Gastroenterology Practice Questions

Q: A 48-year-old male with a history of cirrhosis presents with confusion and lethargy. Examination reveals asterixis, jaundice, and ascites. Laboratory results show elevated ammonia levels. What is the most likely diagnosis and appropriate treatment?

Hepatic encephalopathy; lactulose. ### Hepatic encephalopathy; lactulose - The patient's history of **cirrhosis**, coupled with **confusion, lethargy, asterixis, and elevated ammonia levels**, strongly indicates hepatic encephalopathy [1]. - **Lactulose** is the cornerstone of treatment, as it reduces ammonia absorption by acidifying the gut and promoting its excretion. ### Acute liver failure; liver transplant evaluation - While the patient has liver disease, the presentation is more chronic (cirrhosis) than acute [2]; **acute liver failure** typically presents with rapid onset of severe liver dysfunction in previously healthy individuals [3]. - This patient's long-standing cirrhosis suggests a chronic rather than acute process [2], and immediate **liver transplant evaluation** is not the primary intervention for this specific presentation. ### Wernicke's encephalopathy; IV thiamine - **Wernicke's encephalopathy** is primarily caused by **thiamine deficiency** and presents with a triad of **ophthalmoplegia, ataxia, and confusion**. - While confusion is present, the other classic signs and the elevated ammonia level are not typical for Wernicke's; the liver dysfunction is the central issue here [4]. ### Sepsis; broad-spectrum antibiotics - Although patients with cirrhosis are prone to infections, the primary symptoms (confusion, asterixis, elevated ammonia) point directly to impaired liver function rather than a systemic infection [4]. - While infection can **precipitate hepatic encephalopathy**, the immediate diagnosis and treatment should target the encephalopathy first, and there are no specific signs of infection (e.g., fever, leukocytosis) mentioned.

Q: A 45-year-old woman presents with chronic diarrhea and weight loss. She has a history of scleroderma. What is the most likely cause of her symptoms?

Small intestinal bacterial overgrowth. ***Small intestinal bacterial overgrowth*** - **Scleroderma** can lead to gut dysmotility due to fibrosis of the smooth muscle, which predisposes to **small intestinal bacterial overgrowth (SIBO)** [1]. - SIBO causes **chronic diarrhea** and **malabsorption**, leading to **weight loss**, and should be considered in patients with scleroderma and gastrointestinal symptoms [1], [2]. *Celiac disease* - **Celiac disease** is an autoimmune disorder triggered by gluten, causing villous atrophy and malabsorption, leading to diarrhea and weight loss [3]. - While it presents with similar symptoms, it is not directly linked to scleroderma and would require specific serological testing and biopsy for diagnosis [3]. *Irritable bowel syndrome* - **Irritable bowel syndrome (IBS)** is a functional gastrointestinal disorder characterized by abdominal pain, bloating, and altered bowel habits. - While it can cause chronic diarrhea, it typically does not cause significant **weight loss** and is not directly explained by the systemic effects of scleroderma. *Crohn's disease* - **Crohn's disease** is a type of inflammatory bowel disease characterized by transmural inflammation that can affect any part of the GI tract. - While it can cause chronic diarrhea and weight loss, there is no direct association between Crohn's disease and scleroderma, and the symptoms are not typically explained by the underlying pathophysiology of scleroderma.

Q: A 65-year-old male presents with a long history of gastroesophageal reflux and recent difficulty swallowing. What is the most likely diagnosis?

Esophageal cancer. ***Esophageal cancer*** - A long history of **gastroesophageal reflux disease (GERD)** is a significant risk factor for developing **Barrett's esophagus**, which can progress to **adenocarcinoma of the esophagus** [1]. - **Progressive dysphagia** (difficulty swallowing) in an older patient with a strong GERD history raises high suspicion for esophageal cancer [1]. *Peptic stricture* - While chronic GERD can lead to **peptic strictures**, which cause dysphagia, the advanced age and the term "recent" difficulty swallowing make cancer a more concerning diagnosis given the risk factors [2]. - Peptic strictures typically cause **gradual, slow-onset dysphagia**, and while they are a common complication of GERD, they are less likely to be the "most likely" cause of new, troublesome dysphagia in this context compared to cancer [1]. *Achalasia* - **Achalasia** is a motility disorder characterized by incomplete relaxation of the lower esophageal sphincter and loss of peristalsis, leading to dysphagia for both solids and liquids [3]. - It is not directly linked to a long history of GERD and typically presents with symptoms like regurgitation of undigested food, chest pain, and weight loss, without the direct precursor of chronic reflux damage to the esophageal lining [3]. *Esophagitis* - **Chronic esophagitis** from GERD is common, but it usually presents with heartburn and odynophagia (painful swallowing), not typically with significant dysphagia as the primary new symptom, unless it's severe and causing narrowing or ulceration [2]. - While esophagitis is a precursor to more severe complications, the onset of "difficulty swallowing" suggests a more advanced structural or neoplastic change rather than just inflammation.

Q: In a patient with acute pancreatitis showing elevated serum amylase, which enzyme elevation would be most specific to pancreatic damage?

Elevated Lipase levels. ***Elevated Lipase levels*** - **Lipase** is significantly more **specific to the pancreas** than amylase, making its elevation a more reliable indicator of pancreatic damage. - While amylase can be elevated due to various conditions (e.g., salivary gland issues), lipase elevation primarily points to **pancreatitis** [1]. *Elevated Alanine transaminase (ALT) levels* - **ALT** is primarily an indicator of **hepatocellular damage**, not pancreatic damage. - While gallstone pancreatitis might cause transient ALT elevation, it's not a direct marker of pancreatic injury. *Elevated Alkaline phosphatase levels* - **Alkaline phosphatase (ALP)** is typically associated with **biliary obstruction** or bone disease. - Although it can be elevated in pancreatitis with biliary involvement, it is not a specific marker for pancreatic damage itself. *Elevated Aspartate transaminase (AST) levels* - **AST** is found in many tissues, including the liver, heart, and skeletal muscle. - Elevated AST levels predominantly suggest **liver damage** or other tissue injury, not specifically pancreatic damage.

Q: A 45-year-old male with a history of chronic hepatitis C presents with abdominal distension, jaundice, and lower extremity edema. Laboratory tests reveal low serum albumin and prolonged prothrombin time. Which of the following is the most likely diagnosis?

Cirrhosis. Cirrhosis - The constellation of **abdominal distension** (ascites), **jaundice**, and **lower extremity edema** in a patient with chronic hepatitis C strongly suggests **decompensated cirrhosis** [1]. - **Low serum albumin** indicates impaired synthetic function of the liver, and **prolonged prothrombin time** reflects reduced production of clotting factors, both characteristic features of cirrhosis [1]. *Acute viral hepatitis* - While acute viral hepatitis can cause jaundice and liver inflammation, it typically does not lead to **ascites** or **edema** in its acute phase, nor does it commonly result in significant **synthetic dysfunction** as indicated by low albumin and prolonged PT. - The history of **chronic hepatitis C** points towards a long-standing liver disease process rather than an acute infection [1]. *Hepatocellular carcinoma* - Although **hepatocellular carcinoma (HCC)** can develop as a complication of chronic hepatitis C and cirrhosis, the primary presentation here with signs of liver synthetic dysfunction like **low albumin** and **prolonged PT** is more indicative of **underlying cirrhosis** itself causing these features. - HCC symptoms often involve worsening pain, weight loss, or a new mass, which are not explicitly mentioned as primary complaints. *Primary biliary cholangitis* - **Primary biliary cholangitis (PBC)** is an autoimmune liver disease that primarily affects the small bile ducts, leading to cholestasis and eventually cirrhosis [1]. - While it can manifest with jaundice and lead to cirrhosis, it is usually associated with specific serological markers like **anti-mitochondrial antibodies (AMA)** and is less directly linked to **chronic hepatitis C** as the primary underlying cause for the presented symptoms.

Q: A 50-year-old woman with cirrhosis presents with ascites and lower extremity edema. Which management approach would best reduce her complications?

Diuretic therapy with sodium restriction. Diuretic therapy with sodium restriction [1] - Diuretic therapy, especially with spironolactone and a loop diuretic (e.g., furosemide), is the cornerstone of managing ascites and edema in cirrhosis by promoting fluid excretion [1]. - Sodium restriction is crucial as sodium retention is a primary driver of fluid overload and ascites formation in cirrhosis [1]. Paracentesis followed by albumin infusion - Paracentesis is indicated for large-volume ascites causing discomfort or respiratory compromise, but it's not the primary long-term management strategy for routine ascites unless diuretics fail. - Albumin infusion is typically given with large-volume paracentesis (>5 liters) to prevent post-paracentesis circulatory dysfunction, rather than as a standalone fluid management approach. High-protein diet and exercise - A high-protein diet can worsen hepatic encephalopathy in patients with severe cirrhosis and may not be beneficial for fluid overload. - Exercise is generally beneficial but does not directly address the pathophysiology of ascites and edema in cirrhosis. Transjugular intrahepatic portosystemic shunt - A TIPS procedure is reserved for refractory ascites that does not respond to maximal diuretic therapy or for complications like recurrent variceal bleeding. - It carries significant risks, including an increased risk of hepatic encephalopathy and is not a first-line therapy for uncomplicated ascites and edema.

Q: A 48-year-old male presents with abdominal pain, bloating, and diarrhea, with symptoms worsening after the consumption of wheat-containing foods. What is the most likely diagnosis?

Celiac disease. ***Celiac disease*** - **Celiac disease** is characterized by an immune reaction to **gluten** (a protein found in wheat, barley, and rye), leading to damage in the small intestine [1]. This perfectly aligns with symptoms worsening after consuming wheat. - Common symptoms include **abdominal pain, bloating, and diarrhea**, which can vary in severity [1]. Diagnosis is often confirmed by specific antibody tests and small bowel biopsy. *Irritable bowel syndrome (IBS)* - While IBS can present with **abdominal pain, bloating, and altered bowel habits** [2], it does not typically involve a direct worsening of symptoms specifically tied to **wheat consumption** due to an immune reaction to gluten. - IBS is a **functional gastrointestinal disorder** without structural damage to the bowel, unlike celiac disease [2]. *Crohn's disease* - **Crohn's disease** is an **inflammatory bowel disease (IBD)** that can affect any part of the gastrointestinal tract, causing inflammation and damage. - While symptoms like abdominal pain and diarrhea are common, they are generally not specifically triggered or exacerbated by **wheat consumption** in the same way as celiac disease. *Ulcerative colitis* - **Ulcerative colitis** is another type of **inflammatory bowel disease (IBD)** that primarily affects the **colon and rectum**, causing inflammation and ulceration. - Symptoms usually include bloody diarrhea, tenesmus, and abdominal pain but are not typically linked to a specific trigger like **wheat** in the way experienced by individuals with celiac disease.

Q: A 45-year-old female with no past medical history presents with jaundice. Laboratory results show increased bilirubin, predominantly direct, and normal liver enzymes. An abdominal ultrasound reveals dilated intrahepatic bile ducts but no gallstones. What is the most appropriate next step in management?

MRCP. ***MRCP*** - **MRCP (Magnetic Resonance Cholangiopancreatography)** is the most appropriate next step given the presence of **dilated intrahepatic bile ducts** and **obstructive jaundice** without gallstones on initial ultrasound. [1] - It non-invasively provides detailed imaging of the entire biliary tree, helping to identify the level and cause of obstruction, such as a mass or stricture, without the risks of an invasive procedure. [1] *Liver biopsy* - A **liver biopsy** is typically indicated for parenchymal liver diseases, elevated liver enzymes, or to stage fibrosis, none of which are the primary concern here with **normal liver enzymes** and direct hyperbilirubinemia suggesting obstruction. [2] - It would not help to identify the cause of the **biliary obstruction** and carries risks such as bleeding and infection. [2] *ERCP* - **ERCP (Endoscopic Retrograde Cholangiopancreatography)** is an **invasive procedure** with therapeutic potential, such as stent placement or stone removal. [1] - While it can diagnose biliary obstruction, it is more appropriately used **after a non-invasive imaging study** like MRCP has localized the obstruction, or when therapeutic intervention is immediately indicated. *Repeat abdominal ultrasound in 6 months* - Repeating the ultrasound in 6 months would significantly **delay diagnosis and treatment** for a potentially serious cause of biliary obstruction. - Jaundice, especially with dilated ducts, requires prompt investigation to rule out conditions like cholangiocarcinoma or other obstructive lesions.

Q: A 55-year-old man with a 2-week history of jaundice, weight loss, and epigastric pain has a CT scan showing a pancreatic head mass. What is the next step?

Endoscopic ultrasound with biopsy. ***Endoscopic ultrasound with biopsy*** - EUS with **biopsy** is the most accurate method for tissue diagnosis of a pancreatic head mass, which is crucial for confirming malignancy and guiding treatment [2]. - It allows for direct visualization of the mass and surrounding structures, providing information on resectability. *ERCP with stent placement* - **ERCP with stent placement** is primarily a therapeutic measure to relieve biliary obstruction causing jaundice, not a diagnostic step for the mass itself [1]. - While it may be performed if the patient's **jaundice** is severe, it would typically follow, or be combined with, diagnostic biopsy [1]. *Immediate surgery* - **Immediate surgery** is inappropriate without a definitive tissue diagnosis and assessment of resectability. - A pancreatic head mass could be benign, or the malignancy could be unresectable due to invasion or metastasis, requiring neoadjuvant therapy. *Chemotherapy* - **Chemotherapy** is typically initiated after a confirmed diagnosis of malignancy and thorough staging, usually in the context of advanced or unresectable disease. - It would not be the initial step after identifying a mass on CT scan.

Question 1

A 48-year-old male with a history of cirrhosis presents with confusion and lethargy. Examination reveals asterixis, jaundice, and ascites. Laboratory results show elevated ammonia levels. What is the most likely diagnosis and appropriate treatment?

Accepted Answer

Hepatic encephalopathy; lactulose

Answer

Acute liver failure; liver transplant evaluation

Answer

Wernicke's encephalopathy; IV thiamine

Answer

Sepsis; broad-spectrum antibiotics

Question 2

A 45-year-old woman presents with chronic diarrhea and weight loss. She has a history of scleroderma. What is the most likely cause of her symptoms?

Accepted Answer

Small intestinal bacterial overgrowth

Answer

Celiac disease

Answer

Irritable bowel syndrome

Answer

Crohn's disease

Question 3

A 65-year-old male presents with a long history of gastroesophageal reflux and recent difficulty swallowing. What is the most likely diagnosis?

Accepted Answer

Esophageal cancer

Answer

Peptic stricture

Answer

Achalasia

Answer

Esophagitis

Question 4

In a patient with acute pancreatitis showing elevated serum amylase, which enzyme elevation would be most specific to pancreatic damage?

Accepted Answer

Elevated Lipase levels

Answer

Elevated Alanine transaminase (ALT) levels

Answer

Elevated Alkaline phosphatase levels

Answer

Elevated Aspartate transaminase (AST) levels

Question 5

A 45-year-old male with a history of chronic hepatitis C presents with abdominal distension, jaundice, and lower extremity edema. Laboratory tests reveal low serum albumin and prolonged prothrombin time. Which of the following is the most likely diagnosis?

Accepted Answer

Cirrhosis

Answer

Acute viral hepatitis

Answer

Hepatocellular carcinoma

Answer

Primary biliary cholangitis

Question 6

A 50-year-old woman with cirrhosis presents with ascites and lower extremity edema. Which management approach would best reduce her complications?

Accepted Answer

Diuretic therapy with sodium restriction

Answer

Paracentesis followed by albumin infusion

Answer

High-protein diet and exercise

Answer

Transjugular intrahepatic portosystemic shunt

Question 7

A 48-year-old male presents with abdominal pain, bloating, and diarrhea, with symptoms worsening after the consumption of wheat-containing foods. What is the most likely diagnosis?

Accepted Answer

Celiac disease

Answer

Irritable bowel syndrome

Answer

Crohn's disease

Answer

Ulcerative colitis

Question 8

A 45-year-old female with no past medical history presents with jaundice. Laboratory results show increased bilirubin, predominantly direct, and normal liver enzymes. An abdominal ultrasound reveals dilated intrahepatic bile ducts but no gallstones. What is the most appropriate next step in management?

Accepted Answer

MRCP

Answer

Liver biopsy

Answer

ERCP

Answer

Repeat abdominal ultrasound in 6 months

Question 9

A 55-year-old man with a 2-week history of jaundice, weight loss, and epigastric pain has a CT scan showing a pancreatic head mass. What is the next step?

Accepted Answer

Endoscopic ultrasound with biopsy

Answer

ERCP with stent placement

Answer

Immediate surgery

Answer

Chemotherapy

Question 10

In a 62-year-old male with a history of alcohol use disorder presenting with severe epigastric pain radiating to the back, vomiting, and laboratory results indicating elevated amylase and lipase, which approach is preferred for nutritional support?

Accepted Answer

Early enteral feeding to maintain gut integrity and reduce infection risk

Answer

Parenteral nutrition to rest the pancreas

Answer

NPO with IV fluids, consider enteral feeding after 72 hours

Answer

Total parenteral nutrition immediately

Gastroenterology — MCQs

Gastroenterology — MCQs

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