Gastroenterology Practice Questions

Q: All of the following are features of Zollinger Ellison syndrome except:

Beta cell tumours of the pancreas. ***Beta cell tumours of the pancreas*** - Zollinger-Ellison syndrome (ZES) is caused by **gastrinomas**, which are **neuroendocrine tumors** that typically arise from the **gastrin-producing G cells**, not the insulin-producing beta cells, of the pancreas or duodenum. - While pancreatic tumors are common in ZES, they are specifically **gastrinomas**, leading to excessive gastrin secretion. *Severe diarrhoea* - This is a common feature of ZES resulting from the **high acid output** reaching the small intestine. - The excessive acid inactivates pancreatic lipase, leading to **maldigestion** and stimulates fluid and electrolyte secretion, causing secretory diarrhea. *Very high acid output* - ZES is characterized by the **overproduction of gastrin**, which stimulates the parietal cells of the stomach to secrete large amounts of **hydrochloric acid**. - This leads to a significantly **increased basal and maximal acid output** in the stomach. *Intractable peptic ulcers* - The extremely high gastric acid secretion in ZES causes **multiple, recurrent, and often refractory peptic ulcers**, which can be located in atypical sites such as the jejunum. - These ulcers are typically difficult to treat with standard anti-ulcer medications due to the persistent gastric hypersecretion.

Q: Which of the following is true about Mallory-Weiss tear -

It is a mucosal tear not extending through the muscle layer. ***It is a mucosal tear not extending through the muscle layer*** - A **Mallory-Weiss tear** is defined as a longitudinal tear in the **mucosa** of the distal esophagus or proximal stomach. - These tears typically do not extend through the **muscularis propria** layer, distinguishing them from a Boerhaave syndrome, which is a full-thickness rupture. *It is more common in women than men* - Mallory-Weiss tears show a **male predominance** with a male-to-female ratio of approximately 2-4:1. - Risk factors like **alcohol use disorder** and forceful vomiting are more common in males, contributing to this gender distribution. *It is common in young individuals* - Mallory-Weiss tears are more common in **middle-aged to older individuals**, typically between 40 and 60 years old. - The condition is rare in young children or teenagers. *It is associated with achalasia cardia* - While both conditions affect the esophagus, there is **no direct causal association** between Mallory-Weiss tears and **achalasia cardia**. - Achalasia is a motility disorder, whereas Mallory-Weiss tears are caused by sudden increases in intra-abdominal pressure.

Q: If 90% of the jejunum and ileum is removed, which of the following features will NOT be seen?

Weight gain. ***Weight gain*** - Extensive **resection of the jejunum and ileum** (90% removal) significantly reduces the absorptive surface area of the small intestine [3]. - This severe malabsorption of nutrients, including fats and carbohydrates, would lead to **weight loss** due to calorie deficit, not weight gain [2]. *Steatorrhoea* - The ileum is crucial for the absorption of **bile acids**; its extensive removal leads to bile acid malabsorption [1]. - Reduced bile acid reabsorption impairs **fat emulsification and absorption**, resulting in increased fat in the stool and causing steatorrhoea [1]. *Diarrhoea* - Loss of significant length of the ileum and jejunum reduces the ability to absorb water and electrolytes, leading to increased luminal fluid [3]. - The unabsorbed bile acids reaching the colon also act as **secretagogues**, further contributing to osmotic and secretory diarrhea. *Megaloblastic anemia* - The terminal ileum is the primary site for the absorption of **vitamin B12** (cobalamin), which binds to intrinsic factor produced by the stomach. - Extensive ileal resection would severely impair vitamin B12 absorption, leading to a deficiency that manifests as **macrocytic, megaloblastic anemia** [2].

Q: Which of the following is NOT a common complication of acute pancreatitis?

Hypercalcemia. ***Hypercalcemia*** - Acute pancreatitis is primarily associated with **increased amylase levels** and **hyperlipidemia**, while hypercalcemia is generally a separate condition. - It is not a classical complication or result of acute pancreatitis, but rather might be a cause in cases like **hyperparathyroidism** [1]. *Subcutaneous fat necrosis* - This occurs as a result of **lipolysis** during acute pancreatitis due to the release of **lipases** into circulation [1]. - It is characterized by the presence of **fat necrosis** on the abdomen or buttocks. *Increased amylase level* - A hallmark of acute pancreatitis is **elevated levels of amylase** and sometimes lipase, indicating pancreatic inflammation [1]. - The rise typically occurs within the first 24 hours of the onset of pancreatitis. *Hyperlipidemia* - This is often found in acute pancreatitis due to excess **lipolysis**, leading to elevated triglycerides in the blood [1]. - It can be both a cause and a consequence of pancreatic inflammation, contributing to the disease process [1].

Q: A patient presents with difficulty with swallowing liquids but not solids. The best investigation to make a diagnosis is

Manometry. ***Manometry*** - **Esophageal manometry** measures the pressure and coordination of muscle contractions in the esophagus, which is crucial for diagnosing motility disorders like **achalasia** [1] or **esophageal spasm** [2] that can cause difficulty swallowing liquids. - The symptom of difficulty swallowing liquids but not solids (**paradoxical dysphagia**) is characteristic of a primary esophageal motility disorder rather than a structural obstruction [1]. *Endoscopy* - **Endoscopy** is primarily used to visualize the esophagus and stomach for structural abnormalities such as **strictures**, **tumors**, or **inflammation** [1]. - While it can rule out structural causes, it is less effective for diagnosing purely functional or motility disorders [1]. *Endoscopic ultrasound* - **Endoscopic ultrasound (EUS)** provides detailed imaging of the esophageal wall and surrounding structures, helping to stage cancers or identify extrinsic compression. - It is not the primary investigation for assessing **esophageal motility**. *PET CT* - **PET CT** is primarily used in oncology for **cancer staging**, recurrence detection, and assessing metabolic activity of lesions. - It has limited utility in the initial diagnosis of a **swallowing disorder**, especially one indicating a motility issue.

Q: What is the main contraindication for performing a liver biopsy?

Severe coagulopathy. ***Severe coagulopathy*** - **Severe coagulopathy** is the main contraindication for liver biopsy due to a significantly increased risk of **hemorrhage** [1]. - A **prothrombin time (PT)** or **activated partial thromboplastin time (aPTT)** significantly prolonged beyond the normal range, or an **INR > 1.5**, should be corrected before the procedure [1]. *Severe thrombocytopenia* - While **thrombocytopenia** (platelet count <50,000/µL) does increase bleeding risk, it is often correctable with a **platelet transfusion** prior to biopsy, making it a relative rather than an absolute contraindication [1]. - The risk of major bleeding is typically lower with isolated thrombocytopenia compared to severe coagulopathy. *Liver hemangioma* - The presence of a **liver hemangioma** at the biopsy site is a contraindication as biopsying it can lead to massive hemorrhage. - However, if the biopsy can be performed safely away from the hemangioma, it is not an absolute contraindication to the procedure itself. *Presence of ascites* - **Ascites** can complicate a liver biopsy by increasing the risk of **peritoneal bleeding** and difficulty in targeting the liver [1]. - However, it is often manageable by draining the ascites or using imaging guidance, making it a relative contraindication rather than an absolute one [1].

Q: What is the primary clinical application of the Rockall score?

Upper GI bleeding. ***Upper GI bleeding*** - The **Rockall score** is a clinical risk assessment tool specifically designed to predict **re-bleeding** and **mortality** in patients admitted with **acute upper gastrointestinal bleeding** [1]. - It uses clinical parameters (age, shock, comorbidities) and endoscopic findings (diagnosis, stigmata of recent hemorrhage) to stratify risk [1]. *Lower GI bleeding* - The Rockall score is **not validated** for assessing risk in **lower gastrointestinal bleeding**, which has different etiologies and clinical courses. - Other scoring systems, like the **Blatchford score** or **Glasgow-Blatchford score**, might be used for initial risk assessment in GI bleeding, but Rockall is specific to upper GI [1]. *Hepatic encephalopathy* - **Hepatic encephalopathy** is a neuropsychiatric complication of liver cirrhosis, for which the Rockall score has **no diagnostic or prognostic utility**. - Its assessment involves grading the severity of neurological symptoms and identifying precipitating factors. *IBD* - Inflammatory bowel disease (IBD), including Crohn's disease and ulcerative colitis, is a chronic inflammatory condition of the GI tract. - The Rockall score is **irrelevant** in the assessment or management of **IBD**, which uses specific disease activity indices.

Q: Hepatic Encephalopathy is predisposed by all, Except:

Hyperkalemia. ***Hyperkalemia*** - **Hyperkalemia** is not a known trigger for hepatic encephalopathy; in fact, **hypokalemia** is a more common electrolyte disturbance that can precipitate it due to its effect on renal ammonia excretion. - Electrolyte imbalances that contribute to hepatic encephalopathy usually involve **hypokalemia**, **hyponatremia**, or **alkalosis**, which affect **ammonia metabolism** and neuronal excitability [1]. *Dehydration* - **Dehydration** can lead to **reduced renal perfusion**, impairing the kidneys' ability to clear **ammonia** and other toxins, thus increasing their concentration in the blood. - It also contributes to **hemoconcentration**, elevating blood **ammonia levels** and increasing the risk of hepatic encephalopathy [1]. *Constipation* - **Constipation** allows for a longer transit time of stool in the colon, providing more opportunity for **intestinal bacteria** to produce **ammonia** from protein breakdown [1]. - The increased production and absorption of ammonia from the gut contribute significantly to the **nitrogenous load** in the bloodstream, predisposing to hepatic encephalopathy [1]. *GI Bleeding* - **Gastrointestinal bleeding** (GI bleeding) introduces a large protein load (blood) into the GI tract, which is then broken down by bacterial action. - This breakdown generates a significant amount of **ammonia** and other nitrogenous compounds, which are then absorbed into the bloodstream, overwhelming the impaired liver's ability to detoxify them and precipitating hepatic encephalopathy [1].

Q: Which of the following statements about alcoholic hepatitis is false?

SGPT is raised > SGOT. ***SGPT is raised > SGOT*** - In **alcoholic hepatitis**, the ratio of **AST (SGOT)** to **ALT (SGPT)** is typically **2:1 or higher**, meaning SGOT is usually significantly higher than SGPT. - This is because alcohol depletes **pyridoxal phosphate**, a cofactor for ALT, leading to relatively lower ALT levels. *Gamma glutamyl transferase is raised* - **Gamma-glutamyl transferase (GGT)** is frequently elevated in **alcoholic liver disease**, including alcoholic hepatitis [1]. - It serves as a sensitive marker for **biliary tract injury** and **alcohol consumption** [1]. *SGOT is raised > SGPT* - This statement is **true** for alcoholic hepatitis, as the **AST (SGOT)** to **ALT (SGPT)** ratio is typically **2:1 or greater**. - The disproportionately high AST is a characteristic feature reflecting the **mitochondrial damage** caused by alcohol within hepatocytes [2]. *Alkaline phosphatase is raised* - **Alkaline phosphatase (ALP)** can be elevated in alcoholic hepatitis, although usually to a lesser extent than in obstructive jaundice [1]. - Its elevation often reflects superimposed **cholestasis** or **biliary inflammation** [1].

Q: Which of the following is not a characteristic of Zieve syndrome?

Chronic pancreatitis. ***Chronic pancreatitis*** - **Zieve syndrome** is an acute, not chronic, condition, and its primary feature is not chronic pancreatic inflammation, though severe alcohol use can cause both. - While **alcohol abuse** is a risk factor for both Zieve syndrome and chronic pancreatitis, **chronic pancreatitis** itself is not considered a characteristic component of Zieve syndrome [1]. *Alcohol abuse* - **Alcohol abuse** is the underlying cause for the development of Zieve syndrome, leading to the characteristic triad of hemolytic anemia, hyperlipidemia, and jaundice. - It triggers the **liver damage** and metabolic disturbances that define the syndrome. *Hemolysis* - **Hemolysis** (destruction of red blood cells) is a key feature of Zieve syndrome, leading to **hemolytic anemia** and jaundice. - It results from increased red blood cell fragility and splenic sequestration exacerbated by altered lipid metabolism. *Hypertriglyceridemia* - **Hypertriglyceridemia** is a hallmark of Zieve syndrome, arising from impaired lipid metabolism secondary to alcohol-induced liver damage. - Elevated **triglyceride levels** contribute to red blood cell membrane abnormalities, thereby promoting hemolysis.

Question 1

All of the following are features of Zollinger Ellison syndrome except:

Accepted Answer

Beta cell tumours of the pancreas

Answer

Severe diarrhoea

Answer

Very high acid output

Answer

Intractable peptic ulcers

Question 2

Which of the following is true about Mallory-Weiss tear -

Accepted Answer

It is a mucosal tear not extending through the muscle layer

Answer

It is more common in women than men

Answer

It is common in young individuals

Answer

It is associated with achalasia cardia

Question 3

If 90% of the jejunum and ileum is removed, which of the following features will NOT be seen?

Accepted Answer

Weight gain

Answer

Steatorrhoea

Answer

Diarrhoea

Answer

Megaloblastic anemia

Question 4

Which of the following is NOT a common complication of acute pancreatitis?

Accepted Answer

Hypercalcemia

Answer

Subcutaneous fat necrosis

Answer

Hyperlipidemia

Answer

Increased amylase level

Question 5

A patient presents with difficulty with swallowing liquids but not solids. The best investigation to make a diagnosis is

Accepted Answer

Manometry

Answer

Endoscopy

Answer

Endoscopic ultrasound

Answer

PET CT

Question 6

What is the main contraindication for performing a liver biopsy?

Accepted Answer

Severe coagulopathy

Answer

Severe thrombocytopenia

Answer

Liver hemangioma

Answer

Presence of ascites

Question 7

What is the primary clinical application of the Rockall score?

Accepted Answer

Upper GI bleeding

Answer

Lower GI bleeding

Answer

Hepatic encephalopathy

Answer

IBD

Question 8

Hepatic Encephalopathy is predisposed by all, Except:

Accepted Answer

Hyperkalemia

Answer

Constipation

Answer

GI Bleeding

Answer

Dehydration

Question 9

Which of the following statements about alcoholic hepatitis is false?

Accepted Answer

SGPT is raised > SGOT

Answer

Gamma glutamyl transferase is raised

Answer

Alkaline phosphatase is raised

Answer

SGOT is raised > SGPT

Question 10

Which of the following is not a characteristic of Zieve syndrome?

Accepted Answer

Chronic pancreatitis

Answer

Alcohol abuse

Answer

Hemolysis

Answer

Hypertriglyceridemia

Gastroenterology — MCQs

Gastroenterology — MCQs

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