Gastroenterology Practice Questions

Q: MRP2 associated with which of the following?

Dubin-Johnson syndrome. No changes were made to the original explanation because the available references provided insufficient evidence to support the specific claims about the MRP2 gene and the characteristic 'dark liver' appearance of Dubin-Johnson syndrome. While the references discuss hyperbilirubinemia and mentions Gilbert and Crigler-Najjar syndromes [1], they do not explicitly detail the MRP2 mutation or the pathology of Dubin-Johnson and Rotor syndromes necessary for high-accuracy medical citation [2].

Q: A 35-year-old male presents with recurrent episodes of abdominal pain, jaundice, and fatigue and underwent MRCP. What will be the most likely diagnosis?

Primary sclerosing cholangitis. **Primary sclerosing cholangitis** - **MRCP (Magnetic Resonance Cholangiopancreatography)** in primary sclerosing cholangitis (PSC) typically shows characteristic **"beading"** and **strictures** of the biliary tree due to inflammation and fibrosis. - The combination of **recurrent abdominal pain**, **jaundice**, and **fatigue** in a relatively young male strongly suggests PSC, especially given its association with inflammatory bowel disease, which is common in this demographic [1]. *Primary biliary cirrhosis* - This condition primarily affects **small intrahepatic bile ducts** and is more common in **middle-aged women** [1]. - While it causes fatigue and jaundice, the classic MRCP findings of PSC (beading and strictures) are not typically seen, and it's associated with **anti-mitochondrial antibodies (AMA)** [1]. *Caroli’s disease* - This is a rare congenital disorder characterized by **segmental cystic dilatation of the intrahepatic bile ducts** [1]. - MRCP would show these **cystic dilations** rather than the diffuse strictures and beading seen in PSC. *Recurrent pyogenic cholangitis* - Also known as oriental cholangiohepatitis, it is characterized by recurrent episodes of **cholangitis** and **intrahepatic gallstones**, mostly seen in Asian populations. - While it presents with recurrent abdominal pain and jaundice, MRCP would show **intrahepatic calculi** and **dilated bile ducts**, not the stricturing pattern of PSC.

Q: Which of the following laboratory values is NOT a component of the MELD score?

Albumin. ***Albumin*** - **Albumin** is a component of the Child-Pugh score, which is also used to assess liver function, but it is **not included in the MELD score**. [2] - The MELD score specifically focuses on **renal function** (creatinine) and **liver synthesis/excretory function** (bilirubin and INR). [1] *Serum bilirubin* - **Serum bilirubin** is a key indicator of the liver's ability to excrete bile and is a **direct component** of the MELD score. [1], [2] - Higher bilirubin levels generally indicate **worse hepatocellular function** and are associated with a higher MELD score. *Serum creatinine* - **Serum creatinine** is a measure of **renal function** and is an important component of the MELD score. [1] - It reflects the severity of **hepatorenal syndrome** and the overall prognosis in patients with liver disease. [1] *International normalized ratio (INR)* - The **International Normalized Ratio (INR)** assesses the liver's synthetic function, specifically its ability to produce **clotting factors**. [2] - A higher INR indicates **impaired coagulation** due to liver dysfunction and is a direct component of the MELD score. [1]

Q: Which statement is true regarding Crohn's disease?

Crohn's disease typically presents with skip lesions.. ***Continuous lesion visualized in endoscopy*** - Crohn's disease typically presents with **discontinuous lesions**, also known as **skip lesions**, which are not found in continuous patterns [1]. - This statement fails to align with the characteristic **cobblestone mucosa** appearance of the disease seen during endoscopy. *Rectum is not involved* - While Crohn's disease primarily affects the **ileum** and **colon**, it can indeed involve the **rectum**, although it is more common in ulcerative colitis [1]. - Hence, rectal involvement is possible in Crohn's, opposing this statement. *Non caseating granulomas* - Crohn's disease is known for the presence of **non-caseating granulomas**, which are a pathological hallmark of the condition. - This statement incorrectly describes a feature that is, in fact, true for Crohn's. *Cobblestone appearance* - The characteristic **cobblestone appearance** is typical in Crohn's disease due to the patchy involvement of the intestinal mucosa. - This statement is also true, as it accurately describes a prominent finding in Crohn's disease.

Q: Common cause of chronic pancreatitis

Chronic alcohol. ***Chronic alcohol*** - **Chronic alcohol consumption** is the most common and well-established cause of chronic pancreatitis, accounting for a significant majority of cases [1]. - Alcohol induces premature activation of pancreatic enzymes within the acinar cells, leading to recurrent inflammation, fibrosis, and eventual pancreatic destruction [1]. *Chronic pancreatic calculi* - While **pancreatic calcifications** (calculi) are a common finding in chronic pancreatitis, they are typically a *consequence* of the disease process rather than its primary cause [1]. - These calculi often develop due to protein plug formation and subsequent calcification in the ducts, exacerbated by recurrent inflammation [1]. *pancreas divisum* - **Pancreas divisum** is a congenital anomaly where the dorsal and ventral pancreatic ducts fail to fuse, leading to the majority of pancreatic secretions draining through a smaller accessory papilla. - While it can be a rare cause of recurrent acute pancreatitis or, less commonly, chronic pancreatitis, it is far less frequent than chronic alcohol abuse. *Gall bladder stones* - **Gallbladder stones (cholelithiasis)** are a common cause of *acute pancreatitis* when they obstruct the common bile duct or pancreatic duct. - They are generally not a direct cause of *chronic* pancreatitis unless recurrent acute episodes lead to irreversible pancreatic damage, making alcohol the leading primary cause [1].

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: A 45 year old lawyer presents with pain in the abdomen more so in the epigastric region that worsens with eating spicy food and is relieved by bending forward. Complications of the above mentioned condition could be all except:

Splenic Vein Thrombosis. ***Splenic Vein Thrombosis*** - The patient's symptoms (epigastric pain worsening with spicy food, relieved by bending forward) are highly suggestive of **pancreatitis**, not peptic ulcer disease [1]. **Splenic vein thrombosis** is a known complication of chronic pancreatitis due to inflammation and compression of the splenic vein [2]. - While pancreatitis can cause significant morbidity, **splenic vein thrombosis** is a specific vascular complication associated with prolonged inflammation of the pancreas, leading to localized portal hypertension and potentially isolated gastric varices. *Perforation* - **Perforation** (specifically of a peptic ulcer or potentially surrounding bowel in severe pancreatitis) is a severe complication that can occur in conditions causing abdominal pain, but it is not the *exception* among the given options for the likely underlying condition indicated by the patient's symptoms (pancreatitis) [3]. - This complication typically leads to **peritonitis**, a medical emergency requiring immediate surgical intervention [3]. *Bleeding* - **Bleeding** (e.g., from a pancreatic pseudocyst rupturing into the gastrointestinal tract or from localized varices secondary to portal hypertension in pancreatitis) is a recognized complication of the patient's likely underlying condition [1]. - Gastrointestinal bleeding can also result from **gastric erosions** or ulcers exacerbated by ongoing inflammation. *Gastric Outlet Obstruction* - **Gastric outlet obstruction** can occur as a complication of severe or chronic pancreatitis, often due to **inflammation**, **fibrosis**, or **pseudocyst formation** compressing the duodenum [1]. - This typically presents with **postprandial vomiting** and early satiety, which can arise in the context of chronic pancreatic inflammation.

Q: All of the following may lead to gall bladder carcinoma except which of the following?

Echinococcus Granulosus Infection. ***Echinococcus Granulosus Infection*** - Echinococcus granulosus is primarily associated with **hydatid cyst formation**, not directly linked to gallbladder carcinoma. - This infection typically affects the **liver** rather than inducing malignant transformation in the gallbladder. *Typhoid carriers* - Chronic infection with **Salmonella typhi** in carriers can cause **gallbladder inflammation** and is a risk factor for gallbladder cancer. - Typhoid carriers retain the bacteria in the gallbladder, leading to chronic irritation and potentially malignant changes. *Gall Bladder Polyps* - Certain types of gallbladder polyps, especially those larger than **1 cm**, have a significant risk of undergoing malignant transformation. - They are associated with **chronic inflammation** and may progress to cancer if not monitored. *Exposure to carcinogens like nitrosamine* - Nitrosamines are known **carcinogens** that can induce protein modifications leading to DNA damage, contributing to gallbladder cancer. - Long-term exposure to such chemicals can result in **cellular mutations** in the gallbladder epithelial lining.

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: All of the following statements about Gastrointestinal carcinoid tumors are true, Except:

Rectum is spared. ***Rectum is spared*** - This statement is **incorrect**; carcinoid tumors can occur in the rectum, which is often **affected** by such tumors. - It is more accurate to say that carcinoid tumors arise in various gastrointestinal locations, including the **rectum** itself. *Small intestine and appendix account for almost 60% of all gastrointestinal carcinoid* - This statement is **true**; small intestine and appendix are indeed significant sites for carcinoid tumors, together accounting for nearly **60% of cases**. - These locations are particularly prominent due to the number of neuroendocrine cells found in these areas of the **gastrointestinal tract** [1][2]. *5 year survival for carcinoid tumors is >60%* - This statement is **true**, as many patients with localized carcinoid tumors exhibit a **5-year survival rate** greater than 60%. - Survival rates vary depending on the tumor's stage and location, but overall, they tend to have a favorable prognosis when diagnosed early. *Appendicial carcinoids are more common in females than males* - This statement is **true**; studies indicate that appendiceal carcinoids are indeed more frequently diagnosed in **females** compared to males [2]. - This differentiation is one of the notable epidemiological trends observed with carcinoid tumors.

Question 1

MRP2 associated with which of the following?

Accepted Answer

Dubin-Johnson syndrome

Answer

Rotor syndrome

Answer

Crigler-Najjar syndrome

Answer

Gilbert syndrome

Question 2

A 35-year-old male presents with recurrent episodes of abdominal pain, jaundice, and fatigue and underwent MRCP. What will be the most likely diagnosis?

Accepted Answer

Primary sclerosing cholangitis

Answer

Primary biliary cirrhosis

Answer

Caroli’s disease

Answer

Recurrent pyogenic cholangitis

Question 3

Which of the following laboratory values is NOT a component of the MELD score?

Accepted Answer

Albumin

Answer

Serum creatinine

Answer

Serum bilirubin

Answer

International normalized ratio (INR)

Question 4

Which statement is true regarding Crohn's disease?

Accepted Answer

Crohn's disease typically presents with skip lesions.

Answer

Rectum is not involved

Answer

Cobblestone appearance is a classic endoscopic finding.

Answer

Caseating granulomas are a characteristic histological feature.

Question 5

Common cause of chronic pancreatitis

Accepted Answer

Chronic alcohol

Answer

Chronic pancreatic calculi

Answer

pancreas divisum

Answer

Gall bladder stones

Question 6

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 7

A 45 year old lawyer presents with pain in the abdomen more so in the epigastric region that worsens with eating spicy food and is relieved by bending forward. Complications of the above mentioned condition could be all except:

Accepted Answer

Splenic Vein Thrombosis

Answer

Bleeding

Answer

Gastric Outlet Obstruction

Answer

Perforation

Question 8

All of the following may lead to gall bladder carcinoma except which of the following?

Accepted Answer

Echinococcus Granulosus Infection

Answer

Gall Bladder Polyps

Answer

Typhoid carriers

Answer

Exposure to carcinogens like nitrosamine

Question 9

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 10

All of the following statements about Gastrointestinal carcinoid tumors are true, Except:

Accepted Answer

Rectum is spared

Answer

Small intestine and appendix account for almost 60% of all gastrointestinal carcinoid

Answer

Appendicial carcinoids are more common in females than males

Answer

5 year survival for carcinoid tumors is >60%

Gastroenterology — MCQs

Gastroenterology — MCQs

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