Gastroenterology Practice Questions

Q: Which of the following statements is true regarding ulcerative colitis?

It is a premalignant condition.. ### Explanation **1. Why Option A is Correct:** Ulcerative Colitis (UC) is considered a **premalignant condition**. Chronic inflammation leads to a "dysplasia-carcinoma sequence." The risk of developing **Colorectal Carcinoma (CRC)** increases significantly with the duration of the disease (usually after 8–10 years) and the extent of involvement (pancolitis carries a higher risk than proctitis) [1]. Regular surveillance colonoscopy with biopsies is mandatory for these patients. **2. Why Other Options are Incorrect:** * **Option B:** **Cobblestone appearance** is a hallmark of **Crohn’s Disease**, caused by deep longitudinal and transverse ulcers separated by areas of edematous but intact mucosa. In UC, the mucosa is typically granular and friable. * **Option C:** While **pseudopolyps** (inflammatory polyps formed by regenerating islands of mucosa) are very common in UC, they are **not exclusive** to it; they can also be seen in Crohn’s disease or any severe inflammatory insult to the colon [1]. * **Option D:** UC is characterized by **rectal involvement in >95% of cases**. It starts in the rectum (proctitis) and spreads proximally in a **continuous, symmetrical fashion** without "skip lesions" [1]. **3. High-Yield Clinical Pearls for NEET-PG:** * **Depth of Involvement:** UC involves only the **mucosa and submucosa** (Crohn’s is transmural) [1]. * **Lead Pipe Appearance:** Loss of haustrations on barium enema due to chronic scarring. * **Smoking Paradox:** Smoking is **protective** in UC (it may worsen Crohn’s). * **Extra-intestinal Manifestation:** **Primary Sclerosing Cholangitis (PSC)** is more strongly associated with UC than Crohn’s. * **Microscopy:** Presence of **Crypt abscesses** (neutrophils in crypt lumens) [1].

Q: Which immunoglobulin level is specifically elevated in autoimmune pancreatitis?

IgG4. **Explanation:** **Autoimmune Pancreatitis (AIP)** is a distinct form of chronic pancreatitis characterized by a fibroinflammatory process. It is the pancreatic manifestation of **IgG4-related disease (IgG4-RD)**. **Why IgG4 is the correct answer:** Type 1 AIP (the most common form globally) is characterized by high serum levels of **IgG4** and dense infiltration of IgG4-positive plasma cells in the pancreatic tissue. Histologically, this presents as Lymphoplasmacytic Sclerosing Pancreatitis (LPSP). A serum IgG4 level >135 mg/dL is a key diagnostic marker and is part of the HISORt criteria used to diagnose the condition. **Analysis of Incorrect Options:** * **IgM:** Typically elevated in primary biliary cholangitis (PBC) or acute infections. It is not a marker for AIP. * **IgE:** Associated with Type 1 hypersensitivity reactions (allergies) and parasitic infections. While some AIP patients have peripheral eosinophilia, IgE is not the specific diagnostic marker. * **IgG2:** While IgG2 is the most abundant subclass in response to bacterial capsular polysaccharides, it has no specific association with autoimmune pancreatitis. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** Painless obstructive jaundice in an elderly male, often mimicking pancreatic cancer ("sausage-shaped" pancreas on CT). * **Treatment:** AIP is highly **steroid-responsive**, which helps differentiate it from pancreatic malignancy. * **Extrapancreatic manifestations:** Look for associated Sclerosing Cholangitis, Salivary gland involvement (Küttner's tumor), or Retroperitoneal fibrosis. * **Type 2 AIP:** Unlike Type 1, Type 2 is **not** associated with elevated IgG4 and is often linked to Inflammatory Bowel Disease (UC).

Q: When carcinoma of the stomach develops secondarily to pernicious anemia, in which region is it usually situated?

Fundus. The correct answer is **Fundus (Option D)**. **Pathophysiology:** Pernicious anemia is an autoimmune condition characterized by the presence of antibodies against gastric parietal cells and intrinsic factor [1]. This leads to **Type A Gastritis (Autoimmune Metaplastic Atrophic Gastritis)**. Since parietal cells are predominantly located in the **fundus and the body** of the stomach, these areas undergo significant mucosal atrophy and intestinal metaplasia [1]. This chronic inflammatory environment predisposes the tissue to adenocarcinoma. While both the body and fundus are affected, the fundus is the classic site cited for malignancies secondary to pernicious anemia in medical literature and competitive exams. **Analysis of Incorrect Options:** * **A & B (Prepyloric region and Pylorus):** These areas constitute the gastric antrum. Carcinomas associated with *H. pylori* infection (Type B Gastritis) typically occur here. In pernicious anemia, the antrum is usually spared because it lacks parietal cells [1]. * **C (Body):** While the body is affected by atrophic gastritis in pernicious anemia, the fundus is considered the more characteristic site for the development of these specific secondary carcinomas in the context of this disease. **NEET-PG High-Yield Pearls:** * **Type A Gastritis:** **A**utoimmune, **A**nemia (Pernicious), **A**chlorhydria, and involves the **A**ndrum-sparing (Fundus/Body) [1]. * **Type B Gastritis:** **B**acterial (*H. pylori*), involves the **B**ad part (Antrum). * **Risk:** Patients with pernicious anemia have a 3-fold increased risk of gastric adenocarcinoma and are also at risk for **Gastric Carcinoid tumors** (due to hypergastrinemia stimulating ECL cells). * **Marker:** Anti-parietal cell antibodies are sensitive; Anti-intrinsic factor antibodies are specific.

Q: What is the most common paraneoplastic syndrome in hepatocellular carcinoma (HCC)?

Hypoglycaemia. **Explanation:** Hepatocellular Carcinoma (HCC) is frequently associated with various paraneoplastic syndromes due to the liver's role in metabolism and hormone synthesis. **1. Why Hypoglycemia is Correct:** Hypoglycemia is the **most common** paraneoplastic manifestation of HCC, occurring in approximately 5–27% of patients. It occurs via two mechanisms: * **Type A:** Occurs in the terminal stages due to massive tumor burden and liver failure (inability to perform gluconeogenesis). * **Type B:** Occurs early in the disease due to the secretion of **IGF-II (Insulin-like Growth Factor-II)** by the tumor cells, which mimics insulin action. **2. Analysis of Incorrect Options:** * **B. Hypertension:** While HCC can rarely cause hypertension through the secretion of angiotensinogen, it is not a classic or common paraneoplastic feature. * **C. Hypercalcemia:** This is the most common paraneoplastic syndrome in **Renal Cell Carcinoma (RCC)** and Squamous Cell Carcinoma of the lung, caused by PTHrP secretion. In HCC, it is less common than hypoglycemia. * **D. Erythrocytosis:** This occurs in about 3–10% of HCC cases due to ectopic **Erythropoietin (EPO)** production. While high-yield, it is statistically less frequent than hypoglycemia. **Clinical Pearls for NEET-PG:** * **Most common paraneoplastic syndrome in HCC:** Hypoglycemia. * **Most common paraneoplastic syndrome in RCC:** Hypercalcemia (Stauffer’s syndrome is also specific to RCC). * **Hypercholesterolemia** is another notable paraneoplastic feature of HCC (seen in ~10-40% of cases). * **Tumor Marker:** Alpha-fetoprotein (AFP) is the primary marker used for screening and monitoring HCC.

Q: A 24-year-old female presents with a history of easy fatigability and dysphagia. Oral ulcers and oesophageal webs are noted on endoscopy. What is the most common site for oesophageal webs?

Upper end of the esophagus. ### Explanation The clinical presentation of a young female with easy fatigability (suggestive of iron deficiency anemia), oral ulcers, and esophageal webs is characteristic of **Plummer-Vinson Syndrome** (also known as Paterson-Brown-Kelly Syndrome). **1. Why the Correct Answer is Right:** Esophageal webs are thin, eccentric, mucosal folds that protrude into the lumen. They are most commonly located in the **upper end of the esophagus** (specifically the post-cricoid region). These webs are composed of mucosa and submucosa and are typically found on the anterior wall, though they can involve the entire circumference. **2. Why the Incorrect Options are Wrong:** * **Lower end of the esophagus:** This is the characteristic site for **Schatzki rings** (B-rings). Unlike webs, rings are circumferential, thicker, and involve the mucosa, submucosa, and sometimes the muscularis layer [1]. * **Middle layer of the esophagus:** While traction diverticula or corrosive injuries can affect the mid-esophagus, primary mucosal webs are rarely found here. * **Lateral wall of the esophagus:** Webs typically arise from the **anterior wall** of the cervical esophagus, not the lateral walls. **3. NEET-PG High-Yield Pearls:** * **Triad of Plummer-Vinson Syndrome:** Iron deficiency anemia, Dysphagia (painless/intermittent), and Cervical esophageal webs. * **Associated findings:** Glossitis (smooth tongue), Koilonychia (spoon-shaped nails), and Cheilosis. * **Gold Standard Diagnosis:** Barium swallow (lateral view) is more sensitive than endoscopy for detecting thin webs [1]. * **Malignancy Risk:** It is a premalignant condition associated with an increased risk of **Squamous Cell Carcinoma** of the post-cricoid region and upper esophagus. * **Treatment:** Iron supplementation often resolves the dysphagia; mechanical dilation is used for persistent cases.

Question 1

A 45-year-old patient presents with massive hematemesis. The patient is alert and hemodynamically stable. What is the next immediate step in management?

Accepted Answer

Position the patient in recovery position and protect the airway

Answer

Initiate blood transfusion

Answer

Start intravenous fluids

Answer

Perform urgent upper gastrointestinal endoscopy

Question 2

A 40-year-old male patient, a known smoker, presents with fever, fatigue, and complete aversion to cigarette smoking. On examination, he has icterus with an enlarged, tender liver. LFT shows Total bilirubin 17.5 mg%, Direct bilirubin 5.5 mg%, SGOT 700 IU, and SGPT 900 IU. What investigations will you perform to rule out acute viral hepatitis?

Accepted Answer

Hepatitis A antibody (Anti-HAV), Hepatitis B surface antigen (HBsAg), IgM antibody to Hepatitis B core antigen (IgM anti-HBc), Hepatitis C antibody (Anti-HCV)

Answer

Hepatitis B surface antigen (HBsAg), IgM antibody to Hepatitis B core antigen (IgM anti-HBc), Hepatitis C antibody (Anti-HCV), Hepatitis E antibody (Anti-HEV)

Answer

Hepatitis B antigen (HBAg), IgM antibody to Hepatitis B core antigen (IgM anti-HBc), Hepatitis D antibody (Anti-HDV), Hepatitis C antibody (Anti-HCV), Hepatitis E antibody (Anti-HEV)

Answer

Hepatitis A antibody (Anti-HAV), IgM antibody to Hepatitis B core antigen (IgM anti-HBc), Hepatitis C antibody (Anti-HCV), Hepatitis E antibody (Anti-HEV)

Question 3

Which of the following statements is true regarding ulcerative colitis?

Accepted Answer

It is a premalignant condition.

Answer

Cobblestone mucosa is a characteristic feature.

Answer

Pseudopolyps are seen exclusively in ulcerative colitis.

Answer

It rarely affects the rectum.

Question 4

Which immunoglobulin level is specifically elevated in autoimmune pancreatitis?

Accepted Answer

IgG4

Answer

IgM

Answer

IgE

Answer

IgG2

Question 5

Cholestatic jaundice is associated with all of the following, except:

Accepted Answer

A moderate to marked increase in SGOT

Answer

Predominantly conjugated hyperbilirubinemia

Answer

Minimal biochemical changes of parenchymal liver damage

Answer

A moderate to marked increase in serum alkaline phosphatase

Question 6

When carcinoma of the stomach develops secondarily to pernicious anemia, in which region is it usually situated?

Accepted Answer

Fundus

Answer

Prepyloric region

Answer

Pylorus

Answer

Body

Question 7

A patient presents with chronic small bowel diarrhea. A duodenal biopsy shows villous atrophy, and serological tests reveal positive anti-endomysial antibodies and IgA tissue transglutaminase (TTG) antibodies. What is the treatment of choice?

Accepted Answer

Gluten-free diet

Answer

Antibiotics

Answer

Loperamide

Answer

5-aminosalicylic acid (5-ASA)

Question 8

What is the most common paraneoplastic syndrome in hepatocellular carcinoma (HCC)?

Accepted Answer

Hypoglycaemia

Answer

Hypertension

Answer

Hypercalcemia

Answer

Erythrocytosis

Question 9

Which of the following is true about varioliform gastritis?

Accepted Answer

It is characterized by nodules, thickened folds and erosions

Answer

It is a type of acute gastritis

Answer

Diagnosis is difficult to make on endoscopy

Answer

It is a common form of gastritis

Question 10

A 24-year-old female presents with a history of easy fatigability and dysphagia. Oral ulcers and oesophageal webs are noted on endoscopy. What is the most common site for oesophageal webs?

Accepted Answer

Upper end of the esophagus

Answer

Lower end of the esophagus

Answer

Middle layer of the esophagus

Answer

Lateral wall of the esophagus

Gastroenterology — MCQs

Gastroenterology — MCQs

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