Gastroenterology Practice Questions

Q: A 45-year-old man with a history of chronic alcoholism presents to the emergency department with hematemesis. He denies any prior symptoms of nausea, vomiting, or NSAID use. On examination, his blood pressure is 94/73 mm Hg, heart rate is 110/min, and he has signs of chronic liver disease. Following resuscitation with IV fluids, urgent endoscopy reveals findings suggestive of a specific diagnosis. Which of the following is the most likely diagnosis?

Esophageal varices. ***Esophageal varices*** - **Chronic alcoholism** leads to **cirrhosis** and **portal hypertension**, causing **collateral circulation** through esophageal veins that become **dilated varices**. - **Hematemesis** with **hypotension** and **tachycardia** in a patient with **signs of chronic liver disease** strongly suggests **variceal bleeding**, which is a life-threatening emergency. *Esophageal carcinoma* - Typically presents with **progressive dysphagia** and **weight loss** over months, not acute hematemesis. - More common in patients with **smoking history** or **Barrett's esophagus**, and usually affects older patients without necessarily having liver disease. *Foreign body* - Would have a clear **history of ingestion** and typically causes **odynophagia** or **chest pain**. - **Hematemesis** from foreign bodies is uncommon unless there's significant **mucosal trauma** with a witnessed ingestion event. *Tertiary waves* - These are **non-peristaltic contractions** seen in **esophageal motility disorders** like **achalasia** or **diffuse esophageal spasm**. - Do not cause **hematemesis** and are typically associated with **dysphagia** and **chest pain**, not bleeding.

Q: Non-tropical sprue is characterized by?

Poor absorption of lipids. **Explanation:** **Non-tropical sprue**, also known as **Celiac Disease** or gluten-sensitive enteropathy, is an immune-mediated inflammatory disorder triggered by the ingestion of gluten. **Why Option D is correct:** The hallmark of non-tropical sprue is immune-mediated damage to the small intestinal mucosa, leading to **villous atrophy** and crypt hyperplasia. This destruction significantly reduces the surface area available for nutrient absorption. Since lipid digestion and absorption are complex processes requiring a large surface area and intact mucosal enzymes, **malabsorption of lipids (steatorrhea)** is a primary clinical feature. Patients typically present with foul-smelling, bulky, oily stools. **Why the other options are incorrect:** * **Option A:** In non-tropical sprue, there is **blunting or total atrophy** of the villi, not elongation. Elongation occurs in the crypts (crypt hyperplasia) as a compensatory mechanism. * **Option B:** **Currant jelly stools** are characteristic of **Intussusception**, caused by the mixture of mucus and blood. * **Option C:** Patients with malabsorption typically present with **hypolipidemia** (low cholesterol and triglycerides) because they cannot absorb dietary fats. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Small intestinal biopsy showing villous atrophy, crypt hyperplasia, and increased intraepithelial lymphocytes (Marsh Criteria). * **Serology:** Anti-tissue transglutaminase (anti-tTG) IgA is the screening drug of choice. Anti-endomysial antibody (EMA) is the most specific. * **Genetic Association:** Strongly linked with **HLA-DQ2** (95%) and **HLA-DQ8**. * **Associated Condition:** Dermatitis herpetiformis (itchy, bullous skin lesions). * **Malignancy Risk:** Increased risk of Enteropathy-associated T-cell lymphoma (EATL).

Q: Which is the best method for the diagnosis of small intestinal mucosal disease?

Small intestinal mucosal biopsy. The diagnosis of small intestinal mucosal disease (such as Celiac disease, Whipple’s disease, or Tropical sprue) requires direct visualization and histological assessment. **Small intestinal mucosal biopsy** is the gold standard because it allows for the definitive identification of characteristic pathological changes like villous atrophy, crypt hyperplasia, and intraepithelial lymphocytosis [1]. With the advent of endoscopy (OGD scopy), biopsies can be precisely taken from the second part of the duodenum (D2) [2]. **Analysis of Incorrect Options:** * **A. Small bowel series (Barium):** This is a radiological study useful for detecting structural abnormalities (strictures, fistulas, or diverticula) but lacks the sensitivity to detect microscopic mucosal changes [3]. * **B. Urinary D-xylose test:** This is a functional test for carbohydrate malabsorption. While it helps differentiate mucosal malabsorption from pancreatic insufficiency, it cannot provide a specific histological diagnosis. * **D. Breath hydrogen test:** This is used primarily to diagnose Small Intestinal Bacterial Overgrowth (SIBO) or lactose intolerance. It measures gas produced by bacterial metabolism rather than assessing mucosal integrity. **NEET-PG High-Yield Pearls:** * **Gold Standard:** Biopsy is the definitive test for Celiac disease (Marsh Classification) [1]. * **Site of Biopsy:** Usually the distal duodenum or proximal jejunum [2]. * **Whipple’s Disease:** Biopsy shows PAS-positive macrophages. * **Celiac Disease:** Biopsy shows "flat" mucosa with villous atrophy [1]. * **D-Xylose Fact:** It remains normal in pancreatic insufficiency but is decreased in mucosal diseases (e.g., Celiac).

Q: A 25-year-old male presents with pigmented macules on his palms, soles, and oral mucosa. He also has anemia and abdominal pain. What is the most probable diagnosis?

Peutz-Jeghers syndrome. **Explanation:** The clinical triad of **mucocutaneous pigmentation**, **gastrointestinal polyposis**, and **anemia** is classic for **Peutz-Jeghers Syndrome (PJS)**. It is an autosomal dominant disorder caused by a mutation in the **STK11 (LKB1)** gene. 1. **Why Option C is correct:** The hallmark is melanocytic macules (lentigines) appearing in early childhood on the lips, buccal mucosa (most specific), palms, and soles. Unlike common freckles, these do not fade with sun exposure. The abdominal pain and anemia are due to intestinal hamartomatous polyps, which can cause chronic occult bleeding or intussusception. 2. **Why other options are incorrect:** * **Albright’s Syndrome (McCune-Albright):** Characterized by large, unilateral "Café-au-lait" spots with irregular "Coast of Maine" borders, polyostotic fibrous dysplasia, and precocious puberty. It does not involve oral mucosal pigmentation. * **Cushing’s Syndrome:** Presents with systemic features like moon facies, buffalo hump, and purple striae. While hyperpigmentation can occur in ACTH-dependent cases, it is generalized rather than localized to the palms/soles/mucosa. * **Incontinentia Pigmenti:** An X-linked dominant condition that follows the Lines of Blaschko. It progresses through four stages (vesicular, verrucous, hyperpigmented, and atrophic) and typically affects females, as it is lethal in males. **NEET-PG High-Yield Pearls:** * **Most common site for PJS polyps:** Small intestine (specifically the jejunum). * **Malignancy Risk:** Patients have a significantly increased risk of GI and extra-GI cancers (breast, pancreas, ovary, and testis). * **Differential Diagnosis:** Laugier-Hunziker syndrome also presents with oral and acral pigmentation but lacks the systemic GI polyposis.

Q: A man presents with weakness, pain in the upper abdomen, hyperpigmentation, arthritis, hyperglycemia, and an enlarged palpable liver. What is the most probable diagnosis?

Hemochromatosis. ### Explanation The clinical presentation described is the classic "Bronze Diabetes" triad, which is hallmark for **Hereditary Hemochromatosis** [1]. **1. Why Hemochromatosis is Correct:** Hemochromatosis is an autosomal recessive disorder (most commonly the **HFE gene mutation**) leading to excessive iron absorption [1]. Iron deposits in various organs, causing multi-system damage: * **Liver:** Iron deposition leads to hepatomegaly, cirrhosis, and increased risk of Hepatocellular Carcinoma (HCC) [1]. * **Pancreas:** Damage to beta cells causes **Hyperglycemia/Diabetes Mellitus** [1]. * **Skin:** Iron deposition and increased melanin production cause **Hyperpigmentation** (bronzing) [1]. * **Joints:** Calcium pyrophosphate deposition leads to **Arthritis** (typically involving the 2nd and 3rd metacarpophalangeal joints). * **Heart:** Can lead to restrictive or dilated cardiomyopathy. **2. Why Other Options are Incorrect:** * **Addison’s Disease:** While it causes hyperpigmentation and weakness, it typically presents with **hypotension and hypoglycemia**, not hyperglycemia or hepatomegaly. * **Insulin Dependent Diabetes Mellitus (IDDM):** Explains the hyperglycemia but does not account for hepatomegaly, arthritis, or skin bronzing. * **Cushing’s Syndrome:** Presents with hyperglycemia and weakness, but features include central obesity, striae, and "moon facies" rather than hyperpigmentation and arthritis. **3. NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Liver biopsy with **Prussian Blue staining** (quantifies hepatic iron index) [2]. * **Screening Test:** Transferrin saturation (>45% is highly suggestive). * **Treatment of Choice:** Therapeutic Phlebotomy (maintains Ferritin ~50 ng/mL) [2]. * **Classic Joint Finding:** "Hook-like" osteophytes on X-ray of the MCP joints. * **Most Common Cause of Death:** Decompensated Cirrhosis or HCC.

Q: A 55-year-old male presents with retrosternal discomfort unrelated to physical exertion. The pain worsens after lying down and is partially relieved by antacids. What is the most likely diagnosis?

Hiatus hernia. **Explanation:** The patient presents with classic symptoms of **Gastroesophageal Reflux Disease (GERD)**, which is most commonly associated with a **Hiatus Hernia** [1]. In a hiatus hernia, the protrusion of the stomach through the diaphragmatic crus into the mediastinum compromises the lower esophageal sphincter (LES) pressure [1]. The pain is typically retrosternal, worsens in the **supine position** (due to gravity-assisted reflux), and is relieved by **antacids**, which neutralize gastric acid [1], [3]. **Analysis of Options:** * **Ischemic Heart Disease (IHD):** While IHD presents with retrosternal pain, it is typically precipitated by **physical exertion** and relieved by rest or nitrates. The relief with antacids and worsening with posture strongly point toward a GI etiology. * **Carcinoma Esophagus:** This usually presents with progressive **dysphagia** (initially for solids, then liquids) and significant weight loss rather than intermittent postural reflux pain [4]. * **Achalasia Cardia:** This is characterized by a failure of the LES to relax [2]. The primary symptom is **dysphagia for both solids and liquids** from the onset, often accompanied by regurgitation of undigested food, rather than acid-induced heartburn [2]. **NEET-PG High-Yield Pearls:** * **Sliding Hiatus Hernia (Type I):** The most common type (95%). The gastroesophageal junction moves above the diaphragm [1]. It is the type most associated with GERD. * **Paraesophageal Hernia (Type II):** The GE junction remains in place, but the fundus herniates [1]. It carries a higher risk of **strangulation/volvulus** and often requires surgical intervention even if asymptomatic [1]. * **Cameron Ulcers:** Linear erosions found in the mucosal folds of a hiatus hernia due to mechanical trauma; a known cause of iron deficiency anemia.

Question 1

Regarding hepatic encephalopathy, which of the following statements is TRUE or FALSE?

Accepted Answer

Statement 1 is True and Statement 5 is True, while Statement 2 is False, Statement 3 is False, and Statement 4 is False.

Answer

Statement 1 is True, Statement 2 is True, Statement 3 is True, and Statement 5 is True, while Statement 4 is False.

Answer

Statement 1 is True, Statement 2 is True, and Statement 5 is True, while Statement 3 is False and Statement 4 is False.

Answer

Statement 1 is True, Statement 2 is True, and Statement 5 is True, while Statement 3 is False and Statement 4 is False.

Question 2

A 45-year-old man with a history of chronic alcoholism presents to the emergency department with hematemesis. He denies any prior symptoms of nausea, vomiting, or NSAID use. On examination, his blood pressure is 94/73 mm Hg, heart rate is 110/min, and he has signs of chronic liver disease. Following resuscitation with IV fluids, urgent endoscopy reveals findings suggestive of a specific diagnosis. Which of the following is the most likely diagnosis?

Accepted Answer

Esophageal varices

Answer

Esophageal carcinoma

Answer

Foreign body

Answer

Tertiary waves

Question 3

Which of the following conditions does not cause secretory diarrhea?

Accepted Answer

Somatostatinoma

Answer

Medullary carcinoma of the thyroid

Answer

Carcinoid syndrome

Answer

Zollinger-Ellison syndrome

Question 4

Non-tropical sprue is characterized by?

Accepted Answer

Poor absorption of lipids

Answer

Elongation of intestinal villi

Answer

Currant jelly stools

Answer

Hypertriglyceridemia

Question 5

Which is the best method for the diagnosis of small intestinal mucosal disease?

Accepted Answer

Small intestinal mucosal biopsy

Answer

Small bowel series using barium contrast

Answer

Urinary D-xylose test

Answer

Breath hydrogen test

Question 6

A 25-year-old male presents with pigmented macules on his palms, soles, and oral mucosa. He also has anemia and abdominal pain. What is the most probable diagnosis?

Accepted Answer

Peutz-Jeghers syndrome

Answer

Albright's syndrome

Answer

Cushing's syndrome

Answer

Incontinentia pigmenti

Question 7

A man presents with weakness, pain in the upper abdomen, hyperpigmentation, arthritis, hyperglycemia, and an enlarged palpable liver. What is the most probable diagnosis?

Accepted Answer

Hemochromatosis

Answer

Addison's disease

Answer

Insulin Dependent Diabetes Mellitus

Answer

Cushing's syndrome

Question 8

Which of the following is considered to be an effective treatment for Type I hepatorenal syndrome?

Accepted Answer

Albumin infusion with terlipressin

Answer

Hemodialysis

Answer

Peritoneal dialysis

Answer

Large dose diuretic therapy

Question 9

A patient is found to be positive for HBs Ag on routine laboratory evaluation. Other serological tests for hepatitis are unremarkable. He is clinically asymptomatic and liver enzymes are within the normal range. Which of the following best describes his diagnosis?

Accepted Answer

Inactive HBV carrier

Answer

Acute Hepatitis B

Answer

Chronic Hepatitis B

Answer

Active HBV carrier

Question 10

A 55-year-old male presents with retrosternal discomfort unrelated to physical exertion. The pain worsens after lying down and is partially relieved by antacids. What is the most likely diagnosis?

Accepted Answer

Hiatus hernia

Answer

Ischemic heart disease

Answer

Carcinoma esophagus

Answer

Achalasia cardia

Gastroenterology — MCQs

Gastroenterology — MCQs

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