Gastroenterology Practice Questions

Q: Which of the following is NOT true about neonatal hepatitis?

It is always associated with conjugated hyperbilirubinemia.. **Explanation:** **1. Why Option A is the correct (False) statement:** While neonatal hepatitis is a classic cause of **conjugated hyperbilirubinemia** (cholestasis), it is **not "always"** associated with it. In the very early stages of the disease or in specific metabolic/viral etiologies, the initial presentation may involve unconjugated hyperbilirubinemia before the cholestatic phase (conjugated) becomes clinically evident. In medical exams, absolute terms like "always" are often markers for incorrect statements. **2. Analysis of Incorrect Options (True statements):** * **Option B:** Neonatal hepatitis (especially idiopathic cases) shows a higher incidence in **preterm infants** and those with **IUGR**, likely due to the immaturity of the hepatobiliary system and susceptibility to insults. * **Option C:** Viral infections are a major cause. The **TORCH** group (Cytomegalovirus, Rubella, Herpes Simplex) and Hepatitis B are well-documented triggers of neonatal liver inflammation. * **Option D:** A positive family history is often present in cases caused by **metabolic disorders** (e.g., Alpha-1 antitrypsin deficiency, Galactosemia) or **familial intrahepatic cholestasis (PFIC)**, which can present clinically as neonatal hepatitis. **Clinical Pearls for NEET-PG:** * **Definition:** Neonatal hepatitis is defined by prolonged jaundice, conjugated hyperbilirubinemia, and hepatomegaly in the first 3 months of life. * **Histopathology:** The hallmark finding on liver biopsy is **Giant Cell Transformation** of hepatocytes. * **Differential Diagnosis:** The most critical distinction to make is between neonatal hepatitis and **Biliary Atresia**. * **HIDA Scan:** In neonatal hepatitis, the tracer will eventually reach the intestine (patent ducts), whereas in biliary atresia, there is no excretion into the bowel.

Q: For a neonate at 48 hours of age with a history of non-passage of meconium, what is the next step in evaluation?

Lower GI study. **Explanation:** The failure to pass meconium within the first 24–48 hours of life is a clinical red flag, most commonly associated with **Hirschsprung Disease (HD)** or **Meconium Ileus (MI)**. **Why Lower GI Study is the Correct Next Step:** A **Contrast Enema (Lower GI Study)** is the initial diagnostic imaging of choice. It serves two critical purposes: 1. **Diagnostic:** It helps differentiate between HD (showing a "transition zone" with a narrow distal segment and dilated proximal colon) and MI (showing a "microcolon" with pellet-like meconium). 2. **Therapeutic:** In cases of Meconium Ileus, water-soluble contrast (like Gastrografin) can help dissolve and flush out the inspissated meconium. **Analysis of Incorrect Options:** * **A & B (Sweat Chloride & CFTR Analysis):** While Meconium Ileus is the earliest manifestation of Cystic Fibrosis (CF), these tests are not the *immediate* next step. Sweat chloride is often unreliable in the first 48 hours due to low sweat rates in neonates, and genetic testing is a confirmatory step, not an initial evaluation for intestinal obstruction. * **D (Manometry):** Anorectal manometry is used to look for the absence of the Rectoanal Inhibitory Reflex (RAIR) in Hirschsprung Disease. However, it is technically difficult to perform and interpret in neonates and is usually reserved for older children or as a secondary investigation. **Clinical Pearls for NEET-PG:** * **Gold Standard for HD:** Rectal Suction Biopsy (showing absence of ganglion cells and hypertrophied nerve bundles). * **Most Common Site for HD:** Rectosigmoid region (Short-segment disease). * **X-ray finding:** "Target sign" or dilated bowel loops; however, a contrast enema provides more anatomical detail for surgical planning. * **Associated Syndrome:** Down Syndrome is frequently associated with Hirschsprung Disease.

Q: A previously healthy 5-year-old boy presented with a 4-day history of nausea, vomiting, and intermittent abdominal pain. On examination, he had mild periorbital edema. A computed tomography scan with contrast demonstrated specific findings. What is the diagnosis?

Menetrier's disease. ***Menetrier's disease*** - Characterized by **giant gastric rugal folds** and **protein-losing gastropathy**, leading to **hypoalbuminemia** and resulting **periorbital edema** as seen in this patient. - In children, it's often associated with **cytomegalovirus (CMV) infection** and presents with nausea, vomiting, and abdominal pain; **CT scan** shows characteristic **thickened gastric folds**. *Hyperplastic polyps* - These are **benign gastric polyps** that typically don't cause significant protein loss or systemic symptoms like periorbital edema. - Usually **asymptomatic** and discovered incidentally during endoscopy, not associated with the constellation of symptoms described. *Reflux gastropathy* - Results from **gastroesophageal reflux** causing mucosal inflammation, but doesn't typically cause **protein-losing gastropathy** severe enough to cause edema. - Symptoms are primarily **heartburn** and **regurgitation**, not the protein loss syndrome seen here. *Zollinger-Ellison syndrome* - Caused by **gastrinoma** leading to **excessive gastric acid production** and **peptic ulcer disease**, but doesn't cause protein-losing gastropathy. - More commonly presents with **recurrent peptic ulcers** and **diarrhea**, and is extremely rare in young children.

Q: A 6-year-old boy presents with a palpable abdominal mass in the epigastrium. There is no bile in the vomitus. What is the clinical diagnosis?

Pyloric stenosis. **Explanation:** The clinical presentation of a **palpable epigastric mass** combined with **non-bilious vomiting** is the classic hallmark of **Infantile Hypertrophic Pyloric Stenosis (IHPS)**. 1. **Why Pyloric Stenosis is correct:** In IHPS, hypertrophy of the pyloric sphincter muscle causes a functional gastric outlet obstruction. Because the obstruction is proximal to the Ampulla of Vater (where bile enters the duodenum), the vomitus is strictly **non-bilious**. The hypertrophied muscle is often palpable in the epigastrium or right upper quadrant as an **"olive-shaped mass."** While typically seen at 3–6 weeks of age, late presentations can occur. 2. **Why other options are incorrect:** * **Duodenal Atresia:** Characterized by **bilious vomiting** (as the block is usually distal to the bile duct) and the "double bubble" sign on X-ray. No palpable mass is typically present. * **Choledochal Cyst:** While it presents with a palpable mass in the right hypochondrium and jaundice (Todani’s triad), it does not typically cause gastric outlet obstruction or projectile vomiting. * **Oesophageal Atresia:** Presents immediately after birth with drooling, choking, and cyanosis during feeding. It does not present with an abdominal mass. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolic Abnormality:** Hypochloremic, hypokalemic, metabolic alkalosis with paradoxical aciduria. * **Investigation of Choice:** Ultrasonography (Criteria: Pyloric muscle thickness >4mm or length >14mm). * **Radiology Sign:** "String sign" or "Beak sign" on Barium swallow. * **Management:** Initial resuscitation with Normal Saline (0.9%) followed by **Ramstedt’s Pyloromyotomy**.

Q: What percentage of weight loss in infants constitutes severe dehydration?

>10% loss of body weight. Dehydration in infants is classified based on the percentage of body weight lost, as infants have a higher proportion of total body water and are more susceptible to rapid fluid depletion. **Explanation of the Correct Answer:** * **Option A (>10% loss):** In infants, **severe dehydration** is defined as a loss of **>10%** of their body weight. At this stage, clinical signs include sunken fontanelles, very slow skin pinch (>2 seconds), lethargy or unconsciousness, and signs of hypovolemic shock (tachycardia, hypotension, and feeble pulses). Immediate IV fluid resuscitation (Plan C) is required. **Explanation of Incorrect Options:** * **Option C (5% loss):** This constitutes **Mild Dehydration** (or "No Dehydration" according to WHO IMNCI classification if clinical signs are absent). The infant is usually alert, thirsty, and has moist mucous membranes. * **Options B & D (6-9% loss):** These fall into the category of **Moderate Dehydration** (Some Dehydration). This is typically defined as a **6–9%** weight loss. Clinical features include irritability, sunken eyes, and a skin pinch that goes back slowly. **High-Yield Clinical Pearls for NEET-PG:** * **Classification Shift:** While traditional textbooks use Mild (5%), Moderate (10%), and Severe (15%) for older children, for **infants**, the threshold for severe is **>10%**. * **WHO IMNCI Classification:** * **No Dehydration:** 10% weight loss. * **Gold Standard:** The most accurate way to assess the degree of dehydration is the **pre-illness weight minus the current weight**. * **Best Clinical Sign:** In clinical practice, **prolonged capillary refill time**, abnormal skin turgor, and abnormal respiratory patterns are the most reliable predictors of dehydration >5%.

Q: All of the following are true about Reye's syndrome, EXCEPT?

Good prognosis. **Explanation:** Reye’s syndrome is a rare but life-threatening condition characterized by **acute non-inflammatory encephalopathy** and **fatty degeneration of the liver**. **Why "Good prognosis" is the correct (False) statement:** The prognosis of Reye’s syndrome is generally **poor**, especially if not diagnosed early. It carries a high mortality rate (approximately 20–40%), and survivors often suffer from permanent neurological sequelae due to severe cerebral edema and increased intracranial pressure. **Analysis of other options:** * **Option A (Follows viral infection):** It typically occurs following a prodromal viral illness, most commonly **Influenza B** or **Varicella**. * **Option B (Associated with salicylate use):** There is a strong epidemiological link between the administration of **aspirin (salicylates)** during a viral illness and the development of Reye’s syndrome. This has led to the recommendation of using Acetaminophen/Ibuprofen instead for pediatric fever. * **Option C (Treated as for hepatic failure):** Management is supportive and mirrors that of acute liver failure, focusing on maintaining glucose levels (to prevent hypoglycemia) and aggressive management of **cerebral edema** (using mannitol, hyperventilation, or fluid restriction). **High-Yield Clinical Pearls for NEET-PG:** * **Pathophysiology:** Mitochondrial dysfunction leading to impaired fatty acid oxidation. * **Liver Biopsy Findings:** Characterized by **microvesicular steatosis** (small fat droplets) without significant inflammation or necrosis. * **Biochemical markers:** Elevated serum ammonia, prolonged PT/INR, and elevated AST/ALT, but notably, **bilirubin levels are usually normal or only mildly elevated** (unlike typical hepatitis). * **Drug of Choice for Fever in Children:** Paracetamol (to avoid Reye's).

Q: The following sign is seen in which of the following anomaly?

Duodenal atresia. ***Duodenal atresia*** - The **double bubble sign** on plain abdominal X-ray is **pathognomonic** for duodenal atresia, showing dilated stomach and duodenal bulb. - Complete obstruction occurs at the **second part of duodenum**, often associated with **Down syndrome** (trisomy 21). *Esophageal atresia* - Shows a **coiled nasogastric tube** in the upper esophageal pouch on chest X-ray, not abdominal findings. - Associated with **absent gastric air bubble** if isolated, and **VACTERL association** anomalies. *Tracheoesophageal fistula* - Presents with **aspiration pneumonia** and feeding difficulties, diagnosed with contrast studies. - May show **gastric distension** if H-type fistula, but lacks the characteristic double bubble appearance. *Large bowel obstruction* - Shows **multiple dilated bowel loops** with **air-fluid levels** throughout the abdomen on X-ray. - Causes include **Hirschsprung disease**, **meconium plug syndrome**, or **anorectal malformations** in neonates.

Question 1

Which of the following is NOT true about neonatal hepatitis?

Accepted Answer

It is always associated with conjugated hyperbilirubinemia.

Answer

It is more common in preterm or intra-uterine growth restriction babies.

Answer

It can be caused by viruses.

Answer

A positive family history may be present.

Question 2

A 10-day-old infant presents with projectile vomiting. His mother states that the infant will actively drink his milk, but he forcefully vomits after each feeding. The infant shows signs of failure to thrive, with weight loss, dehydration, and lethargy. Physical examination reveals a firm, nontender, mobile, "olive-shaped" epigastric mass. Which of the following is the most likely diagnosis?

Accepted Answer

Congenital pyloric stenosis

Answer

Candida esophagitis

Answer

Esophageal cancer

Answer

GERD

Question 3

A 5-year-old child presents with watery diarrhea for 7 days. On examination, the child's weight is 10 kg and shows hanging skin folds with a normal skin pinch. What should be the sodium concentration in the oral rehydration solution (ORS)?

Accepted Answer

75 mEq/L

Answer

45 mEq/L

Answer

60 mEq/L

Answer

90 mEq/L

Question 4

For a neonate at 48 hours of age with a history of non-passage of meconium, what is the next step in evaluation?

Accepted Answer

Lower GI study

Answer

Sweat chloride level

Answer

CFTR mutation analysis

Answer

Manometry

Question 5

A previously healthy 5-year-old boy presented with a 4-day history of nausea, vomiting, and intermittent abdominal pain. On examination, he had mild periorbital edema. A computed tomography scan with contrast demonstrated specific findings. What is the diagnosis?

Accepted Answer

Menetrier's disease

Answer

Hyperplastic polyps

Answer

Reflux gastropathy

Answer

Zollinger-Ellison syndrome

Question 6

A 6-year-old boy presents with a palpable abdominal mass in the epigastrium. There is no bile in the vomitus. What is the clinical diagnosis?

Accepted Answer

Pyloric stenosis

Answer

Duodenal Atresia

Answer

Choledochal cyst

Answer

Oesophageal Atresia

Question 7

In children, the presence of increased fecal fat excretion and increased fecal nitrogen levels is a feature of all the following conditions except?

Accepted Answer

Ulcerative colitis

Answer

Pancreatic insufficiency

Answer

Bacterial overgrowth syndrome

Answer

Celiac disease

Question 8

What percentage of weight loss in infants constitutes severe dehydration?

Accepted Answer

>10% loss of body weight

Answer

>6% loss of body weight

Answer

5% loss of body weight

Answer

7% loss of body weight

Question 9

All of the following are true about Reye's syndrome, EXCEPT?

Accepted Answer

Good prognosis

Answer

Follows viral infection

Answer

Associated with salicylate use

Answer

Should be treated as for hepatic failure

Question 10

The following sign is seen in which of the following anomaly?

Accepted Answer

Duodenal atresia

Answer

Esophageal atresia

Answer

Tracheoesophageal fistula

Answer

Large bowel obstruction

Gastroenterology — MCQs

Gastroenterology — MCQs

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