Gastroenterology — MCQs

Gastroenterology Indian Medical PG Practice Questions and MCQs

Question 1161: A 45-year-old female presents with a long-standing history of heartburn and regurgitation. Endoscopy reveals Barrett's esophagus. What is the primary concern for this patient?

A. Gastric ulcer
B. Esophageal cancer (Correct Answer)
C. Peptic stricture
D. Achalasia

Explanation: ***Esophageal cancer*** - Barrett's esophagus is a precancerous condition that significantly increases the risk of **adenocarcinoma** of the esophagus [3]. - Regular surveillance is necessary due to potential **malignant transformation** in patients with Barrett's esophagus [3]. *Achalasia* - This condition presents with **dysphagia** for solids and liquids and does not show a direct link to Barrett's esophagus. - It primarily affects the **lower esophageal sphincter**, leading to **esophageal dilation** rather than a concern for cancer [1]. *Peptic stricture* - While this may occur due to chronic gastroesophageal reflux, it is not as significant a concern as **esophageal cancer** in patients with Barrett's esophagus [2]. - Peptic strictures are typically **benign** and can be treated with dilation [1]. *Gastric ulcer* - Gastric ulcers are unrelated to Barrett's esophagus and present differently, mainly with **epigastric pain**. - They do not stem from **chronic reflux** and thus are not a primary concern in this patient.

Question 1162: Which of the following laboratory values is NOT included in the MELD score?

A. INR (International Normalized Ratio)
B. Serum bilirubin
C. Serum creatinine
D. Alkaline phosphatase (Correct Answer)

Explanation: ***Alkaline phosphatase*** - **Alkaline phosphatase** is a liver enzyme that can be elevated in various liver conditions, particularly those involving **biliary obstruction** [1], but it is not a component of the MELD score calculation. - The MELD score focuses on markers of **liver synthetic function** and **renal impairment** [2], not enzymes indicative of cholestasis or hepatocellular damage alone. *Serum bilirubin* - **Serum bilirubin** is a crucial component of the MELD score, reflecting the liver's ability to **process and excrete bilirubin**, a byproduct of red blood cell breakdown [1]. - Elevated bilirubin levels indicate **impaired liver function**, often seen in advanced liver disease. *Serum creatinine* - **Serum creatinine** is included in the MELD score to account for **renal dysfunction** [2], which is a common and serious complication in patients with end-stage liver disease. - **Kidney impairment** significantly impacts the prognosis of patients awaiting liver transplantation. *INR (International Normalized Ratio)* - The **INR** measures the **extrinsic pathway of coagulation** and reflects the liver's capacity to synthesize **clotting factors** (II, VII, IX, X). [2] - An elevated INR indicates **impaired liver synthetic function**, making it a key prognostic indicator in the MELD score.

Question 1163: Which test is most useful in differentiating between Irritable Bowel Syndrome (IBS) and organic gastrointestinal diseases?

A. Stool calprotectin
B. Colonoscopy (Correct Answer)
C. Abdominal ultrasound
D. Fecal occult blood test

Explanation: ***Colonoscopy*** - A definitive **colonoscopy** allows for direct visualization of the colonic mucosa, enabling the identification of **inflammation**, **ulcers**, or **polyps** characteristic of organic GI diseases [1]. - While IBS is a **functional disorder** with no visible abnormalities on colonoscopy, this procedure can rule out **inflammatory bowel disease (IBD)**, **colorectal cancer**, or **microscopic colitis** [1]. *Stool calprotectin* - **Stool calprotectin** is a marker of intestinal inflammation and is typically elevated in **inflammatory bowel disease (IBD)** but normal in IBS. - Although useful for screening out IBD, it does not provide definitive diagnosis or rule out other organic causes like **microscopic colitis** or **colorectal cancer**. *Abdominal ultrasound* - An **abdominal ultrasound** is primarily used to evaluate intra-abdominal organs like the liver, gallbladder, pancreas, and kidneys, but it has limited utility in visualizing the bowel wall or detecting microscopic inflammation. - It is not sensitive or specific enough to differentiate between IBS and many **organic gastrointestinal diseases** that affect the colon directly. *Fecal occult blood test* - A **fecal occult blood test** detects hidden blood in the stool, which can indicate **gastrointestinal bleeding** from conditions like **colorectal cancer**, **ulcers**, or **inflammatory bowel disease** [2]. - While positive results suggest a need for further investigation, a negative result does not rule out all organic diseases (e.g., microscopic colitis, celiac disease, or non-bleeding polyps) and is therefore not definitive for differentiating from IBS [2].

Question 1164: In men, what quantity of ethyl alcohol consumed daily for more than 10 years increases the relative risk of developing alcoholic liver disease?

A. 20g/d
B. 60g/d
C. 80g/d
D. 40g/d (Correct Answer)

Explanation: 40g/d - Chronic consumption of 40g/d or more of ethanol in men, and 20g/d or more in women, significantly increases the risk of developing alcoholic liver disease over 10 years [1]. - This threshold represents a level of regular alcohol intake that causes cumulative hepatic damage over time [1]. 20g/d - While 20g/d in women significantly increases the risk, in men, this amount is generally considered the threshold for low-risk drinking in the absence of other risk factors. - Consistent consumption at this level in men for more than 10 years would be very unlikely to raise the relative risk of developing alcoholic liver disease above that of the general population. 60g/d - This amount certainly carries a high risk of alcoholic liver disease, but it is above the minimum threshold required to significantly increase the relative risk. - The risk of cirrhosis and other severe liver damage escalates with intake greater than 40g/d [1]. 80g/d - Consumption at 80g/d represents a very high level of alcohol intake and is associated with a substantially elevated risk of severe alcoholic liver disease. - However, the question asks for the quantity that increases the relative risk, meaning the lowest dose above which the risk is significantly higher than baseline.

Question 1165: How long after an attack of acute pancreatitis does a pancreatic pseudocyst typically develop?

A. Less than 1 week
B. Less than 2 weeks
C. 3 or more weeks
D. 4 or more weeks (Correct Answer)

Explanation: ***4 or more weeks*** - A **pancreatic pseudocyst** is a collection of pancreatic fluid that becomes encapsulated by a non-epithelialized fibrous wall. [1] - This encapsulation process typically takes **at least 4 weeks** to form after the initial acute pancreatitis attack. *Less than 1 week* - Within the first week of acute pancreatitis, the fluid collections are usually ill-defined, **peripancreatic fluid collections** without a well-formed wall. - These early collections are typically referred to as **acute peripancreatic fluid collections** (APFCs) or acute necrotic collections (ANCs) and do not meet the criteria for a pseudocyst. *Less than 2 weeks* - Fluid collections appearing within the first two weeks are still generally **unwalled** and do not have the characteristic fibrous capsule of a pseudocyst. [1] - They are considered acute fluid collections that may resolve spontaneously or evolve. *3 or more weeks* - While some organization might begin by 3 weeks, a **completely matured fibrous wall**, which defines a true pseudocyst, is generally not fully developed until **4 weeks or later**. - Collections at 3 weeks might still be evolving and may not yet be considered a stable pseudocyst.

Question 1166: Which of the following causes of acute pancreatitis can cause recurrent bouts without any obvious pathology?

A. Sphincter of Oddi dysfunction
B. Pancreas divisum
C. Hypertriglyceridemia
D. All of the options (Correct Answer)

Explanation: ***All of the options*** - **Sphincter of Oddi dysfunction**, **Pancreas divisum**, and **Hypertriglyceridemia** are all recognized causes of recurrent acute pancreatitis without always presenting obvious structural pathology on initial imaging like ultrasound or CT [1]. - These conditions can lead to repeated episodes of pancreatitis due to intermittent obstruction, abnormal pancreatic duct anatomy, or direct toxic effects, respectively, which may be difficult to diagnose without specific investigations [1]. *Sphincter of Oddi dysfunction* - This condition involves **spasms or stenosis of the sphincter of Oddi**, leading to impaired outflow of pancreatic and biliary secretions [1]. - The obstruction can be intermittent, causing recurrent attacks of pancreatitis without a visible stone or mass on routine imaging. *Pancreas divisum* - It is a **congenital anomaly** where the dorsal and ventral pancreatic ducts fail to fuse, leading to drainage of the dominant dorsal pancreas through a smaller accessory papilla. - This narrow opening can lead to **relative obstruction** and recurrent episodes of acute pancreatitis, especially when the main drainage is through the minor papilla. *Hypertriglyceridemia* - Significantly elevated levels of **triglycerides (typically >1000 mg/dL)** can directly cause damage to pancreatic acinar cells. - This condition can precipitate recurrent bouts of acute pancreatitis, and the underlying hypertriglyceridemia may not always be immediately recognized as the cause without specific lipid panel testing.

Question 1167: What is the most accurate method for diagnosing Gastroesophageal Reflux Disease (GERD)?

A. Histological study
B. Manometry
C. 24-hour pH recording and electrical impedance measurement (Correct Answer)
D. Barium swallow studies and Upper GI endoscopy

Explanation: ***24-hour pH recording and electrical impedance measurement*** - This method directly measures the **frequency and duration of acid reflux** into the esophagus, correlating symptoms with reflux episodes. - **Electrical impedance** also detects non-acidic reflux, making it the most comprehensive and accurate diagnostic tool for GERD. *Histological study* - While histology can show **esophageal inflammation** (esophagitis), this finding is not specific to GERD and can be caused by other conditions. - It does not directly assess the **frequency or severity of reflux episodes**. *Manometry* - Esophageal manometry measures the pressure and coordination of muscle contractions, primarily used to diagnose **motility disorders** such as achalasia. [1] - It assesses the integrity of the **lower esophageal sphincter (LES)** but does not quantify reflux events. [1] *Barium swallow studies and Upper GI endoscopy* - **Barium swallow** can identify anatomical abnormalities like hiatal hernias or severe reflux, but it has low sensitivity for diagnosing GERD itself. [1] - **Upper GI endoscopy** can visualize mucosal damage (esophagitis) consistent with GERD but does not confirm reflux is the cause of symptoms if the mucosa appears normal (non-erosive reflux disease). [1]

Question 1168: Which of the following statements about medical management of uncomplicated GERD is true?

A. Household measures such as tilting the bed can be effective.
B. PPIs are the most effective drug treatment for GERD. (Correct Answer)
C. An adequate dose of PPI for 8 weeks is the recommended treatment.
D. Long-term PPI therapy is associated with an increased risk of gastric malignancy.

Explanation: PPIs are the most effective drug treatment for GERD. [1] - Proton pump inhibitors (PPIs) are considered the most potent and effective medications for suppressing gastric acid secretion, which is the primary mechanism for treating GERD symptoms and healing esophagitis. - They work by irreversibly inhibiting the H+/K+-ATPase pump in gastric parietal cells, leading to a profound reduction in stomach acid. *Household measures such as tilting the bed can be effective.* - While lifestyle modifications like elevating the head of the bed, avoiding late meals, and dietary changes are often recommended, they are generally adjunctive measures and not the primary or most effective drug treatment for GERD symptoms. - These measures can help reduce reflux episodes but do not address the underlying acid secretion as effectively as medications. *An adequate dose of PPI for 8 weeks is the recommended treatment.* - An adequate dose of PPI for 8 weeks is indeed a common initial treatment course for GERD with esophagitis or severe symptoms but this statement refers to a specific treatment duration, not the general effectiveness of PPIs as a drug class. [1] - The most effective drug treatment refers to the class of medication that works best, which are PPIs. *Long-term PPI therapy is associated with an increased risk of gastric malignancy.* - While there are ongoing debates and studies regarding the long-term effects of PPIs, current evidence generally does not strongly support a direct causal link between long-term PPI therapy and an increased risk of gastric malignancy in the absence of Helicobacter pylori infection. [1] - Concerns about long-term PPI use often center around conditions like C. difficile infection, osteoporosis, and kidney disease, rather than gastric malignancy. [1]

Question 1169: In which of the following conditions is non-surgical medical treatment for gallstones indicated?

A. Prophylaxis in patients at high risk for gallstone formation
B. Dissolution therapy candidates with radiolucent stones <15mm
C. Small cholesterol stones in patients unfit for surgery
D. Patient refusal of surgical intervention with cholesterol stones (Correct Answer)

Explanation: **Patient refusal of surgical intervention with cholesterol stones** - When a patient with **symptomatic gallstones** (even cholesterol stones) refuses surgery, medical dissolution therapy may be considered as an alternative, despite its limitations and lower efficacy compared to cholecystectomy. - This option prioritizes **patient autonomy** when surgical intervention is the standard but declined. *Small cholesterol stones in patients unfit for surgery* - While medical dissolution therapy can be considered for **small cholesterol stones**, being "unfit for surgery" in itself doesn't automatically mean medical treatment is indicated without symptoms. - Asymptomatic stones generally do not require treatment, regardless of surgical fitness; treatment is usually reserved for symptomatic cases or specific high-risk scenarios. *Dissolution therapy candidates with radiolucent stones <15mm* - This describes ideal candidates for dissolution therapy using oral bile acids (e.g., **ursodeoxycholic acid**). - The size and radiolucency (indicating cholesterol stones) are important criteria, but this option isn't the *most likely* sole indication for non-surgical treatment when compared to a patient who actively refuses surgery, which forces consideration of alternatives even if less effective. *Prophylaxis in patients at high risk for gallstone formation* - Prophylactic treatment for gallstones is generally **not indicated** even in high-risk patients (e.g., rapid weight loss, bariatric surgery) unless they become symptomatic [1]. - The focus is usually on watchful waiting or, in very high-risk scenarios (e.g., post-bariatric surgery), ursodeoxycholic acid might be used to prevent stone formation, but this is a specific prophylactic use, not a direct treatment for existing stones.

Question 1170: Which of the following is a common prognostic factor for Acute Pancreatitis?

A. Serum Glucose
B. Serum AST
C. Serum Amylase
D. Serum Calcium (Correct Answer)

Explanation: ### Serum Calcium - **Hypocalcemia** is a common **prognostic indicator** in severe acute pancreatitis, often due to saponification of fat by pancreatic lipases, leading to calcium precipitation [1]. - A persistent decrease in serum calcium levels can correlate with a **worse prognosis** and increased risk of complications [1]. *Serum Amylase* - While **elevated serum amylase** is diagnostic of acute pancreatitis, its absolute level **does not correlate with disease severity** or prognosis. - Amylase levels can return to normal even while the patient is still very ill with severe pancreatitis. *Serum Glucose* - **Hyperglycemia** can occur in acute pancreatitis due to impaired insulin secretion or increased counter-regulatory hormones, and may be included in some severity scoring systems [1]. - However, it is generally considered **less sensitive or specific** as a standalone prognostic factor compared to other markers like calcium. *Serum AST* - **Elevated AST** (and ALT) typically indicates a **biliary etiology** for acute pancreatitis, such as gallstones. - While it helps determine the cause, **AST levels themselves are not a primary prognostic factor** for the overall severity or outcome of the pancreatitis.

Practice by Chapter

Esophageal Disorders

Practice Questions

Peptic Ulcer Disease

Practice Questions

Inflammatory Bowel Disease

Practice Questions

Irritable Bowel Syndrome

Practice Questions

Malabsorption Syndromes

Practice Questions

Pancreatitis (Acute and Chronic)

Practice Questions

Gastrointestinal Bleeding

Practice Questions

Liver Diseases and Cirrhosis

Practice Questions

Viral Hepatitis

Practice Questions

Biliary Tract Disorders

Practice Questions

Gastrointestinal Motility Disorders

Practice Questions

Gastrointestinal Malignancies

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free