Gastroenterology — MCQs

Gastroenterology Indian Medical PG Practice Questions and MCQs

Question 1101: A patient with severe liver disease presents with jaundice and coagulopathy. Which of the following physiological functions of the liver is most likely to be impaired?

A. Glycogen storage
B. Bile acid synthesis
C. Vitamin K-dependent clotting factor production (Correct Answer)
D. Albumin synthesis

Explanation: ***Vitamin K-dependent clotting factor production*** - The liver is responsible for synthesizing **vitamin K-dependent clotting factors** (II, VII, IX, X) [1]. Impairment leads to coagulopathy and increased bleeding risk, as seen in this patient [2]. - Severe liver disease significantly reduces the liver's capacity to produce these factors, directly contributing to the patient's **coagulopathy**. *Glycogen storage* - While the liver stores glycogen, impairment in this function primarily affects **glucose homeostasis**, potentially leading to hypoglycemia, not directly jaundice and coagulopathy [2]. - Although the liver's metabolic functions are generally compromised in severe disease, **glycogen storage** is not the primary cause of the presenting symptoms of jaundice and coagulopathy. *Bile acid synthesis* - The liver synthesizes bile acids, which are crucial for **fat digestion and absorption**. Impaired synthesis can lead to malabsorption, but **jaundice** is typically caused by impaired bile excretion, not primarily impaired synthesis [2]. - While bile acid synthesis is affected, the most direct and severe manifestation that explains both **jaundice and coagulopathy** points to clotting factor production and bilirubin metabolism rather than just bile acid synthesis. *Albumin synthesis* - The liver synthesizes albumin, a major plasma protein responsible for **maintaining oncotic pressure** [2]. Impaired albumin synthesis leads to edema and ascites, but not directly jaundice. - While **hypoalbuminemia** is common in severe liver disease, it doesn't directly cause jaundice (which reflects bilirubin accumulation) or coagulopathy (which reflects clotting factor deficiencies) [2].

Question 1102: A 72-year-old woman presents with confusion and a history of alcohol use. Laboratory results show elevated liver enzymes and prolonged prothrombin time. Which liver condition is most likely responsible?

A. Cirrhosis (Correct Answer)
B. Hepatitis C infection
C. Alcoholic hepatitis
D. Primary biliary cholangitis

Explanation: ***Cirrhosis*** - The patient's **confusion** and **prolonged prothrombin time** indicate impaired liver function, commonly seen in cirrhosis [1]. - **Chronic alcohol use** can lead to liver fibrosis and ultimately cirrhosis [1], resulting in complications such as hepatic encephalopathy [1]. *Hepatitis C infection* - While can lead to liver dysfunction, it typically does not present with **prolonged prothrombin time** without prior cirrhotic change. - Confusion and liver enzyme elevation are more indicative of progressed liver disease rather than acute hepatitis, which is usually self-limiting. *Alcoholic hepatitis* - This condition often presents with **acute liver inflammation** and can cause elevated liver enzymes, but is less likely to cause confusion unless it progresses to cirrhosis. - It presents with a more rapid decline in health and may show **jaundice**, as opposed to the chronic nature seen in this patient. *Primary biliary cholangitis* - Generally associated with **autoimmune conditions** and leads to gradual damage from cholestasis, not primarily related to alcohol use. - Key features like **pruritus** and **fatigue** may be dominant, but they do not explain the acute confusion and prolonged prothrombin time as clearly as cirrhosis does.

Question 1103: A 45-year-old woman with a history of liver disease presents with tremors, difficulty walking, and jaundice. Laboratory tests reveal elevated serum copper levels. What is the most likely diagnosis?

A. Hemochromatosis
B. Wilson’s Disease (Correct Answer)
C. Primary biliary cirrhosis
D. Alpha-1 antitrypsin deficiency

Explanation: ***Wilson’s Disease*** - The combination of **liver disease**, **neurological symptoms** (tremors, difficulty walking), and **elevated serum copper** is highly characteristic of Wilson's Disease, a disorder of copper metabolism [1]. - Patients often present with **jaundice** due to hepatic dysfunction and may have **Kayser-Fleischer rings** in the eyes, although not mentioned here [1]. *Hemochromatosis* - This condition involves **iron overload**, leading to symptoms such as fatigue, joint pain, and liver dysfunction (e.g., cirrhosis). - It does **not involve copper accumulation**, and neurological symptoms like tremors are not typical. *Primary biliary cirrhosis* - Characterized by destruction of **small bile ducts** within the liver, often presenting with fatigue, pruritus, and elevated **alkaline phosphatase**. - While it affects the liver, it does **not involve copper accumulation** or neurological symptoms like tremors. *Alpha-1 antitrypsin deficiency* - This genetic disorder primarily affects the **lungs** (emphysema) and **liver** (cirrhosis) due to a deficiency in the protective protein alpha-1 antitrypsin. - It does **not cause copper accumulation** or the specific neurological symptoms seen in Wilson's disease.

Question 1104: A 55-year-old male with a history of chronic alcohol use presents with upper gastrointestinal bleeding and elevated liver enzymes. What is the most likely source of the bleeding?

A. Esophageal varices (Correct Answer)
B. Peptic ulcer
C. Gastric cancer
D. Mallory-Weiss tear

Explanation: ***Esophageal varices*** - **Chronic alcohol use** is a major risk factor for **cirrhosis**, leading to portal hypertension and the formation of **esophageal varices**, which are dilated veins highly prone to rupture and bleeding [2]. - **Elevated liver enzymes** further support the diagnosis of underlying liver damage, making variceal bleeding the most likely cause of upper GI bleeding in this context [2]. *Peptic ulcer* - While **alcohol use** can contribute to peptic ulcer disease, the presence of **elevated liver enzymes** points more strongly to liver pathology as the primary cause of bleeding. - Peptic ulcers typically cause bleeding from superficial erosions or deep ulcers in the stomach or duodenum, rather than directly resulting from portal hypertension. *Gastric cancer* - Although **chronic alcohol use** is a minor risk factor for gastric cancer, it is less common to present primarily with massive upper GI bleeding and elevated liver enzymes. - Gastric cancer bleeding is usually insidious and can be associated with weight loss and other constitutional symptoms, which are not mentioned. *Mallory-Weiss tear* - A **Mallory-Weiss tear** is a longitudinal mucosal tear in the esophagus, often caused by forceful retching or vomiting, sometimes associated with alcohol intoxication. - While upper GI bleeding can occur [1], it's less likely to be the primary cause in someone with chronic alcohol abuse and elevated liver enzymes, which strongly suggest underlying liver disease as the source.

Question 1105: A 50-year-old male with a history of alcohol abuse presents with epigastric pain radiating to the back. A CT scan of the abdomen shows a pseudocyst in the pancreas. What is the most appropriate management?

A. Observation
B. Percutaneous drainage
C. Surgical drainage
D. Endoscopic drainage (Correct Answer)

Explanation: ***Endoscopic drainage*** - This is the most appropriate management for a symptomatic pancreatic pseudocyst that has failed conservative management, as it is less invasive than surgical options. - **Endoscopic ultrasound (EUS)-guided drainage** allows for safe and effective internal drainage of the pseudocyst into the GI tract, minimizing risks associated with external drainage. *Observation* - This is typically appropriate for **asymptomatic pseudocysts** that are small (<6 cm) and detected incidentally [1]. - Given the patient's **epigastric pain radiating to the back**, the pseudocyst is likely symptomatic and requires intervention [1]. *Percutaneous drainage* - This method involves placing a catheter through the skin into the pseudocyst to drain its contents. - While it can provide temporary relief, **it carries a higher risk of infection** and creation of a pancreatic fistula compared to internal drainage [1]. *Surgical drainage* - This option, often referred to as a **cystogastrostomy** or **cystojejunostomy**, is more invasive and is typically reserved for cases where endoscopic drainage has failed or is not feasible. - It involves a larger surgical procedure with associated risks like **longer recovery time** and increased morbidity.

Question 1106: A 12-year-old girl presents with chronic diarrhea, abdominal pain, and weight loss. Laboratory tests reveal anemia and elevated inflammatory markers. What is the most likely diagnosis?

A. Irritable bowel syndrome
B. Celiac disease
C. Crohn's disease (Correct Answer)
D. Lactose intolerance

Explanation: ***Crohn's disease*** - **Chronic diarrhea**, **abdominal pain**, and **weight loss** in a 12-year-old, coupled with **anemia** and **elevated inflammatory markers**, are highly suggestive of **inflammatory bowel disease (IBD)**, with Crohn's disease being a strong possibility. - Crohn's disease can affect any part of the gastrointestinal tract, leading to transmural inflammation and malabsorption which often results in **anemia** and **weight loss**. *Irritable bowel syndrome* - While it causes **abdominal pain** and **changes in bowel habits**, it typically does not present with **weight loss**, **anemia**, or **elevated inflammatory markers**. - It is a **functional disorder** and does not cause the structural changes seen in IBD. *Celiac disease* - Also presents with **chronic diarrhea**, **abdominal pain**, **weight loss**, and **anemia** due to malabsorption. - The key differentiator is the response to a **gluten-free diet** and specific serological markers (e.g., anti-tissue transglutaminase). *Lactose intolerance* - Causes **diarrhea**, **bloating**, and **abdominal pain** after consuming dairy products. - It does not lead to **weight loss**, **anemia**, or **elevated inflammatory markers** as seen in this clinical picture.

Question 1107: Which is the most appropriate first-line treatment for a young adult experiencing their first episode of moderate to severe ulcerative colitis?

A. Immunomodulators
B. Antibiotics
C. 5-ASA compounds
D. Corticosteroids (Correct Answer)

Explanation: ***Corticosteroids*** - For **moderate to severe ulcerative colitis**, corticosteroids are recommended as the **first-line treatment** due to their rapid anti-inflammatory effects [1]. - They induce remission by suppressing the immune response and reducing inflammation, but are generally not used for long-term maintenance due to significant side effects [1]. *5-ASA compounds* - **5-aminosalicylic acid (5-ASA) compounds** are typically used for **mild to moderate ulcerative colitis** or as maintenance therapy to prevent relapse [1]. - They are generally insufficient for inducing remission in cases of moderate to severe disease activity [1]. *Immunomodulators* - **Immunomodulators** like azathioprine or methotrexate are used for **long-term maintenance** therapy to prevent relapse and reduce corticosteroid dependence, not for acute induction of remission [1]. - Their onset of action is slow, making them unsuitable for first-line treatment of an acute, severe flare. *Antibiotics* - **Antibiotics** are typically used in ulcerative colitis if there is a concern for a **secondary bacterial infection** (e.g., *Clostridium difficile*), or as part of a regimen for pouchitis after colectomy. - They do not directly address the underlying inflammatory process of uncomplicated ulcerative colitis.

Question 1108: A 28-year-old woman presents with chronic diarrhea, weight loss, and anemia. Endoscopy reveals villous atrophy. What is the most likely diagnosis?

A. Irritable bowel syndrome
B. Crohn's disease
C. Celiac disease (Correct Answer)
D. Ulcerative colitis

Explanation: ***Celiac disease*** - The combination of **chronic diarrhea**, **weight loss**, and **anemia** is highly suggestive of malabsorption, and **villous atrophy** on endoscopy is the classic pathological finding in celiac disease [1]. - Celiac disease is an **autoimmune disorder** triggered by gluten ingestion, leading to damage to the small intestinal lining [1]. *Irritable bowel syndrome* - While it can cause chronic diarrhea, IBS typically does not lead to **weight loss**, **anemia**, or **villous atrophy**. - IBS is a **functional gastrointestinal disorder** characterized by abdominal pain and altered bowel habits without structural abnormalities. *Crohn's disease* - Crohn's disease can cause chronic diarrhea, weight loss, and anemia due to inflammation throughout the GI tract, but it is characterized by **transmural inflammation** and skip lesions, not primarily villous atrophy. - Endoscopic findings in Crohn's typically include **ulcers**, strictures, and cobblestoning. *Ulcerative colitis* - This condition primarily affects the **colon** and rectum, causing inflammation that is continuous and superficial, leading to bloody diarrhea. - Ulcerative colitis does not cause **villous atrophy** in the small intestine since it is generally restricted to the large intestine.

Question 1109: A 45-year-old man with chronic liver disease presents with fatigue, jaundice, and confusion. His laboratory tests show elevated ammonia levels. What is the primary physiological cause of his confusion?

A. Hyperglycemia
B. Hypoalbuminemia
C. Hyperammonemia (Correct Answer)
D. Hyperbilirubinemia

Explanation: ### Hyperammonemia - The combination of **chronic liver disease**, **fatigue**, **jaundice**, and **confusion** with **elevated ammonia levels** is highly indicative of hepatic encephalopathy, where hyperammonemia is the primary neurotoxin [1]. - Ammonia crosses the **blood-brain barrier** and disrupts astrocyte function, leading to cerebral edema and impaired neurotransmission, resulting in confusion and other neurological symptoms [1]. ### Hyperglycemia - While hyperglycemia can cause confusion in certain conditions (e.g., severe diabetic ketoacidosis or hyperosmolar hyperglycemic state), it is not the **primary physiological cause** of confusion in the context of chronic liver disease with elevated ammonia. [3] - There is no mention of extremely high blood glucose levels or other diabetic complications to suggest hyperglycemia as the leading cause here. ### Hypoalbuminemia - **Hypoalbuminemia** is common in chronic liver disease due to impaired synthetic function but is not a direct cause of confusion. [3] - While it can lead to problems like **edema** and impaired drug binding, it does not directly impair brain function to cause confusion as ammonia does. [3] ### Hyperbilirubinemia - **Hyperbilirubinemia** causes jaundice (which is present in the patient) and can be neurotoxic in severe cases in neonates (kernicterus), but it is not the primary cause of confusion in adults with chronic liver disease unless levels are extremely high and associated with other severe complications. [2] - The elevated ammonia level provides a more direct and potent explanation for the neurological symptoms.

Question 1110: A 60-year-old female presents with disorientation, visual hallucinations, and fluctuating levels of consciousness. She has a history of chronic liver disease. What is the most likely diagnosis?

A. Chronic psychotic disorder
B. Severe depression with psychotic features
C. Acute confusional state
D. Hepatic encephalopathy (Correct Answer)

Explanation: **Hepatic encephalopathy** - **Hepatic encephalopathy** is strongly suggested by the patient's history of **chronic liver disease** combined with **disorientation**, **fluctuating levels of consciousness**, and **visual hallucinations** [1]. - These neurological and psychiatric symptoms occur due to the accumulation of **toxins** (like ammonia) in the bloodstream that the diseased liver cannot adequately metabolize, affecting brain function [1]. *Chronic psychotic disorder* - This condition typically presents with a more **gradual onset** of psychotic symptoms and is not directly linked to acute fluctuations in consciousness or a specific medical condition like liver failure. - While visual hallucinations can occur, the **fluctuating consciousness** and immediate link to chronic liver disease make this diagnosis less likely. *Severe depression with psychotic features* - This diagnosis usually involves **prominent mood disturbances** like profound sadness, anhedonia, and vegetative symptoms, along with delusions or hallucinations. - The primary presentation here is one of **cognitive impairment** and **fluctuating consciousness**, which is not typical for primary depression. *Acute confusional state* - While hepatic encephalopathy is a cause of an "acute confusional state" (also known as delirium), this option is too general and less specific given the clear underlying etiology. - Delirium is a syndrome, not a specific disease, and pinpointing the cause (hepatic encephalopathy) is more accurate.

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

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