Gastroenterology — MCQs

Gastroenterology Indian Medical PG Practice Questions and MCQs

Question 1131: A patient presents with epigastric pain that improves with eating. What is the most likely diagnosis?

A. Duodenal ulcer (Correct Answer)
B. Gastric ulcer
C. Gastroesophageal reflux disease
D. Pancreatitis

Explanation: ***Duodenal ulcer*** - Pain that **improves with eating** is a classic symptom of a duodenal ulcer, as food buffers the acid and temporarily reduces irritation [1]. - The pain typically recurs **2-3 hours after meals** or at night when the stomach is empty and acid levels are high [1]. *Gastric ulcer* - Gastric ulcer pain is usually **worsened by eating** as food stimulates acid secretion, irritating the ulcer. - Pain often occurs **shortly after meals** (within 30 minutes to an hour). *Gastroesophageal reflux disease* - Characterized by **heartburn** and **regurgitation**, especially after meals or when lying down, and is not typically improved by eating. - **Epigastric pain** may be present but is usually associated with a burning sensation behind the sternum, unrelated to pain relief with food intake. *Pancreatitis* - Pancreatitis typically causes severe, **persistent epigastric pain** that often **radiates to the back** and is usually worsened by eating, particularly fatty foods. - It is not characterized by pain relief with food intake; in fact, eating often exacerbates the pain.

Question 1132: A patient with a history of chronic alcohol use presents with jaundice and ascites. Which structure is most likely to be compromised?

A. Portal vein (Correct Answer)
B. Hepatic artery
C. Bile duct
D. Inferior vena cava

Explanation: ***Portal vein*** - Chronic alcohol use often leads to **cirrhosis**, which causes **portal hypertension** due to increased resistance to blood flow within the liver [1]. - **Jaundice** results from impaired liver function (inability to process bilirubin) [1], and **ascites** is a direct consequence of portal hypertension, often combined with hypoalbuminemia [1]. *Hepatic artery* - The hepatic artery supplies oxygenated blood to the liver; its compromise would typically lead to **ischemia** or **infarction** of liver tissue. - While significant compromise could affect liver function, it is less directly linked to the development of ascites in the context of chronic alcohol-induced liver disease. *Bile duct* - Compromise of the bile duct, such as due to **obstruction**, would primarily cause **obstructive jaundice** and potentially **cholangitis** or liver damage due to bile stasis. - While jaundice would be present, bile duct obstruction does not typically cause ascites without significant, prolonged secondary liver damage. *Inferior vena cava* - Obstruction or compromise of the inferior vena cava (IVC) would lead to **Budd-Chiari syndrome** if affecting hepatic veins, or systemic venous congestion [1]. - While IVC obstruction can cause **ascites** (due to increased hydrostatic pressure in the systemic circulation) and **hepatomegaly**, it is less directly associated with profound jaundice from chronic alcohol use compared to portal vein pathology [1].

Question 1133: A 60-year-old man presents with left lower quadrant pain and fever. Colonoscopy reveals diverticulitis. Which part of the colon is most likely to be affected?

A. Ascending colon
B. Transverse colon
C. Descending colon
D. Sigmoid colon (Correct Answer)

Explanation: Sigmoid colon - The sigmoid colon is the most common site of diverticular disease in Western populations due to its smaller lumen and higher intraluminal pressure. - Left lower quadrant pain is the typical presentation of sigmoid diverticulitis, consistent with this patient's symptoms. Descending colon - While the descending colon can be affected by diverticulitis, it is less common than the sigmoid colon. - Symptoms are similar to sigmoid diverticulitis but are generally less frequent. Ascending colon - Right-sided diverticulitis, affecting the ascending colon, is more common in Asian populations and can mimic appendicitis. - This patient presents with left lower quadrant pain, which is inconsistent with ascending colon involvement. Transverse colon - Diverticulitis of the transverse colon is relatively rare, accounting for a small percentage of cases. - Pain would typically be in the upper abdomen rather than the left lower quadrant.

Question 1134: A 60-year-old male presents with a history of chronic constipation and a recent change in bowel habits. Colonoscopy reveals an ulcerative lesion in the sigmoid colon. What is the most likely diagnosis?

A. Diverticulosis
B. Ulcerative colitis
C. Colorectal cancer (Correct Answer)
D. Crohn's disease

Explanation: ***Colorectal cancer*** - The combination of **chronic constipation**, a **recent change in bowel habits**, and an **ulcerative lesion** seen on colonoscopy in a 60-year-old male is highly suspicious for colorectal cancer [1]. - Changes in bowel habits, especially in older adults, are a classic red flag for **malignancy** and warrant thorough investigation [1]. *Diverticulosis* - Diverticulosis refers to the presence of **diverticula**, small pouches in the colon wall, which are often asymptomatic. - While diverticulosis can cause changes in bowel habits if inflamed (**diverticulitis**), it typically doesn't present as a singular **ulcerative lesion** but rather multiple pockets. *Ulcerative colitis* - Ulcerative colitis is a form of **inflammatory bowel disease** characterized by diffuse inflammation and superficial ulcerations primarily affecting the **colon and rectum**, starting distally [2]. - While it causes ulcerative lesions, the presentation is usually with **bloody diarrhea**, and the description of a single focal ulcerative lesion is less typical [2]. *Crohn's disease* - Crohn's disease is another **inflammatory bowel disease** that can affect any part of the **gastrointestinal tract** from mouth to anus, with characteristic **skip lesions** and **transmural inflammation** [2]. - While it can cause ulcerations and changes in bowel habits, a single, focal ulcerative lesion in the sigmoid colon as the primary finding without other typical Crohn's features makes it less likely than cancer.

Question 1135: A patient with multiple colonic polyps is at an increased risk of developing which malignancy?

A. Cholangiocarcinoma
B. Lung cancer
C. Colon cancer (Correct Answer)
D. Renal cell carcinoma

Explanation: ***Colon cancer*** - Patients with multiple **colonic polyps**, especially in conditions like **Familial Adenomatous Polyposis (FAP)**, have a significantly higher risk of progressing to colon cancer [1]. - The presence of a large number of polyps is a strong predictor of malignant transformation, typically occurring by the age of 40 if untreated [1]. *Cholangiocarcinoma* - This is a malignancy of the **bile ducts**, not typically associated with colonic polyps. - Risk factors include chronic **liver disease**, primary sclerosing cholangitis, and specific **infections**, none related to colonic polyp formation. *Renal cell carcinoma* - Primarily a cancer of the **kidneys** and not directly linked to colonic polyps. - Risk factors include **smoking**, **obesity**, and hypertension, which are distinct from those associated with colonic polyps. *Lung cancer* - Strongly associated with **smoking** and environmental exposure, rather than colonic polyp formation. - While colonic polyp patients may have general increased cancer risks, lung cancer is not a direct consequence of polyps.

Question 1136: What is the recommended initial diagnostic test for a patient presenting with jaundice and pruritus who is suspected to have primary biliary cholangitis?

A. Liver biopsy
B. Serum liver function tests (Correct Answer)
C. Abdominal ultrasound
D. Anti-Mitochondrial Antibodies (AMA)

Explanation: ***Serum liver function tests*** - Serum **liver function tests (LFTs)** are essential initial diagnostic tests for evaluating patients with **jaundice** and **pruritus**, as they provide broad insights into liver health [1]. - They can indicate a **cholestatic pattern** (elevated alkaline phosphatase and gamma-glutamyl transferase) which is characteristic of **primary biliary cholangitis (PBC)** [1]. *Liver biopsy* - While a **liver biopsy** can confirm the diagnosis and stage of **PBC**, it is an **invasive procedure** and not typically the first step in diagnosis [2]. - It's usually reserved for cases where **non-invasive tests** are inconclusive or for assessing disease progression [2]. *Abdominal ultrasound* - An **abdominal ultrasound** is generally used to rule out **extrahepatic biliary obstruction**, such as **gallstones** or **tumors**, which can also cause jaundice and pruritus. - It does not directly diagnose **intrahepatic cholestatic diseases** like **PBC**. *Anti-Mitochondrial Antibodies (AMA)* - **Anti-Mitochondrial Antibodies (AMA)** are highly specific for **PBC** and are crucial for diagnosis, but they are typically ordered after initial LFTs suggest **cholestasis** [1]. - While predictive, **AMA testing** alone doesn't provide the complete picture of liver function and injury patterns that LFTs do.

Question 1137: What is the preferred initial management for duodenal ulcers?

A. Immediate surgical intervention
B. Endoscopy followed by medical therapy
C. Endoscopy as the primary initial treatment (Correct Answer)
D. Medical therapy with PPIs and H. pylori eradication

Explanation: ***Endoscopy as the primary initial treatment*** - **Endoscopy** is crucial for diagnosing duodenal ulcers, assessing their severity, identifying complications like bleeding, and guiding subsequent management [1]. - It allows for direct visualization, **biopsy** to rule out malignancy (especially for gastric ulcers), and therapeutic interventions if bleeding is present. *Immediate surgical intervention* - **Surgical intervention** is typically reserved for complications of duodenal ulcers, such as perforation, intractable bleeding unresponsive to endoscopic or medical management, or obstruction [1]. - It is not the initial preferred management for uncomplicated duodenal ulcers due to its invasiveness and associated risks. *Medical therapy with PPIs and H. pylori eradication* - **Medical therapy with PPIs** and **H. pylori eradication** is the cornerstone of long-term treatment for duodenal ulcers once diagnosed [2]. - However, **endoscopy is necessary first** to confirm the diagnosis, exclude malignancy, and assess for complications before initiating specific medical therapy. *Endoscopy followed by medical therapy* - While this option correctly identifies the sequence of endoscopy followed by medical therapy, it doesn't emphasize that **endoscopy is the critical initial diagnostic and potentially therapeutic step** before medical therapy is definitively initiated. - The phrasing *“Endoscopy as the primary initial treatment”* better captures its immediate importance for diagnosis and initial management of complications.

Question 1138: What is the preferred diagnostic test for suspected Helicobacter pylori infection?

A. Stool antigen test
B. Serology
C. Urea breath test (Correct Answer)
D. Endoscopic biopsy

Explanation: ***Urea breath test*** - The **urea breath test** is highly sensitive and specific for active *H. pylori* infection, detecting the enzyme **urease** produced by the bacteria [1]. - It's a non-invasive test often used for initial diagnosis and to confirm eradication post-treatment [1]. *Stool antigen test* - The **stool antigen test** is also non-invasive and detects *H. pylori* antigens in the stool, indicating active infection [1]. - While generally reliable, the urea breath test is often preferred due to its slightly higher sensitivity and specificity [1]. *Serology* - **Serology** detects antibodies to *H. pylori*, indicating exposure at some point, but cannot differentiate between active and past infection [1]. - Therefore, it is not suitable for confirming eradication or for initial diagnosis in regions with high prevalence where past exposure is common [1]. *Endoscopic biopsy* - **Endoscopic biopsy** involves an invasive procedure to collect tissue samples for histology, rapid urease test, or culture [1]. - While highly accurate, it is generally reserved for patients with alarm symptoms or those requiring upper endoscopy for other reasons.

Question 1139: A patient with chronic hepatitis B infection develops cirrhosis. What is the most important surveillance measure to implement?

A. Regular liver function tests
B. Ultrasound every 6 months (Correct Answer)
C. Annual CT scan
D. Biannual endoscopy

Explanation: ***Ultrasound every 6 months*** - This is the **most important** surveillance measure for patients with cirrhosis due to chronic hepatitis B, as it effectively screens for **hepatocellular carcinoma (HCC)** [1]. - Early detection of HCC through regular ultrasound significantly improves prognosis by allowing for **curative treatment options** [1]. *Regular liver function tests* - While important for monitoring overall liver health and disease progression, **liver function tests** alone are not sufficient for the early detection of **hepatocellular carcinoma (HCC)** in cirrhotic patients. - They primarily reflect liver synthetic and metabolic function, not the presence of a focal liver lesion. *Annual CT scan* - An **annual CT scan** is not typically recommended as the primary surveillance tool for HCC in cirrhotic patients due to **radiation exposure** and **cost-effectiveness** compared to ultrasound [1]. - CT scans are often used for further characterization of lesions identified on ultrasound or in cases of elevated alpha-fetoprotein [1]. *Biannual endoscopy* - **Biannual endoscopy** is primarily used to screen for and manage **esophageal varices** in cirrhotic patients, which are a common complication of portal hypertension. - While important for evaluating and preventing variceal bleeding, it does not directly screen for the development of **hepatocellular carcinoma (HCC)**.

Question 1140: A 60-year-old male with a history of chronic liver disease presents with abdominal pain and weight loss. An ultrasound reveals a hyperechoic lesion in the liver. What is the most likely diagnosis?

A. Hepatocellular carcinoma (Correct Answer)
B. Liver hemangioma
C. Metastasis
D. Hepatic adenoma

Explanation: ***Hepatocellular carcinoma*** - This diagnosis is highly suggested by the patient's **chronic liver disease** (a significant risk factor), **abdominal pain**, **weight loss**, and a **hyperechoic liver lesion** on ultrasound [1]. - It commonly arises in the setting of **cirrhosis** and is often associated with elevated **alpha-fetoprotein (AFP)** levels [1]. *Liver hemangioma* - While hemangiomas are typically **hyperechoic** on ultrasound, they are usually **asymptomatic** and do not cause weight loss or significant abdominal pain. - They are **benign vascular tumors** and are not usually associated with chronic liver disease leading to progressive symptoms. *Metastasis* - Liver metastases are common, but they typically appear as **hypoechoic** or mixed echogenicity lesions on ultrasound, rather than purely hyperechoic [2]. - Although weight loss and abdominal pain can be present, the **chronic liver disease** history strongly points towards a primary liver malignancy. *Hepatic adenoma* - Hepatic adenomas are usually seen in **young women** due to oral contraceptive use and are typically **hypoechoic** or isoechoic on ultrasound. - They are not directly linked to chronic liver disease and often present with acute pain due to hemorrhage, or are discovered incidentally.

Practice by Chapter

Esophageal Disorders

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Peptic Ulcer Disease

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Inflammatory Bowel Disease

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Irritable Bowel Syndrome

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Malabsorption Syndromes

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Pancreatitis (Acute and Chronic)

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Gastrointestinal Bleeding

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Liver Diseases and Cirrhosis

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Viral Hepatitis

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Biliary Tract Disorders

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Gastrointestinal Motility Disorders

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Gastrointestinal Malignancies

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