Gastroenterology Practice Questions

Q: Celiac disease is associated with which of the following conditions?

Dermatitis herpetiformis. **Explanation:** Celiac disease (Gluten-sensitive enteropathy) is an immune-mediated inflammatory disorder of the small intestine triggered by the ingestion of gluten [1]. **Why Dermatitis Herpetiformis (DH) is the correct answer:** Dermatitis herpetiformis is considered the **cutaneous manifestation of Celiac disease**. It is characterized by intensely pruritic, symmetric, papulovesicular eruptions typically found on the extensor surfaces (elbows, knees, buttocks). The underlying pathophysiology involves **IgA deposits** in the dermal papillae. Nearly 100% of patients with DH have underlying gluten-sensitive enteropathy, though they may be asymptomatic gastrointestinally. **Analysis of other options:** * **Type 1 Diabetes Mellitus (T1DM):** While T1DM is strongly associated with Celiac disease (both share the **HLA-DQ2/DQ8** genotype), it is considered a comorbid autoimmune condition rather than a direct manifestation or the most pathognomonic association in the context of classic board questions [1]. * **Lymphoma:** Celiac disease significantly increases the risk of **Enteropathy-associated T-cell lymphoma (EATL)**, especially in refractory cases. However, it is a complication rather than a primary associated condition like DH. * **Atrophic Gastritis:** This is typically associated with Pernicious Anemia (Type A gastritis) or *H. pylori* infection, not Celiac disease. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** Strong association with **HLA-DQ2** (95%) and **HLA-DQ8** [1]. * **Serology:** **Anti-tissue Transglutaminase (anti-tTG) IgA** is the best screening test; **Anti-Endomysial antibody (EMA)** is the most specific [1]. * **Biopsy Gold Standard:** Shows villous atrophy, crypt hyperplasia, and increased intraepithelial lymphocytes (Marsh Classification) [1]. * **Treatment:** Lifelong gluten-free diet (GFD). Dapsone is used for symptomatic relief of DH, but GFD is the definitive treatment [1].

Q: Which of the following is NOT a cause of secondary achalasia?

Kala azar. **Explanation:** Achalasia cardia is characterized by the failure of the lower esophageal sphincter (LES) to relax and the absence of esophageal peristalsis [1]. While primary achalasia is idiopathic, **secondary achalasia (Pseudoachalasia)** occurs when an extrinsic process or systemic disease mimics the clinical and manometric features of the primary disorder [2]. **Why Kala-azar is the correct answer:** **Kala-azar (Visceral Leishmaniasis)** is caused by *Leishmania donovani* [3]. It primarily affects the reticuloendothelial system (spleen, liver, bone marrow) [3]. It does **not** involve the destruction of the myenteric (Auerbach’s) plexus of the esophagus and, therefore, is not a cause of achalasia. **Analysis of Incorrect Options:** * **Chagas Disease:** Caused by *Trypanosoma cruzi*, this is a classic cause of secondary achalasia. The parasite directly destroys the inhibitory neurons in the myenteric plexus, leading to "megaesophagus." * **Allgrove’s Syndrome (Triple A Syndrome):** A rare genetic condition characterized by **A**chalasia, **A**lacrimia (absence of tears), and **A**CTH-resistant adrenal insufficiency. * **Multiple Endocrine Neoplasia (MEN 2B):** This syndrome is associated with mucosal neuromas and ganglioneuromatosis of the gastrointestinal tract, which can disrupt normal esophageal motility and lead to secondary achalasia. **NEET-PG High-Yield Pearls:** 1. **Most common cause of pseudoachalasia worldwide:** Gastric carcinoma (via direct infiltration of the LES or paraneoplastic effect). 2. **Gold Standard Investigation:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis) [1]. 3. **Barium Swallow Finding:** "Bird’s beak" appearance or "Rat-tail" appearance. 4. **Heller’s Myotomy:** The surgical treatment of choice, usually performed with a partial fundoplication to prevent GERD.

Q: Portal hypertension is a complication of cirrhosis of the liver in all of the following except?

Gilbert's syndrome. The correct answer is **Gilbert’s syndrome**. **1. Why Gilbert’s syndrome is the correct answer:** Gilbert’s syndrome is a benign, autosomal recessive (or dominant) condition characterized by a mild deficiency of the enzyme **UDP-glucuronosyltransferase (UGT1A1)** [1, 3]. This leads to isolated unconjugated hyperbilirubinemia. Crucially, Gilbert’s syndrome **does not cause inflammation, fibrosis, or cirrhosis** of the liver [1]. Since the liver architecture remains normal, there is no resistance to blood flow, and thus, portal hypertension does not occur. **2. Why the other options are incorrect:** * **Wilson’s Disease:** This is a disorder of copper metabolism. Chronic copper deposition in the liver leads to chronic hepatitis, which progresses to macronodular cirrhosis and subsequent portal hypertension [3]. * **Hemochromatosis:** This involves excessive iron deposition (hemosiderin) in hepatocytes. This "bronze" cirrhosis causes structural damage and fibrosis, leading to portal hypertension. * **Hepatitis C:** Chronic infection with the Hepatitis C virus (HCV) is one of the leading causes of post-necrotic cirrhosis worldwide. The resulting architectural distortion of the liver lobules is a classic cause of portal hypertension. **Clinical Pearls for NEET-PG:** * **Gilbert’s Syndrome Trigger:** Jaundice is typically precipitated by stress, fasting, or infection [1]. * **Definition of Portal Hypertension:** A hepatic venous pressure gradient (HVPG) **> 5 mmHg**. Clinical complications (varices, ascites) usually appear when HVPG **≥ 10-12 mmHg** [4]. * **Most Common Cause:** In India and globally, cirrhosis (sinusoidal obstruction) is the most common cause of portal hypertension. * **Rule of Thumb:** If a liver condition is "isolated hyperbilirubinemia" (Gilbert’s, Crigler-Najjar, Dubin-Johnson, Rotor), it generally does **not** cause cirrhosis or portal hypertension [2].

Q: How is Celiac sprue definitively diagnosed?

Unequivocal response to gluten restriction. **Explanation:** The definitive diagnosis of Celiac disease (Gluten-sensitive enteropathy) relies on the demonstration of clinical and histological improvement following the strict removal of gluten from the diet [1]. **1. Why the correct answer is right:** While serology (Anti-tTG, Anti-endomysial antibodies) and intestinal biopsy (showing villous atrophy, crypt hyperplasia, and increased intraepithelial lymphocytes) are essential diagnostic steps [1], the **"Gold Standard"** for confirmation is an **unequivocal clinical and histological response to a gluten-free diet (GFD)**. This confirms that gluten was indeed the causative agent of the enteropathy. **2. Why the other options are wrong:** * **A. CT scan:** Imaging is non-specific. While it may show dilated bowel loops or "moulage sign," it cannot diagnose microscopic mucosal changes or gluten sensitivity. * **C. Finding of an organism:** This would point toward **Tropical Sprue** or **Whipple’s Disease** (*Tropheryma whipplei*) [2], not Celiac sprue, which is an autoimmune-mediated response to gliadin [1]. * **D. Improvement on dapsone:** Dapsone is the treatment of choice for **Dermatitis Herpetiformis** (the skin manifestation of Celiac), but it does not treat the underlying intestinal malabsorption or define the diagnosis of the sprue itself. **NEET-PG High-Yield Pearls:** * **HLA Association:** Strongly linked to **HLA-DQ2** (95%) and **HLA-DQ8** [1]. * **Best Screening Test:** IgA Anti-tissue Transglutaminase (tTG) antibody. * **Biopsy Site:** Multiple biopsies from the **second part of the duodenum** or distal duodenum. * **Marsh Classification:** Used to grade the severity of histological changes. * **Associated Malignancy:** Increased risk of **Enteropathy-associated T-cell lymphoma (EATL)**.

Q: All of the following are hypomotility disorders of the esophagus except?

Nutcracker esophagus. **Explanation:** The core concept in esophageal motility disorders is distinguishing between **hypomotility** (decreased or absent contraction) and **hypermotility** (excessive or high-pressure contraction). **Why Nutcracker Esophagus is the Correct Answer:** Nutcracker esophagus (also known as Jackhammer esophagus or Hypertensive Peristalsis) is a **hypermotility disorder**. It is characterized by high-amplitude peristaltic contractions (typically >180 mmHg) that are coordinated but excessively forceful. Because it involves "over-activity" rather than "under-activity," it is not a hypomotility disorder. **Analysis of Incorrect Options (Hypomotility Disorders):** * **Achalasia Cardia:** Characterized by the absence of peristalsis (aperistalsis) in the distal esophagus and failure of the Lower Esophageal Sphincter (LES) to relax. The lack of contraction makes it a classic hypomotility state. * **Scleroderma (Systemic Sclerosis):** Leads to smooth muscle atrophy and fibrosis of the distal two-thirds of the esophagus. This results in profound aperistalsis and a hypotensive LES, making it a severe hypomotility disorder. * **Gastroesophageal Reflux (GERD):** Chronic GERD is frequently associated with "Ineffective Esophageal Motility" (IEM), where low-amplitude or failed contractions occur, leading to poor bolus clearance. **NEET-PG High-Yield Pearls:** * **Gold Standard Investigation:** High-Resolution Manometry (HRM) is the investigation of choice for all motility disorders. * **Nutcracker Esophagus Clinical Presentation:** Presents with non-cardiac chest pain and odynophagia; manometry shows pressures >180–220 mmHg. * **Scleroderma Triad:** Aperistalsis, low LES pressure, and reflux esophagitis (often leading to Barrett’s). * **Bird’s Beak Appearance:** Classic radiological finding in Achalasia Cardia on Barium Swallow.

Q: Which of the following statements about acute hepatitis is true?

Anti-HCV antibodies are never present in 10% of cases.. The correct answer is **Option B**. In approximately **10% of acute Hepatitis C (HCV) cases**, anti-HCV antibodies are never detectable during the acute phase of the illness. This occurs because the "window period" for antibody seroconversion can be prolonged (averaging 7–8 weeks) [1]. In these patients, the diagnosis must be confirmed by detecting **HCV RNA** using PCR, which is the earliest marker of infection [1]. **Analysis of Incorrect Options:** * **Option A:** Worldwide, **Genotype 1** is the most prevalent HCV genotype (approx. 46%), followed by Genotype 3 [1]. In India, Genotype 3 is the most common. * **Option C:** While HEV is a major cause of epidemics in developing countries, **Hepatitis A (HAV)** is globally the most common cause of acute viral hepatitis, especially in the pediatric population [2]. * **Option D:** HAV is significantly **more common in children** [2]. In endemic areas like India, most children are exposed early in life, often resulting in asymptomatic or mild infections, leading to lifelong immunity before reaching adulthood. **High-Yield Clinical Pearls for NEET-PG:** * **HCV Diagnosis:** HCV RNA is the gold standard for diagnosing acute infection; Anti-HCV indicates exposure but cannot distinguish between acute, chronic, or resolved infection [1]. * **HEV & Pregnancy:** HEV carries a high mortality rate (up to 20%) in pregnant women, particularly in the third trimester, due to fulminant hepatic failure. * **Hepatitis B:** The first serological marker to appear is **HBsAg**, while the first antibody to appear is **Anti-HBc (IgM)**.

Q: A 40-year-old male presented with watery diarrhea. Stool cytotoxin assay was positive. Colonoscopy revealed ulcers, plaques, and pseudomembranes. The patient's condition improved significantly with metronidazole. The provided CECT shows a characteristic sign. What is the name of this sign seen on CECT?

Accordion sign. ***Accordion sign*** - The **accordion sign** on CECT represents **oral contrast trapped between thickened, edematous haustra** in **pseudomembranous colitis**, creating alternating bands of high and low attenuation resembling an accordion. - This sign is **pathognomonic for C. difficile colitis** and correlates with severe mucosal inflammation and **pseudomembrane formation** seen on colonoscopy. *Central stellate scar* - This is a characteristic finding of **focal nodular hyperplasia (FNH)** of the liver, showing a **central fibrous scar** with radiating septa. - It has no association with **colonic pathology** or **C. difficile infection**. *Whorl sign* - The **whorl sign** is seen in **intestinal volvulus**, particularly **sigmoid volvulus**, showing a **twisted bowel loop** with a characteristic spiral appearance. - It indicates **mechanical bowel obstruction**, not infectious colitis with **pseudomembrane formation**. *Honeycombing* - **Honeycombing** is a **pulmonary imaging finding** seen in **end-stage pulmonary fibrosis**, showing clustered cystic spaces in subpleural regions. - It is completely unrelated to **gastrointestinal pathology** and **C. difficile colitis**.

Q: Poor prognostic factors for acute pancreatitis are all, EXCEPT:

Hyperamylasemia. **Explanation:** In acute pancreatitis, the **severity of the disease does not correlate with the magnitude of serum amylase or lipase elevation.** While hyperamylasemia is a diagnostic hallmark, it has no prognostic value. A patient with mild interstitial pancreatitis may have amylase levels >3000 U/L, while a patient with severe necrotizing pancreatitis may have near-normal levels due to extensive pancreatic destruction or hypertriglyceridemia. **Analysis of Options:** * **Hyperamylasemia (Correct Answer):** As stated, it is useful for diagnosis (if >3x upper limit) but does not predict complications or mortality. * **Hyperglycemia:** Included in the **Ranson Criteria** (>200 mg/dL) and **APACHE II** scores. It reflects endocrine pancreatic dysfunction and systemic stress. * **Hypocalcemia:** A sign of severe disease (Ranson’s: 350 IU/L). **Clinical Pearls for NEET-PG:** 1. **Ranson Criteria:** Assessed at admission and 48 hours. Remember the mnemonic **GAWBE** (Glucose, Age, WBC, AST, LDH) for admission. 2. **BISAP Score:** (BUN, Impaired mental status, SIRS, Age >60, Pleural effusion) is a rapid bedside tool. 3. **Most Accurate Marker:** Contrast-Enhanced CT (CECT) is the gold standard for assessing necrosis (best done after 72 hours). 4. **Early Prognosis:** Rising **Hematocrit** (indicating hemoconcentration) and **BUN** are the most reliable early indicators of poor prognosis.

Question 1

Celiac disease is associated with which of the following conditions?

Accepted Answer

Dermatitis herpetiformis

Answer

Type 1 Diabetes Mellitus

Answer

Lymphoma

Answer

Atrophic gastritis

Question 2

Which of the following is NOT a cause of secondary achalasia?

Accepted Answer

Kala azar

Answer

Allgrove's Syndrome

Answer

Multiple endocrine neoplasia

Answer

Chaga's disease

Question 3

A young patient presenting with massive hematemesis was found to have splenomegaly. What is the most likely source of bleeding?

Accepted Answer

Esophageal varices

Answer

Duodenal ulcer

Answer

Erosive mucosal disease

Answer

Gastric ulcer

Question 4

Portal hypertension is a complication of cirrhosis of the liver in all of the following except?

Accepted Answer

Gilbert's syndrome

Answer

Wilson's disease

Answer

Hemochromatosis

Answer

Hepatitis C

Question 5

How is Celiac sprue definitively diagnosed?

Accepted Answer

Unequivocal response to gluten restriction

Answer

CT scan

Answer

Finding of an organism

Answer

Improvement on dapsone treatment

Question 6

A 55-year-old woman presents with a 3-year history of recurrent chest pain, unrelated to exertion. She reports a sensation of food getting stuck in her chest, occasional nocturnal cough, and regurgitation. A chest X-ray during an episode revealed a widened mediastinum. She denies other bowel problems or abdominal pain. A trial of proton pump inhibitors (PPI) provided no relief. What is the most appropriate diagnostic test to confirm the underlying condition?

Accepted Answer

Esophageal motility study

Answer

Barium swallow study

Answer

CT scan of the thorax with biopsy

Answer

Endoscopy with biopsy

Question 7

All of the following are hypomotility disorders of the esophagus except?

Accepted Answer

Nutcracker esophagus

Answer

Achalasia cardia

Answer

Gastroesophageal reflux

Answer

Scleroderma

Question 8

Which of the following statements about acute hepatitis is true?

Accepted Answer

Anti-HCV antibodies are never present in 10% of cases.

Answer

In Hepatitis C virus (HCV) infection, genotypes 2 and 3 are the most prevalent worldwide.

Answer

Hepatitis E virus (HEV) is the commonest cause of acute hepatitis.

Answer

Hepatitis A virus (HAV) is more common in adults than in children.

Question 9

A 40-year-old male presented with watery diarrhea. Stool cytotoxin assay was positive. Colonoscopy revealed ulcers, plaques, and pseudomembranes. The patient's condition improved significantly with metronidazole. The provided CECT shows a characteristic sign. What is the name of this sign seen on CECT?

Accepted Answer

Accordion sign

Answer

Central stellate scar

Answer

Whorl sign

Answer

Honeycombing

Question 10

Poor prognostic factors for acute pancreatitis are all, EXCEPT:

Accepted Answer

Hyperamylasemia

Answer

Hyperglycemia

Answer

Hypocalcemia

Answer

Raised LDH levels in blood

Gastroenterology — MCQs

Gastroenterology — MCQs

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