Gastroenterology — MCQs

Gastroenterology Indian Medical PG Practice Questions and MCQs

Question 1091: A 70-year-old male with a history of chronic constipation now presents with a sudden onset of left lower quadrant pain. A CT scan shows thickened colon walls with pericolonic fat stranding. What is the likely diagnosis and the most appropriate treatment?

A. Acute appendicitis, surgical intervention
B. Ischemic colitis, supportive care
C. Colon cancer, surgical resection
D. Diverticulitis, antibiotics and possible surgical intervention (Correct Answer)

Explanation: Diverticulitis, antibiotics and possible surgical intervention - The patient's age, history of chronic constipation, sudden onset of left lower quadrant pain, and CT findings of thickened colon walls with pericolonic fat stranding are classic for diverticulitis [1]. - Initial treatment often involves antibiotics and bowel rest; however, severe cases or complications like perforation may require surgical intervention [1]. *Acute appendicitis, surgical intervention* - Acute appendicitis typically presents with right lower quadrant pain and rarely affects a 70-year-old male with thickened colon walls and pericolonic fat stranding in the left lower quadrant [1]. - While surgical intervention is common for appendicitis, the clinical presentation here is inconsistent with the diagnosis. *Ischemic colitis, supportive care* - Ischemic colitis can cause abdominal pain, often with bloody diarrhea, but the CT findings of thickened colon walls and pericolonic fat stranding are less specific for ischemia and more indicative of an inflammatory process like diverticulitis [2]. - While supportive care is a component of treatment, it doesn't align with the primary diagnosis suggested by the imaging and localized pain. *Colon cancer, surgical resection* - Colon cancer can cause abdominal pain and changes in bowel habits, but the sudden onset of pain and the inflammatory changes on CT (pericolonic fat stranding) are more characteristic of an acute inflammatory process rather than an acute presentation of cancer. - Although surgical resection is the primary treatment for colon cancer, the acute inflammatory CT findings do not point to this as the immediate and likely diagnosis.

Question 1092: A 50-year-old man with a history of hypertension and smoking presents with a 3-month history of progressive dysphagia and weight loss. What is the most appropriate next step in management?

A. Barium swallow
B. Endoscopy with biopsy (Correct Answer)
C. CT scan of the chest
D. Esophageal manometry

Explanation: ***Endoscopy with biopsy*** - Progressive **dysphagia** and **weight loss** in a patient with risk factors like **smoking** and age (50 years old) strongly suggest an esophageal malignancy, which requires direct visualization and tissue sampling for definitive diagnosis. - An endoscopy allows for direct visualization of the esophageal mucosa, identification of any lesions, and immediate **biopsies** for histopathological examination [1]. *Barium swallow* - While a barium swallow can identify structural abnormalities and strictures, it provides only indirect evidence and cannot reliably differentiate between **benign** and **malignant** causes of dysphagia [1]. - It does not allow for tissue sampling, which is crucial for diagnosing cancer. *CT scan of the chest* - A CT scan is primarily used for **staging** a known malignancy and assessing for local or distant **metastasis**, not for initial diagnosis of the primary lesion. - It may show a mass, but it cannot definitively diagnose the type of lesion or provide cellular information. *Esophageal manometry* - Esophageal manometry measures the **motor function** of the esophagus and is primarily used to diagnose **motility disorders** such as achalasia or esophageal spasm. - It would not be the first-line investigation for dysphagia with **red flag symptoms** like weight loss, which suggest a structural and potentially malignant cause [1].

Question 1093: In a patient with acute pancreatitis, which finding would suggest the development of necrotizing pancreatitis?

A. Elevated lipase
B. Jaundice
C. Hypocalcemia (Correct Answer)
D. Leukocytosis

Explanation: ***Hypocalcemia*** - **Hypocalcemia** is a common and concerning complication in severe acute pancreatitis, often indicating **fat saponification** in areas of necrosis. - The formation of **calcium soaps** due to the necrotic release of fatty acids binds to calcium, leading to serum calcium depletion. *Elevated lipase* - **Elevated lipase** is a hallmark of acute pancreatitis overall, indicating pancreatic inflammation and enzyme release. - It does not specifically differentiate between **interstitial edematous pancreatitis** and **necrotizing pancreatitis**. *Jaundice* - **Jaundice** in acute pancreatitis typically suggests **biliary obstruction** (e.g., gallstones obstructing the common bile duct). - While it can be present in severe pancreatitis, it is not a direct indicator of **pancreatic necrosis**. *Leukocytosis* - **Leukocytosis** is a general sign of inflammation and infection, commonly seen in acute pancreatitis due to the systemic inflammatory response. - While often present in **severe pancreatitis** including necrotizing forms, it is not specific enough to diagnose **necrosis**.

Question 1094: A 60-year-old male presents with jaundice, pruritus, and hepatomegaly. Laboratory tests reveal elevated bilirubin and alkaline phosphatase levels. An MRI shows strictures of the bile ducts. What is the most likely diagnosis?

A. Primary sclerosing cholangitis (Correct Answer)
B. Gallstones
C. Cholangitis
D. Primary biliary cholangitis

Explanation: ***Primary sclerosing cholangitis*** - The combination of **jaundice, pruritus, hepatomegaly**, elevated **alkaline phosphatase**, and characteristic **bile duct strictures** on MRI strongly points to primary sclerosing cholangitis [1]. - This condition is characterized by **inflammation and fibrosis** of the bile ducts, leading to progressive narrowing and obstruction. *Primary biliary cholangitis* - While it causes **jaundice, pruritus**, and elevated **alkaline phosphatase**, it primarily affects **small intrahepatic bile ducts** and does not typically show widespread strictures in larger bile ducts on MRI [2]. - It is more common in **middle-aged women** and is associated with **anti-mitochondrial antibodies** [2]. *Gallstones* - **Gallstones** can cause **jaundice, pruritus**, and elevated **alkaline phosphatase** if they obstruct the bile ducts. - However, MRI would typically show an **obstructing stone** rather than diffuse strictures and beads-on-a-string appearance characteristic of PSC. *Cholangitis* - **Cholangitis** refers to an infection of the bile ducts, often presenting with **fever, abdominal pain, jaundice (Charcot's triad)**, and elevated inflammatory markers. - While it can cause bile duct inflammation and some narrowing, recurrent or diffuse strictures as seen in PSC are not typical, and the primary cause is usually an **obstruction by a stone or tumor**.

Question 1095: A patient with a long-standing history of ulcerative colitis presents with an increasing frequency of bowel movements, nocturnal bowel movements, and rectal bleeding. What is the most appropriate next step in management?

A. Total colectomy
B. Increase in dietary fiber
C. Initiation of corticosteroids (Correct Answer)
D. Enhanced surveillance colonoscopy

Explanation: ***Initiation of corticosteroids*** - The patient's symptoms (increasing frequency of bowel movements, nocturnal bowel movements, rectal bleeding) indicate a **flare-up of ulcerative colitis**, which often requires systemic anti-inflammatory treatment [1]. - **Corticosteroids** are highly effective in inducing remission during active flares of moderate to severe ulcerative colitis by suppressing inflammation [1]. *Total colectomy* - **Total colectomy** is a surgical option reserved for cases of severe, refractory ulcerative colitis that do not respond to medical therapy, or in cases of dysplasia/cancer [1]. - It is generally considered after failure of optimal medical management, not as the initial step for an acute flare [1]. *Increase in dietary fiber* - Increasing dietary fiber can worsen symptoms during an **active flare of ulcerative colitis** and is not recommended as a treatment strategy for acute inflammation. - While fiber can be beneficial in maintaining remission in some patients with inflammatory bowel disease (IBD), it is not appropriate for an acute flare. *Enhanced surveillance colonoscopy* - **Enhanced surveillance colonoscopy** is indicated for monitoring for dysplasia or colorectal cancer in patients with long-standing ulcerative colitis, not for acute management of a flare. - The immediate priority is to control the active inflammation and alleviate the patient's symptoms.

Question 1096: A 50-year-old man presents with severe abdominal pain and blood in the stool. Endoscopy reveals multiple ulcerations in the stomach and duodenum, and a biopsy shows Helicobacter pylori infection. What is the most likely diagnosis?

A. Peptic ulcer disease (Correct Answer)
B. Gastric carcinoma
C. Zollinger-Ellison syndrome
D. Crohn's disease

Explanation: ***Peptic ulcer disease*** - The presence of **multiple ulcerations** in the stomach and duodenum, coupled with a **Helicobacter pylori infection**, is highly indicative of peptic ulcer disease [1]. - **H. pylori** is a major causative agent of peptic ulcers, leading to inflammation and damage to the gastric and duodenal mucosa [1]. *Gastric carcinoma* - While gastric carcinoma can present with abdominal pain and bleeding, the primary finding of **multiple ulcerations** and a direct link to **H. pylori** points more specifically to peptic ulcer disease. - A biopsy would typically show **malignant cells** in gastric carcinoma, not just H. pylori infection in the ulcer beds. *Zollinger-Ellison syndrome* - This syndrome involves a **gastrin-secreting tumor** (gastrinoma) leading to severe acid hypersecretion and typically **multiple and intractable ulcers**, often in unusual locations. - While it can cause multiple ulcers, the direct finding of **H. pylori** infection makes peptic ulcer disease a more straightforward and common diagnosis in this context. *Crohn's disease* - Crohn's disease is an **inflammatory bowel disease** that can affect any part of the GI tract, but it is less commonly observed with multiple **gastric and duodenal ulcerations** as the primary presentation. - Additionally, Crohn's disease would typically present with **transmural inflammation**, granulomas, and specific endoscopic findings not described in this scenario [2].

Question 1097: A 40-year-old female presents with jaundice, pruritus, and right upper quadrant pain. Laboratory results show elevated bilirubin, alkaline phosphatase, and gamma-glutamyl transferase. Ultrasound reveals dilated intrahepatic bile ducts. Analyze and determine the diagnosis and the next step.

A. Choledocholithiasis; MRCP (Correct Answer)
B. Primary biliary cholangitis; liver biopsy
C. Acute hepatitis; LFTs and viral serologies
D. Pancreatic cancer; CT abdomen

Explanation: ***Choledocholithiasis; MRCP*** - The patient's symptoms of **jaundice**, **pruritus**, and **right upper quadrant pain**, coupled with elevated **bilirubin**, **alkaline phosphatase**, and **gamma-glutamyl transferase**, are highly suggestive of **biliary obstruction** [1]. The ultrasound finding of **dilated intrahepatic bile ducts** further points to a blockage within the biliary system [1]. - **MRCP (Magnetic Resonance Cholangiopancreatography)** is the most appropriate next step as it is a non-invasive imaging technique that provides detailed images of the biliary and pancreatic ducts, allowing for precise identification and localization of stones in the common bile duct, which is consistent with **choledocholithiasis** [1]. *Primary biliary cholangitis; liver biopsy* - While primary biliary cholangitis (PBC) can cause **pruritus** and elevated **alkaline phosphatase**, it typically presents with **intrahepatic bile duct destruction** and often has a positive anti-mitochondrial antibody (AMA). The ultrasound showing **dilated intrahepatic bile ducts** makes PBC less likely as it's primarily a disease of small intrahepatic ducts that wouldn't necessarily appear dilated. - A **liver biopsy** is primarily used to confirm the diagnosis of PBC and assess disease progression, but it wouldn't be the initial diagnostic step in a patient with acute obstructive symptoms and dilated ducts on imaging. *Acute hepatitis; LFTs and viral serologies* - **Acute hepatitis** typically presents with elevated **transaminases (AST, ALT)** significantly more than alkaline phosphatase [2], and while it can cause jaundice, it does not usually cause **dilated bile ducts** or prominent **pruritus** due to obstruction. - **LFTs and viral serologies** are indeed part of the workup for hepatitis, but the clinical picture with prominent biliary obstruction findings points away from acute hepatitis as the primary diagnosis [2]. *Pancreatic cancer; CT abdomen* - Pancreatic cancer can cause **jaundice** due to bile duct obstruction, but it often presents with additional symptoms like **weight loss**, **abdominal pain radiating to the back**, and sometimes a palpable mass [3]. While **dilated bile ducts** can be seen, pancreatic cancer is less likely to be the immediate cause given the acute presentation without other chronic symptoms. - A **CT abdomen** is useful for identifying pancreatic masses, but in the context of acutely dilated intrahepatic ducts, a less invasive and more specific investigation for biliary pathology, like MRCP, is often preferred first to rule out choledocholithiasis before pursuing pancreatic malignancy as the primary cause [3].

Question 1098: A 55-year-old male with Barrett's esophagus presents with progressive dysphagia primarily to solids. What is the most appropriate management strategy to address his condition?

A. Lifestyle modifications including diet changes
B. High-dose proton pump inhibitor therapy
C. Esophageal dilation
D. Urgent upper endoscopy to evaluate for malignancy (Correct Answer)

Explanation: ***Urgent upper endoscopy to evaluate for malignancy*** - Progressive **dysphagia to solids** in a patient with a history of **Barrett's esophagus** is a strong indicator of potential malignant transformation, requiring immediate investigation [1]. - Barrett's esophagus is a **premalignant condition**, and new-onset or worsening dysphagia mandates prompt endoscopic evaluation to rule out **esophageal adenocarcinoma** [2]. *Esophageal dilation* - While esophageal dilation is used for **benign strictures** causing dysphagia, it should not be performed without first ruling out malignancy, especially in high-risk patients [1]. - Dilating a malignant stricture can lead to **perforation** or delay the diagnosis and treatment of cancer. *High-dose proton pump inhibitor therapy* - **Proton pump inhibitors (PPIs)** are crucial for managing GERD and preventing the progression of Barrett's esophagus, but they do not address mechanical obstruction from a stricture or tumor. - While PPIs might reduce esophageal inflammation, they will not relieve dysphagia caused by a **structural abnormality** and could delay critical diagnostic steps. *Lifestyle modifications including diet changes* - **Lifestyle modifications** are important for managing GERD and symptoms associated with Barrett's esophagus but are insufficient to address progressive dysphagia, which suggests a mechanical obstruction. - Relying solely on diet changes would significantly delay the necessary diagnostic evaluation for a potentially **malignant cause** of dysphagia.

Question 1099: A 70-year-old male with a history of chronic liver disease presents with fever, jaundice, and right upper quadrant pain. Laboratory tests show elevated liver enzymes and bilirubin. What is the most appropriate next step in management?

A. CT scan of the abdomen
B. Percutaneous liver biopsy
C. ERCP
D. Empirical antibiotics (Correct Answer)

Explanation: **Empirical antibiotics** - The patient's presentation with **fever, jaundice, and right upper quadrant pain** (Charcot's triad) is highly suggestive of **acute cholangitis**, a severe bacterial infection of the bile ducts [1]. - Immediate administration of **empirical broad-spectrum antibiotics** is crucial to prevent sepsis and rapid clinical deterioration, especially in a patient with chronic liver disease who is often immunocompromised. *CT scan of the abdomen* - While a CT scan can provide detailed imaging of the biliary system and surrounding organs, it is not the most immediate next step when acute cholangitis is suspected. - It can help confirm the diagnosis and identify the cause of obstruction, but antibiotic therapy should not be delayed by imaging. *ERCP* - **Endoscopic Retrograde Cholangiopancreatography (ERCP)** is a diagnostic and therapeutic procedure used to relieve biliary obstruction, such as removing stones or placing stents [1]. - However, ERCP is an invasive procedure with potential risks and should only be performed after the patient has been stabilized with antibiotics, as it can worsen infection if performed too early. *Percutaneous liver biopsy* - A **percutaneous liver biopsy** is primarily used for diagnosing diffuse liver diseases or specific conditions like hepatitis, fibrosis, or liver masses. - It is an invasive procedure and is contraindicated in acute cholangitis due to the risk of exacerbating the infection and potential bleeding complications [2], and it would not address the immediate life-threatening issue.

Question 1100: A 68-year-old man presents with difficulty swallowing and weight loss. Esophagogastroduodenoscopy reveals a mass in the lower esophagus, and a biopsy shows adenocarcinoma. What is the most likely risk factor?

A. Barrett's esophagus (Correct Answer)
B. Cigarette smoking
C. Iron deficiency anemia with esophageal webs
D. Esophageal dilation due to achalasia

Explanation: ***Barrett's esophagus*** - This condition is characterized by **intestinal metaplasia** in the lower esophagus, which is a precursor to **esophageal adenocarcinoma** [1]. - Chronic gastroesophageal reflux disease (GERD) is often associated with Barrett's esophagus, significantly increasing the risk of developing cancer in affected individuals [1]. *Achalasia* - Achalasia leads to **esophageal dilation** and difficulty swallowing but is less directly associated with esophageal adenocarcinoma compared to Barrett's esophagus. - It primarily results in **lower esophageal sphincter dysfunction**, not metaplasia or more direct carcinogenic changes. *Smoking* - While smoking is a risk factor for various cancers, it is more strongly associated with **squamous cell carcinoma** of the esophagus than with adenocarcinoma [1]. - Adenocarcinoma risk is more prominently linked to conditions like Barrett's esophagus due to reflux. *Plummer-Vinson syndrome* - This syndrome is characterized by **dysphagia**, **iron deficiency anemia**, and **esophageal webs**, but it is less commonly linked to esophageal cancer compared to Barrett's esophagus. - The association with cancer is weak and primarily seen with **squamous cell carcinoma** rather than adenocarcinoma.

Practice by Chapter

Esophageal Disorders

Practice Questions

Peptic Ulcer Disease

Practice Questions

Inflammatory Bowel Disease

Practice Questions

Irritable Bowel Syndrome

Practice Questions

Malabsorption Syndromes

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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

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