visible on X-ray). * **Associated Anomalies:** Always screen for **VACTERL** syndrome (Vertebral, Anal, Cardiac, TEF, Renal, and Limb anomalies). * **Antenatal Clue:** Maternal polyhydramnios (due to the fetus's inability to swallow amniotic fluid).

Q: After a single episode of painless gross hematuria in a boy, an excretory urogram showed a 1.5 cm filling defect towards the lower renal infundibulum. What is the next investigation to be done?

USG. **Explanation:** The primary goal in evaluating a filling defect on an Excretory Urogram (IVP) is to differentiate between a **radiolucent calculus**, a **soft tissue mass**, or a **blood clot**. 1. **Why USG is the correct next step:** Ultrasonography (USG) is the most cost-effective, non-invasive, and rapid investigation to characterize a filling defect. It can easily distinguish between a solid mass (like a fibroepithelial polyp or tumor) and a stone (which will be hyperechoic with posterior acoustic shadowing). In a pediatric patient, USG is preferred to avoid unnecessary radiation and to guide further management. 2. **Why other options are incorrect:** * **Cystoscopy:** While useful for evaluating the bladder and lower urinary tract, it cannot visualize the renal infundibulum or characterize a filling defect within the kidney. * **Urine Cytology:** This has low sensitivity for upper tract lesions and is generally used for suspected urothelial malignancies (TCC), which are extremely rare in children. * **Retrograde Pyelography (RGP):** This is an invasive procedure. While it provides excellent anatomical detail of the collecting system, it is usually reserved for cases where IVP/USG are inconclusive or when planning surgery. **Clinical Pearls for NEET-PG:** * **Filling Defect Differential:** Remember the mnemonic **"Blood, Stone, Tumor"** (Blood clot, Radiolucent stone—Uric acid/Cystine, or Urothelial tumor). * **Pediatric Hematuria:** In children, a persistent filling defect in the infundibulum/pelvis without evidence of a stone often points toward a **Fibroepithelial Polyp**, the most common benign tumor of the upper urinary tract in children. * **Gold Standard:** While USG is the *next* step, **NCCT (Non-Contrast CT)** is the gold standard for identifying radiolucent stones.

Q: Which of the following statements regarding hypertrophic pyloric stenosis is TRUE?

Ultrasonography is the diagnostic test of choice.. ### Explanation **Hypertrophic Pyloric Stenosis (HPS)** is a common cause of gastric outlet obstruction in infants, characterized by hypertrophy of the circular muscle of the pylorus. **Why Option D is Correct:** **Ultrasonography (USG)** is the gold standard and diagnostic test of choice due to its high sensitivity and specificity. It is non-invasive and avoids radiation. Diagnostic criteria include a **pyloric muscle thickness >3 mm** and a **pyloric channel length >14 mm**. **Why the Other Options are Incorrect:** * **Option A:** Symptoms typically appear between **3 to 6 weeks of life**. It is rarely present at birth or within the first week, making "first week" clinically inaccurate. * **Option B:** While a "palpable olive-shaped mass" is a classic physical finding, it is **not always present** (palpable in about 60-80% of cases). Its absence does not rule out the diagnosis. * **Option C:** The surgical treatment of choice is **Ramstedt’s Pyloromyotomy** (longitudinal incision of the pylorus muscle while keeping the mucosa intact). Finney’s pyloroplasty is a reconstructive procedure used for different indications in adults. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** Non-bilious, projectile vomiting in a "hungry" infant. * **Metabolic Abnormality:** Hypochloremic, hypokalemic, metabolic alkalosis with **paradoxical aciduria** (a favorite MCQ topic). * **Radiology Sign:** On Barium swallow (if USG is inconclusive), look for the **"String sign"** or "Beak sign." * **Priority:** HPS is a **medical emergency**, not a surgical one. Electrolyte and fluid resuscitation (using Normal Saline) must be completed *before* the patient is taken to surgery.

Q: Malrotation presents with which of the following features?

Bleeding per rectum and bilious vomiting. **Explanation:** **Malrotation with Midgut Volvulus** is a surgical emergency in neonates. The core pathology involves a narrow mesenteric base (due to the failure of normal 270° counter-clockwise rotation), which allows the entire midgut to twist around the **Superior Mesenteric Artery (SMA)**. 1. **Why Option B is Correct:** * **Bilious Vomiting:** This is the hallmark of malrotation. The twisting (volvulus) causes extrinsic compression of the third part of the duodenum by **Ladd’s bands**, leading to high intestinal obstruction. * **Bleeding per Rectum:** As the volvulus progresses, it compromises the venous and eventually the arterial supply (SMA), leading to bowel ischemia, mucosal sloughing, and "currant jelly" or bloody stools. The combination of these two signs indicates life-threatening gangrene. 2. **Why Other Options are Incorrect:** * **Mass Abdomen (Options A & C):** A palpable abdominal mass is characteristic of **Intussusception** (sausage-shaped mass) or **Pyloric Stenosis** (olive-shaped mass), but is typically absent in malrotation. * **Hematemesis (Option D):** While possible in late-stage ischemia, it is not a classic or defining feature compared to bilious vomiting and rectal bleeding. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Upper GI Contrast Study (Barium Swallow) showing the **"Corkscrew appearance"** of the duodenum. * **Ultrasound Finding:** "Whirlpool sign" (vessels wrapping around the SMA). * **Surgical Management:** **Ladd’s Procedure** (Counter-clockwise detorsion, division of Ladd’s bands, widening the mesenteric base, and appendectomy). * **Rule of Thumb:** Any neonate with bilious vomiting is malrotation until proven otherwise.

Q: Undescended testis can lead to all of the following complications except:

Hypertrophy of testes. **Explanation:** The correct answer is **Hypertrophy of testes**. In cases of cryptorchidism (undescended testis), the affected testis is typically **atrophic** (small and soft) rather than hypertrophied. This is due to the higher intra-abdominal temperature, which leads to the degeneration of germinal epithelium and peritubular fibrosis. While the contralateral descended testis may undergo compensatory hypertrophy, the undescended testis itself does not. **Analysis of Incorrect Options:** * **Torsion:** Undescended testes are more prone to torsion because they often lack the normal posterior attachment to the scrotum (gubernaculum abnormality) and are frequently associated with a patent processus vaginalis, allowing for increased mobility. * **Sterility:** The higher temperature of the inguinal canal or abdomen inhibits spermatogenesis. While Leydig cells (testosterone production) are relatively resistant, the Sertoli cells and germ cells are damaged, leading to infertility, especially in bilateral cases. * **Carcinoma:** There is a 10–40 times higher risk of germ cell tumors (most commonly **Seminoma**) in undescended testes. Orchiopexy does not eliminate the risk of malignancy but makes the testis accessible for clinical examination and screening. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Inguinal canal. * **Most common complication:** Inguinal hernia (associated with patent processus vaginalis in 90% of cases). * **Most common tumor:** Seminoma (overall); however, if the testis remains intra-abdominal, the risk of Seminoma is significantly higher. * **Timing of Surgery:** Orchiopexy is ideally performed between **6 to 12 months** of age to preserve fertility potential. * **Investigation of choice:** Ultrasonography (initial); Diagnostic Laparoscopy (Gold Standard for impalpable testes).

Question 1

A 3-year-old child presents with scrotal swelling since birth. The transillumination test is positive. Which of the following is NOT true?

Accepted Answer

A 'bag of worms' sign is present.

Answer

Herniotomy is indicated.

Answer

A silk glove sign is present.

Answer

The condition is likely a hydrocele.

Question 2

What is the most sensitive investigation for the diagnosis of Meckel's diverticulum?

Accepted Answer

99m-Tc pertechnetate scan

Answer

Ultrasonography (USG)

Answer

CT Scan

Answer

Barium enema

Question 3

A 4-year-old boy is seen 1 hour after ingesting a lye drain cleaner. No oropharyngeal burns are noted, but the patient's voice is hoarse. Chest x-ray is normal. Which of the following is the most appropriate therapy?

Accepted Answer

Parenteral steroids and antibiotics

Answer

Immediate esophagoscopy

Answer

Administration of an oral neutralizing agent

Answer

Induction of vomiting

Question 4

A neonate presents with a smooth, transparent, fluctuating inguinal swelling that extends into the inguinal canal and receives an impulse when the child coughs or struggles. Congenital hydrocele is diagnosed after examination. What is the suggested treatment modality in this case?

Accepted Answer

Herniotomy

Answer

No treatment before 5 years

Answer

Herniorraphy

Answer

Eversion of sac

Question 5

What is the most probable diagnosis in a newborn baby presenting with regurgitation of feeds and continuous drooling of saliva?

Accepted Answer

Esophageal atresia

Answer

Diffuse esophageal spasm

Answer

Achalasia cardia

Answer

Zenker's diverticulum

Question 6

After a single episode of painless gross hematuria in a boy, an excretory urogram showed a 1.5 cm filling defect towards the lower renal infundibulum. What is the next investigation to be done?

Accepted Answer

USG

Answer

Cystoscopy

Answer

Urine cytology

Answer

Retrograde pyelography

Question 7

Which of the following statements regarding hypertrophic pyloric stenosis is TRUE?

Accepted Answer

Ultrasonography is the diagnostic test of choice.

Answer

Symptoms typically appear within the first week of life.

Answer

A palpable pyloric tumor is always present.

Answer

The treatment of choice is Finney's pyloroplasty.

Question 8

A meningomyelocele patient developed hydrocephalus after surgery. What is the most likely cause?

Accepted Answer

Arnold-Chiari malformation

Answer

Injury to the absorptive surface

Answer

Central canal injury

Answer

Arachnoidal block

Question 9

Malrotation presents with which of the following features?

Accepted Answer

Bleeding per rectum and bilious vomiting

Answer

Mass abdomen and bleeding per rectum

Answer

Mass abdomen and bilious vomiting

Answer

Bilious vomiting and hematemesis

Question 10

Undescended testis can lead to all of the following complications except:

Accepted Answer

Hypertrophy of testes

Answer

Torsion

Answer

Sterility

Answer

Carcinoma

Pediatric Surgery — MCQs

Pediatric Surgery — MCQs

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