Gastroenterology Practice Questions

Q: A 30-year-old female presents with jaundice and itching. MRCP reveals stricturing of the intrahepatic bile ducts with beading. What is the most likely diagnosis?

Primary sclerosing cholangitis. ***Primary sclerosing cholangitis*** - The classic imaging finding of **stricturing** and **beading** in the **intrahepatic bile ducts** on MRCP is highly characteristic of **primary sclerosing cholangitis (PSC)** [1]. - **Jaundice** and **itching** are common symptoms of cholestasis, which occurs due to progressive fibrosis and inflammation of the bile ducts in PSC [2]. *Choledocholithiasis* - This condition involves **stones in the common bile duct**, which would typically appear as filling defects on MRCP rather than diffuse stricturing and beading. - While it can cause jaundice and itching, it does not explain the characteristic diffuse bile duct changes seen. *Pancreatic cancer* - Pancreatic cancer typically causes **distal common bile duct obstruction**, which would appear as an abrupt cutoff or stricture, often with upstream dilation, rather than widespread intrahepatic stricturing and beading. - Symptoms like **unexplained weight loss** and **new-onset diabetes** are more typical. *Cholangiocarcinoma* - While cholangiocarcinoma is a malignancy of the bile ducts, it usually presents as a **focal stricture** or a **mass lesion** within the bile duct system. - The widespread "beading" pattern points more towards an inflammatory-fibrotic process like PSC, although cholangiocarcinoma can sometimes develop in the context of PSC.

Q: All of the following are risk factors for gastric cancer except?

Duodenal ulcer. ***Duodenal ulcer*** - A history of **duodenal ulcers** is generally protective against gastric cancer, possibly due to the increased acid production in the duodenum or differences in the distribution of *H. pylori* strains [1]. - While *H. pylori* can cause both duodenal ulcers and gastric cancer, specific strains associated with duodenal ulcers may be less virulent in terms of oncogenic potential for the stomach [1]. *Diet high in pickled vegetables* - Diets high in **salted and pickled foods** are associated with an increased risk of gastric cancer. - These foods often contain **nitrosamines** and other carcinogenic compounds that can directly damage gastric mucosa. *Smoking* - **Smoking** is a well-established and significant risk factor for gastric cancer, increasing the risk by 1.5 to 2.5 times compared to non-smokers. - Carcinogens in tobacco smoke can reach the stomach mucosa, promoting cellular damage and malignant transformation. *Helicobacter pylori infection* - **Chronic *Helicobacter pylori* infection** is the strongest known risk factor for gastric cancer, particularly for the intestinal type [2]. - It causes chronic inflammation and atrophy of the gastric mucosa, leading to a cascade known as Correa's pathway (chronic gastritis → atrophic gastritis → intestinal metaplasia → dysplasia → carcinoma) [2].

Q: A 45-year-old male presents with upper abdominal pain, weight loss, and early satiety. Endoscopy reveals antral thickening, and biopsy shows H. pylori. What is the next step in management?

Eradication of H. pylori. ***Eradication of H. pylori*** - The presence of **H. pylori** in a patient with upper abdominal symptoms, weight loss, and **antral thickening** mandates treatment before further investigations for malignancy [1]. - Eradication of *H. pylori* is crucial as it is a major risk factor for **PUD**, **gastric adenocarcinoma**, and **MALT lymphoma**, and treatment can significantly improve symptoms and prevent disease progression [1], [2]. *Endoscopic ultrasound* - This procedure is typically used for **local staging of gastric cancer** or to evaluate submucosal lesions, but it's not the immediate next step without first addressing the *H. pylori* infection [2]. - While it could be considered later if symptoms persist despite *H. pylori* eradication, definitive diagnosis of malignancy requires deeper tissue investigation often guided by symptoms and initial findings. *CT abdomen* - A **CT scan** is primarily used for **staging gastric cancer** and detecting distant metastases, which might be considered if initial *H. pylori* treatment fails or suspicion of malignancy remains high. - It would be premature to perform a CT scan as the initial next step, given an identifiable and treatable cause (*H. pylori*) has been found. *Surgical resection* - **Surgical resection** is thedefinitive treatment for **gastric cancer**, but it is a major intervention that should only be performed after a confirmed diagnosis of malignancy and appropriate staging workup. - Performing surgery without addressing the *H. pylori* infection and fully evaluating the nature of the antral thickening would be inappropriate and potentially harmful.

Q: A patient presents with painless jaundice and a palpable gallbladder. What is the most likely diagnosis?

Pancreatic cancer. ***Pancreatic cancer*** - The combination of **painless jaundice** and a **palpable gallbladder** (Courvoisier's sign) is highly suggestive of an obstruction of the common bile duct, most commonly due to pancreatic head cancer. - The tumor in the head of the pancreas compresses the common bile duct, leading to bile back-up and distension of the gallbladder, which is often palpable and non-tender due to the slow, progressive nature of the obstruction. *Cholecystitis* - Cholecystitis typically presents with **painful right upper quadrant abdominal pain**, fever, and nausea, usually due to gallstone obstruction of the cystic duct. - While jaundice can occur if a stone migrates to the common bile duct, the prominent feature of **pain** and the common absence of a palpable, non-tender gallbladder differentiate it. *PSC* - **Primary sclerosing cholangitis (PSC)** is a chronic cholestatic liver disease characterized by progressive inflammation and fibrosis of the bile ducts, which can cause jaundice. - PSC typically doesn't present with a **palpable gallbladder**; it's often associated with inflammatory bowel disease and can lead to cholangitis or cholangiocarcinoma. *Hepatitis* - **Hepatitis** causes jaundice due to hepatocyte dysfunction and inflammation, leading to impaired bilirubin conjugation and excretion. - It usually presents with symptoms like fatigue, nausea, and dark urine, but it does **not typically cause a palpable gallbladder** because it's a hepatocellular rather than an obstructive process.

Q: A patient with chronic liver disease presents with confusion and asterixis. Ammonia levels are elevated. Diagnosis?

Hepatic encephalopathy. ***Hepatic encephalopathy*** - **Confusion**, **asterixis**, and elevated **ammonia levels** in a patient with chronic liver disease are classic signs of hepatic encephalopathy [1]. - The liver's inability to metabolize toxins, particularly ammonia, leads to their accumulation in the brain, causing neurological dysfunction [1]. *Subdural hematoma* - While it can cause confusion, it typically presents after a **head injury** and is not directly linked to elevated ammonia levels or chronic liver disease. - Would likely be accompanied by focal neurological deficits or signs of increased intracranial pressure. *Wernicke's encephalopathy* - Characterized by the triad of **oculomotor dysfunction**, **ataxia**, and **confusion**, usually due to thiamine deficiency in chronic alcoholics [2]. - It is not directly associated with elevated ammonia levels as a primary cause. *Alcohol withdrawal* - Symptoms range from tremors and anxiety to seizures and delirium tremens, often with **autonomic hyperactivity**. - While common in patients with liver disease, elevated ammonia is not the primary diagnostic marker, and asterixis is not a hallmark symptom.

Q: All of the following are complications of cirrhosis, EXCEPT:

Hypercalcemia. ***Hypercalcemia*** - While liver disease can lead to **metabolic derangements**, severe hypercalcemia is not a direct or typical complication of **cirrhosis** itself. - Causes of hypercalcemia are usually related to **parathyroid dysfunction**, **malignancy**, or specific drug effects. *Spontaneous bacterial peritonitis* - This is a common and serious infection of the **ascitic fluid** that occurs in patients with cirrhosis, often without an obvious source of infection. - It is a direct consequence of impaired immune function and bacterial translocation in **advanced liver disease**. *Portal hypertension* - This condition is a hallmark of cirrhosis, resulting from increased resistance to blood flow through the fibrotic liver [1]. - It leads to many other complications such as **ascites**, **esophageal varices**, and **splenomegaly** [1]. *Hepatic encephalopathy* - This is a neuropsychiatric syndrome caused by the accumulation of toxins normally cleared by the liver, such as **ammonia**, in the systemic circulation [1]. - It is a significant complication of **cirrhosis** and often indicates advanced liver failure [1].

Q: A patient presents with hematemesis and is diagnosed with esophageal varices. What is the first line of treatment?

Endoscopic banding. ***Endoscopic banding*** - **Endoscopic variceal ligation (EVL)**, or banding, is the **first-line treatment** for acute variceal bleeding [1]. - It involves placing elastic bands over the varices to **occlude blood flow** and prevent further hemorrhage [1]. *Surgery* - **Surgical shunting procedures** or **liver transplantation** are generally reserved for patients who fail endoscopic and pharmacologic therapies [1]. - These are **invasive options** with significant risks and are not considered first-line for acute bleeding. *Steroid therapy* - **Steroids** are typically used as **anti-inflammatory agents** and are not indicated for controlling bleeding from esophageal varices. - Their use would have **no direct impact** on stopping the hemorrhage. *Proton pump inhibitors* - **Proton pump inhibitors (PPIs)** are used to **reduce gastric acid production**, which is beneficial in conditions like peptic ulcer disease or reflux esophagitis [2]. - They are **not effective** in treating or preventing bleeding from esophageal varices, as the bleeding source is venous [2].

Q: Which of the following is NOT a recommended management strategy for acute pancreatitis?

Prolonged withholding of oral intake. ***Prolonged withholding of oral intake*** - Historically, prolonged fasting was common for **pancreatic rest**, but current evidence supports early refeeding. - **Early refeeding** (within 24-72 hours) is now recommended as it can prevent complications like gut atrophy and bacterial translocation. *Antibiotics are required only in cases of infected necrosis.* - Prophylactic antibiotics are **not recommended** in acute pancreatitis due to lack of benefit and potential to increase multi-drug resistant infections. - Antibiotics should be reserved for cases of **proven or suspected infected pancreatic necrosis**, indicated by gas on CT or positive culture from fine-needle aspiration [1]. *IV fluids are essential* - **Aggressive intravenous fluid resuscitation** is crucial, especially in the early stages, to maintain pancreatic and organ perfusion and prevent systemic complications [2]. - Initial boluses followed by continuous infusion, targeting markers like heart rate and urine output, are standard to correct **hypovolemia**. *Early enteral feeding is preferred* - **Early enteral nutrition** (usually via nasojejunal tube if oral feeding is not tolerated) is preferred over parenteral nutrition. - This helps maintain gut integrity, prevents bacterial translocation, and is associated with **fewer complications** like infection and overall shorter hospital stay.

Q: A 40-year-old presents with cirrhosis and low ferritin. What is the next step in management?

Iron supplements. ***Iron supplements*** - A patient with **cirrhosis** and **low ferritin** suggests **iron deficiency anemia**, which should be treated with iron supplementation. - Iron deficiency in cirrhosis can be due to **gastrointestinal bleeding** (e.g., from varices or portal gastropathy) [3] or **malabsorption** [2]. *Transfusion* - **Transfusion** is typically reserved for cases of **severe, symptomatic anemia** or acute significant bleeding. - In this scenario, managing the underlying iron deficiency with supplements is the initial and appropriate step. *Liver biopsy* - A **liver biopsy** is primarily used for **diagnostic purposes** to determine the cause or severity of liver disease [4]. - It is not indicated as the next step for managing **iron deficiency** in an established case of cirrhosis unless a new or unknown liver pathology is suspected [4]. *Phlebotomy* - **Phlebotomy** is a treatment for **iron overload conditions**, such as hemochromatosis, where ferritin levels would be high, not low [1]. - Using phlebotomy in a patient with low ferritin and cirrhosis would worsen their **anemia** and is contraindicated.

Q: Which of the following is the MOST common risk factor for hepatocellular carcinoma worldwide?

HBV. HBV - **Hepatitis B virus (HBV)** infection is the leading cause of **hepatocellular carcinoma (HCC)** globally, especially in regions with high endemicity like Southeast Asia and sub-Saharan Africa. - Chronic HBV infection leads to persistent **inflammation and fibrosis** in the liver, increasing the risk of malignant transformation. HCV - **Hepatitis C virus (HCV)** is a significant risk factor for HCC, particularly in Western countries. - While a major cause of chronic liver disease, its overall global prevalence as a cause of HCC is slightly lower than HBV. Alcohol - **Chronic alcohol consumption** can lead to alcoholic liver disease, cirrhosis, and subsequently increase the risk of HCC. - However, worldwide, chronic viral hepatitis (HBV and HCV) accounts for a larger proportion of HCC cases compared to alcohol-related liver disease. Aflatoxin exposure - **Aflatoxins**, particularly **aflatoxin B1**, are potent liver carcinogens produced by certain fungi (e.g., *Aspergillus flavus*) that contaminate food crops. - While significant in some regions, especially when combined with HBV infection, its global impact as a sole risk factor for HCC is less widespread compared to viral hepatitis.

Question 1

A 30-year-old female presents with jaundice and itching. MRCP reveals stricturing of the intrahepatic bile ducts with beading. What is the most likely diagnosis?

Accepted Answer

Primary sclerosing cholangitis

Answer

Choledocholithiasis

Answer

Pancreatic cancer

Answer

Cholangiocarcinoma

Question 2

All of the following are risk factors for gastric cancer except?

Accepted Answer

Duodenal ulcer

Answer

Diet high in pickled vegetables

Answer

Smoking

Answer

Helicobacter pylori infection

Question 3

A 45-year-old male presents with upper abdominal pain, weight loss, and early satiety. Endoscopy reveals antral thickening, and biopsy shows H. pylori. What is the next step in management?

Accepted Answer

Eradication of H. pylori

Answer

Endoscopic ultrasound

Answer

CT abdomen

Answer

Surgical resection

Question 4

A patient presents with painless jaundice and a palpable gallbladder. What is the most likely diagnosis?

Accepted Answer

Pancreatic cancer

Answer

Cholecystitis

Answer

PSC

Answer

Hepatitis

Question 5

A patient with chronic liver disease presents with confusion and asterixis. Ammonia levels are elevated. Diagnosis?

Accepted Answer

Hepatic encephalopathy

Answer

Subdural hematoma

Answer

Wernicke's encephalopathy

Answer

Alcohol withdrawal

Question 6

All of the following are complications of cirrhosis, EXCEPT:

Accepted Answer

Hypercalcemia

Answer

Spontaneous bacterial peritonitis

Answer

Portal hypertension

Answer

Hepatic encephalopathy

Question 7

A patient presents with hematemesis and is diagnosed with esophageal varices. What is the first line of treatment?

Accepted Answer

Endoscopic banding

Answer

Surgery

Answer

Steroid therapy

Answer

Proton pump inhibitors

Question 8

Which of the following is NOT a recommended management strategy for acute pancreatitis?

Accepted Answer

Prolonged withholding of oral intake

Answer

Antibiotics are required only in cases of infected necrosis.

Answer

IV fluids are essential

Answer

Early enteral feeding is preferred

Question 9

A 40-year-old presents with cirrhosis and low ferritin. What is the next step in management?

Accepted Answer

Iron supplements

Answer

Transfusion

Answer

Liver biopsy

Answer

Phlebotomy

Question 10

Which of the following is the MOST common risk factor for hepatocellular carcinoma worldwide?

Accepted Answer

HBV

Answer

HCV

Answer

Alcohol

Answer

Aflatoxin exposure

Gastroenterology — MCQs

Gastroenterology — MCQs

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