Gastroenterology Practice Questions

Q: Serum amylase is not raised in

Ruptured ovarian cyst. Ruptured ovarian cyst - A ruptured ovarian cyst involves the *gonads* and does not typically result in the release of **amylase** into the bloodstream. - While it can cause *acute abdominal pain*, it does not directly affect organs that produce significant amounts of amylase, such as the *pancreas* or *salivary glands*. Cholecystitis - **Cholecystitis** can cause *mild elevations* in serum amylase, particularly if there is associated *pancreatic inflammation* [1] or *gallstone pancreatitis* [2]. - Obstruction of the bile duct can lead to reflex pancreatic exocrine dysfunction and increased amylase. Peptic ulcer perforation - A **perforated peptic ulcer** can lead to the release of *gastric or duodenal contents* into the *peritoneal cavity*, causing **chemical peritonitis** [1]. - This irritation can sometimes trigger a *sympathetic response* leading to mild, transient increases in serum amylase or *pancreatic inflammation*. Intestinal ischemia - **Intestinal ischemia** can cause *cellular damage* and *inflammatory responses* within the bowel wall. - In severe cases, this can lead to the release of various enzymes, including *amylase*, from the damaged intestinal tissue or through a *secondary inflammatory effect* on the pancreas.

Q: Which of the following statements about Wilson's disease is true?

Low serum ceruloplasmin and high urinary copper. ***Low serum ceruloplasmin and high urinary copper*** - In **Wilson's disease**, there is a defect in **copper transport**, leading to impaired incorporation of copper into ceruloplasmin and reduced biliary excretion. - This results in **low serum ceruloplasmin** levels (since ceruloplasmin is the main copper-carrying protein in the blood) and **increased urinary copper excretion** as the body attempts to eliminate excess free copper. *Low serum ceruloplasmin and low urinary copper* - While **low serum ceruloplasmin** is characteristic, **low urinary copper** would indicate adequate copper elimination or a different condition, which is not the case for Wilson's disease. - Patients with Wilson's disease have **excess copper accumulation**, and increased urinary excretion is a compensatory mechanism [1]. *High serum ceruloplasmin and low urinary copper* - **High serum ceruloplasmin** is inconsistent with Wilson's disease, as ceruloplasmin levels are typically low due to the impaired copper binding. - **Low urinary copper** excretion would indicate normal or low total body copper, which contradicts the copper overload seen in Wilson's disease. *High serum ceruloplasmin and high urinary copper* - **High serum ceruloplasmin** would suggest normal or increased ceruloplasmin synthesis or release, which is contrary to the pathophysiology of Wilson's disease. - Although **high urinary copper** is a feature, it isn't accompanied by high ceruloplasmin in this condition, as ceruloplasmin is primarily involved in carrying copper in the blood rather than excreting excess copper [1].

Q: A 40-year-old patient presents with chronic abdominal pain and diarrhea, passing 22-25 stools per day, accompanied by weight loss. On examination, she has mild fever and right lower quadrant tenderness. A lower GI endoscopy reveals the following histopathological findings. An intern in the medicine ward generates a list of differential diagnoses for this patient. Which of the following options is most likely the diagnosis?

Crohn's disease. **Crohn's disease** - The image shows **non-caseating granulomas**, which are a characteristic histopathological finding in Crohn's disease, distinguishing it from other inflammatory bowel conditions. - The clinical presentation of chronic abdominal pain, diarrhea, weight loss, and **right lower quadrant tenderness** further supports Crohn's disease, as it commonly affects the ileum and colon in a "skip lesion" pattern. *Ulcerative colitis* - Ulcerative colitis affects only the **mucosa and submucosa** and **does not typically present with granulomas**. - While it causes chronic diarrhea and abdominal pain, it usually affects the **rectum and colon continuously**, and granulomas are absent. *Mesenteric ischemia* - Mesenteric ischemia is characterized by **ischemic necrosis** of the bowel wall due to reduced blood flow, not granulomatous inflammation. - While it can cause abdominal pain and diarrhea, the histopathology would show **infarction and inflammation secondary to ischemia**, not granulomas. *Infective enteritis* - Infective enteritis is typically an **acute condition** and while it can cause diarrhea and abdominal pain, it is not usually chronic and associated with granulomas unless it is a specific infection like tuberculosis. - The histopathological findings in most infective enteritis cases show **acute inflammation** and possibly mucosal damage, but not typically non-caseating granulomas.

Q: Multiple intrahepatic bile duct dilations with bile lakes and concurrent sepsis are suggestive of.

Caroli disease. ***Caroli disease*** - **Caroli disease** is characterized by **congenital dilation** of the large intrahepatic bile ducts, leading to bile stasis, stone formation, and recurrent bouts of cholangitis and sepsis [1]. - The presence of **multiple intrahepatic bile duct dilations** and **bile lakes** with concurrent **sepsis** is highly indicative of this condition [1]. *Watson-Algali syndrome* - This is an incorrect term; there is no recognized medical condition by this name associated with bile duct anomalies. - The symptoms described do not correspond to any known genetic or acquired liver disease under this designation. *Primary sclerosing cholangitis* - **Primary sclerosing cholangitis (PSC)** involves **fibrosing inflammation** of both intrahepatic and extrahepatic bile ducts, leading to strictures and dilations, but typically progresses to **cirrhosis** and does not primarily manifest with large "bile lakes" [1]. - While PSC can cause recurrent cholangitis and present with bile duct irregularities, the specific description of "bile lakes" and diffuse dilations better fits Caroli disease [1]. *Klatskin tumor* - A **Klatskin tumor** is a **cholangiocarcinoma** located at the bifurcation of the common hepatic duct, causing **proximal bile duct obstruction** and dilation. - While it can lead to cholangitis and sepsis due to obstruction, it is a localized neoplastic mass, not a congenital diffuse dilation with "bile lakes" throughout the intrahepatic system.

Q: Toxic megacolon is most commonly associated with what?

Ulcerative colitis. ***Ulcerative colitis*** - Toxic megacolon is most commonly associated with **ulcerative colitis** [1], a condition causing severe colon inflammation and ulceration. - The risk of toxic megacolon increases with **colitis flares** and extends the colon's diameter significantly. *Reiter's disease* - Also known as **reactive arthritis**, it primarily affects the joints and has **no direct link** to toxic megacolon. - Symptoms include joint pain, urethritis, and conjunctivitis, unrelated to intestinal dilation. *Whipple's disease* - A rare bacterial infection affecting the gastrointestinal tract, but it does not commonly lead to **toxic megacolon**. - Primarily presents with **malabsorption**, weight loss, and other systemic symptoms rather than intestinal dilation. *Crohn's disease* - While it can lead to colon issues, toxic megacolon is **more characteristic of ulcerative colitis** rather than Crohn's. - Crohn's disease may cause **stenosis and fistulas**, not typically contributing to toxic megacolon [2].

Q: Which of the following is a prognostic factor in acute liver failure?

Prothrombin time (PT). - **Prothrombin time (PT)** is a crucial prognostic factor in acute liver failure because the liver synthesizes **coagulation factors**, and severe liver dysfunction impairs this synthesis [1]. - A **prolonged PT** indicates reduced synthetic function of the liver, reflecting the severity of hepatic damage and poorer prognosis [1], [2]. *Alpha-fetoprotein (AFP)* - **Alpha-fetoprotein (AFP)** is primarily a tumor marker for **hepatocellular carcinoma** and germ cell tumors. - While it can be elevated in some liver diseases, it is not a direct or reliable prognostic marker for acute liver failure. *Serum albumin level* - **Serum albumin** is a measure of the liver's synthetic function, but its half-life is approximately **3 weeks**. - This makes it a better indicator of **chronic liver disease** rather than the rapid changes seen in acute liver failure. *Serum globulin level* - **Serum globulin levels** reflect a mixture of proteins, including immunoglobulins, and are not specific markers of acute liver failure severity. - Elevated globulins are often associated with **chronic inflammation** or certain autoimmune conditions.

Q: A 55-year-old woman presents with progressively deepening jaundice, uncontrollable pruritus, pain in the abdomen (right upper quadrant), and yellow-coloured urine. Investigations reveal that the patient has a mass in the head of the pancreas on imaging studies. What is the most likely diagnosis?

Obstructive jaundice due to carcinoma of the pancreas. ***Obstructive jaundice due to carcinoma of the pancreas*** - The constellation of **progressively deepening jaundice**, **uncontrollable pruritus**, and **yellow urine** (indicating conjugated hyperbilirubinemia) points to **obstructive jaundice** [1]. - The presence of a **mass in the head of the pancreas** on imaging directly explains the obstruction of the common bile duct, which is a classic presentation of **pancreatic head carcinoma**. *Acute hepatitis with jaundice* - **Acute hepatitis** typically presents with fatigue, nausea, and jaundice, but the jaundice is usually **not rapidly progressive** or accompanied by significant **pruritus** due to obstruction. Jaundice due to parenchymal liver disease is characteristically associated with significant increases in transaminases [2]. - Imaging would reveal **liver inflammation** rather than a pancreatic mass. *Advanced liver cancer with jaundice* - While **liver cancer** can cause jaundice, it's usually due to direct **liver cell damage** or widespread infiltration, leading to unconjugated or mixed hyperbilirubinemia [2]. - The most striking feature here is the **pancreatic mass** causing obstruction, not primarily liver parenchymal disease. *Chronic liver disease with jaundice* - **Chronic liver disease** (e.g., cirrhosis) can cause jaundice, but it's typically prolonged and associated with other signs of liver failure like **ascites**, **encephalopathy**, and **variceal bleeding**. - The prominent **obstructive symptoms** and the finding of a **pancreatic mass** are not characteristic of chronic liver disease as the primary cause of jaundice.

Q: Dieulafoy's lesion is seen in what?

Stomach. ***Stomach*** - **Dieulafoy's lesion** is a rare cause of recurrent, massive gastrointestinal bleeding, most commonly found in the **stomach**, particularly along the lesser curvature within 6 cm of the gastroesophageal junction. - It is characterized by an abnormally large, tortuous arteriole that erodes through the mucosa, without an associated ulcer or aneurysm, leading to profuse arterial bleeding. *Jejunum* - While gastrointestinal bleeding can occur in the jejunum from various causes, **Dieulafoy's lesion** is exceedingly rare in the small bowel. - Causes of jejunal bleeding are more commonly related to disorders like **Meckel's diverticulum**, vascular malformations, or tumors. *Oesophagus* - The esophagus is a less common site for Dieulafoy's lesions, though rare cases have been reported. - **Esophageal bleeding** is more often associated with **esophageal varices** in patients with portal hypertension or **Mallory-Weiss tears**. *Anus* - Dieulafoy's lesion has been reported in the rectum and other parts of the colon, but it is extremely uncommon in the anus itself. - **Anal bleeding** is typically due to common conditions like **hemorrhoids**, **anal fissures**, or perianal abscesses.

Q: A 48-year-old male presents with a 6-month history of constant abdominal pain, particularly after meals, located in the upper mid-abdomen superior to the umbilicus. He also reports some heartburn that occurred during the previous year. Under significant stress, he has been self-medicating with over-the-counter antacids, with some relief. He notes that his stools have changed in colour over the previous 2 months and are now intermittently dark and tarry in consistency. Following stool testing, which organ is most likely to be affected?

Stomach. ***Stomach*** - The patient's symptoms, including **constant epigastric pain after meals**, heartburn, and **dark, tarry stools (melena)**, are highly suggestive of an **upper gastrointestinal bleed**, most commonly due to a **peptic ulcer** in the stomach or duodenum [1]. - While antacids provide some relief for heartburn, they do not address the underlying cause of a bleeding ulcer, and **melena** indicates significant blood loss from the upper GI tract [1]. *Liver* - Liver conditions, such as **cirrhosis or hepatitis**, might cause abdominal pain or dark stools if there's significant bleeding from **esophageal varices**, but the primary location of pain (upper mid-abdomen superior to the umbilicus) and **heartburn** point away from the liver as the primary affected organ. - Liver disease would typically present with other symptoms like **jaundice, ascites**, or abnormal liver function tests, which are not mentioned. *Pancreas* - Pancreatic conditions, such as **pancreatitis or pancreatic cancer**, typically cause **severe epigastric pain** that often radiates to the back and is not usually relieved by antacids. - While pancreatic issues can lead to complications affecting digestion, they don't typically manifest with **dark, tarry stools** as a primary symptom unless there's an unusual complication like a fistula causing GI bleeding. *None of the options* - Given the classic presentation of **epigastric pain, heartburn**, and **melena**, one of the provided organs (stomach) is very likely to be affected by the patient's condition [1]. - The symptom cluster strongly points to an issue within the upper gastrointestinal tract, specifically involving acid-related damage and bleeding.

Q: D-xylose absorption test is used to assess which of the following conditions?

Celiac disease. Celiac disease - The **D-xylose absorption test** assesses the functional integrity of the **small intestinal mucosa**, which is damaged in celiac disease. [1] - In celiac disease, the damaged villi impair the absorption of D-xylose, leading to **low urinary excretion** of the sugar. *Colon cancer* - Colon cancer primarily affects the **large intestine** and does not typically interfere with small intestinal D-xylose absorption. [2] - Diagnosis commonly involves **colonoscopy** and biopsy, not absorption tests. *PUD* - **Peptic ulcer disease (PUD)** affects the stomach or duodenum and does not impair the absorptive function of the small intestine. [3] - The primary diagnostic tool for PUD is **endoscopy** with biopsy for H. pylori. *Ulcerative colitis* - **Ulcerative colitis** is an inflammatory condition predominantly affecting the **large intestine** and rectum. [2] - It does not cause malabsorption in the small intestine, and therefore, D-xylose absorption would typically be normal.

Question 1

Serum amylase is not raised in

Accepted Answer

Ruptured ovarian cyst

Answer

Peptic ulcer perforation

Answer

Intestinal ischemia

Answer

Cholecystitis

Question 2

Which of the following statements about Wilson's disease is true?

Accepted Answer

Low serum ceruloplasmin and high urinary copper

Answer

Low serum ceruloplasmin and low urinary copper

Answer

High serum ceruloplasmin and low urinary copper

Answer

High serum ceruloplasmin and high urinary copper

Question 3

A 40-year-old patient presents with chronic abdominal pain and diarrhea, passing 22-25 stools per day, accompanied by weight loss. On examination, she has mild fever and right lower quadrant tenderness. A lower GI endoscopy reveals the following histopathological findings. An intern in the medicine ward generates a list of differential diagnoses for this patient. Which of the following options is most likely the diagnosis?

Accepted Answer

Crohn's disease

Answer

Ulcerative colitis

Answer

Mesenteric ischemia

Answer

Infective enteritis

Question 4

Multiple intrahepatic bile duct dilations with bile lakes and concurrent sepsis are suggestive of.

Accepted Answer

Caroli disease

Answer

Watson-Algali syndrome

Answer

Primary sclerosing cholangitis

Answer

Klatskin tumor

Question 5

Toxic megacolon is most commonly associated with what?

Accepted Answer

Ulcerative colitis

Answer

Crohn's disease

Answer

Whipple's disease

Answer

Reiter's disease

Question 6

Which of the following is a prognostic factor in acute liver failure?

Accepted Answer

Prothrombin time (PT)

Answer

Alpha-fetoprotein (AFP)

Answer

Serum albumin level

Answer

Serum globulin level

Question 7

A 55-year-old woman presents with progressively deepening jaundice, uncontrollable pruritus, pain in the abdomen (right upper quadrant), and yellow-coloured urine. Investigations reveal that the patient has a mass in the head of the pancreas on imaging studies. What is the most likely diagnosis?

Accepted Answer

Obstructive jaundice due to carcinoma of the pancreas

Answer

Advanced liver cancer with jaundice

Answer

Acute hepatitis with jaundice

Answer

Chronic liver disease with jaundice

Question 8

Dieulafoy's lesion is seen in what?

Accepted Answer

Stomach

Answer

Jejunum

Answer

Oesophagus

Answer

Anus

Question 9

A 48-year-old male presents with a 6-month history of constant abdominal pain, particularly after meals, located in the upper mid-abdomen superior to the umbilicus. He also reports some heartburn that occurred during the previous year. Under significant stress, he has been self-medicating with over-the-counter antacids, with some relief. He notes that his stools have changed in colour over the previous 2 months and are now intermittently dark and tarry in consistency. Following stool testing, which organ is most likely to be affected?

Accepted Answer

Stomach

Answer

Liver

Answer

Pancreas

Answer

None of the options

Question 10

D-xylose absorption test is used to assess which of the following conditions?

Accepted Answer

Celiac disease

Answer

Colon cancer

Answer

PUD

Answer

Ulcerative colitis

Gastroenterology — MCQs

Gastroenterology — MCQs

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