Gastroenterology Practice Questions

Q: A 35 year old male presenting with recurrent episodes of abdominal pain, jaundice and fatigue underwent MRCP (shown below). What is the most likely diagnosis?

Primary Sclerosing Cholangitis. ***Primary Sclerosing Cholangitis*** - The MRCP image showing **multiple strictures** and dilatations within the intrahepatic and extrahepatic bile ducts (often described as a **"beaded" appearance**), along with the patient's symptoms of recurrent abdominal pain, jaundice, and fatigue, are classic findings for Primary Sclerosing Cholangitis (PSC). - PSC is a chronic cholestatic liver disease, often associated with **inflammatory bowel disease (IBD)**, particularly ulcerative colitis, and more commonly affects young to middle-aged men. *Oriental Cholangitis* - This condition (also known as recurrent pyogenic cholangitis) is characterized by **intrahepatic bile duct stones** and recurrent bacterial cholangitis, particularly prevalent in East Asia. - While it involves strictures and dilations, the primary driver is often stones and infection, and the demographic and typical MRCP findings are different from the diffuse "beading" seen in PSC. *Primary Biliary Cirrhosis* - Primary Biliary Cirrhosis (PBC) primarily affects the **small intrahepatic bile ducts** and is an autoimmune disease mainly seen in middle-aged women. - While it causes chronic cholestasis and can lead to cirrhosis, the characteristic imaging findings on MRCP as seen here (large duct involvement with diffuse stricturing and beading) are not typical for PBC. *Caroli's Disease* - Caroli's disease is a rare congenital disorder characterized by **segmental cystic dilatation of the intrahepatic bile ducts**. - The imaging findings would show sac-like or cystic dilations of the bile ducts, which is distinct from the diffuse, multifocal strictures and beading pattern observed in the provided MRCP.

Q: On esophageal manometry, spastic contractions in the esophageal body with a distal contractile integral (DCI) >8000 mmHg*s*cm are diagnostic of:

Type III achalasia. ***Type III achalasia*** - This diagnosis is characterized by the presence of **spastic contractions** in the esophageal body, specifically with a **distal contractile integral (DCI) greater than 8000 mmHg*s*cm**, alongside the classic features of achalasia (impaired LES relaxation and absent peristalsis) [1]. - The elevated DCI reflects the **premature and simultaneous contractions** that are hallmark of this subtype, distinguishing it from other motility disorders [1]. *Jackhammer esophagus* - While it also involves very strong esophageal contractions (**high DCI**), jackhammer esophagus (also known as hypercontractile esophagus) does **not present with impaired LES relaxation or absent peristalsis** as seen in achalasia. - The defining feature of jackhammer esophagus is **multiple rapid swallows** (MRS) that induce simultaneous contractions, often with very high vigor. *Type II achalasia* - This type of achalasia is defined by **pan-esophageal pressurization** in more than 20% of swallows, along with impaired LES relaxation and absent peristalsis. - Unlike Type III, it does **not show the spastic hypercontractile activity** in the esophageal body revealed by a very high DCI. *Type I achalasia* - This is the classic form of achalasia characterized by **absent esophageal peristalsis** and **impaired lower esophageal sphincter (LES) relaxation**, without significant esophageal pressurization or spastic contractions [1]. - It represents the most common subtype and lacks the **high DCI spastic activity** seen in Type III achalasia.

Q: All of the following are true about ulcerative colitis except:

Steroid dependent cases need surgery. ***Steroid dependent cases need surgery*** - While **steroid dependency** in ulcerative colitis (UC) indicates a need for alternative or escalate medications, it does not automatically necessitate surgery [1]. - Many steroid-dependent patients can be managed effectively with **immunomodulators** or **biologic therapies**, avoiding surgery. *Surgery is required in a subset of severe cases.* - **Severe ulcerative colitis** that is refractory to medical therapy, or complicated by toxic megacolon, perforation, or severe bleeding, often requires surgical intervention [1]. - This statement is true, as surgery can be curative for UC by removing the affected colon [1]. *Extra-intestinal problems of UC are managed medically* - **Extra-intestinal manifestations** of ulcerative colitis, such as arthritis, skin lesions (erythema nodosum), and eye inflammation (uveitis), are typically managed with medications specific to those conditions, often in conjunction with UC treatment [1], [2]. - This statement is true, as these manifestations rarely require surgical intervention themselves. *The highest risk of UC requiring surgery in 1st year* - The risk of surgery in ulcerative colitis is indeed highest in the **first year after diagnosis**, particularly for patients presenting with severe disease. - This initial period often determines the disease course and responsiveness to medical treatment.

Q: Which is the most common site of gastrinoma in MEN 1 syndrome?

Duodenum. ***Duodenum*** - In **MEN 1 syndrome**, gastrinomas (gastrin-secreting tumors) are most commonly found in the **duodenum**, often multiple and small. - This location accounts for a significant majority of gastrinomas, particularly in patients with **Zollinger-Ellison syndrome (ZES)** associated with MEN 1. *Stomach* - While gastrinomas can occasionally be found in the stomach, this is a **much less common site** compared to the duodenum, especially in the context of MEN 1 syndrome. - Gastric gastrinomas are typically associated with conditions like **atrophic gastritis** and **pernicious anemia**, leading to G-cell hyperplasia and often hypergastrinemia, but tend to be less aggressive. *Ileum* - The **ileum** is an **uncommon site** for gastrinomas; these types of neuroendocrine tumors (NETs) are rarely found there. - NETs in the ileum are more typically associated with the secretion of other hormones, such as **serotonin**, leading to carcinoid syndrome, rather than gastrin. *Jejunum* - Gastrinomas in the **jejunum** are also **rare**, similar to the ileum. - While neuroendocrine tumors can arise throughout the small bowel, the jejunum is not a typical or primary location for gastrin-producing tumors within the context of **MEN 1**.

Q: What is the differentiating feature between irritable bowel syndrome and inflammatory bowel disease?

Stool calprotectin. ***Stool calprotectin*** - **Stool calprotectin** is a reliable biomarker used to differentiate between **Inflammatory Bowel Disease (IBD)** and **Irritable Bowel Syndrome (IBS)**. It's a protein released by neutrophils during intestinal inflammation. - Elevated levels of **calprotectin** strongly suggest **mucosal inflammation** characteristic of IBD (Crohn's disease or ulcerative colitis), while normal levels are typical in IBS, which lacks inflammation [1]. *pain in abdomen* - **Abdominal pain** is a common symptom in both IBS and IBD. In IBS, it's often linked to altered bowel habits and is a key diagnostic criterion [1]. - In IBD, abdominal pain is typically due to inflammation, strictures, or abscesses, but its presence alone does not differentiate the conditions . *Diarrhoea* - **Diarrhea** is a prominent symptom in both IBS and IBD. In IBS, it can be a predominant feature (IBS-D), often associated with urgency [1]. - In IBD, diarrhea is usually due to inflammation disrupting normal absorption and secretion, and it may contain blood or mucus . *Mucus in stools* - The presence of **mucus in stools** can occur in both IBS and IBD. In IBS, it's often present without blood and is generally considered part of altered bowel function [1]. - In IBD, mucus in stools, particularly when accompanied by blood, strongly suggests active intestinal inflammation and mucosal damage .

Q: What is the Child-Pugh class for a patient who has a serum bilirubin of 2.5 mg/dL, serum albumin of 3 g/dL, INR of 2, mild ascites, but no encephalopathy?

Child-Pugh Class B. ***Child-Pugh Class B*** - A serum bilirubin of **2.5 mg/dL** (2 points), serum albumin of **3 g/dL** (2 points), INR of **2** (2 points), and mild ascites (2 points), with no encephalopathy (1 point), sums up to a total of 9 points, which falls into the range for **Child-Pugh Class B** (7-9 points) [1]. - This class indicates **moderate hepatic dysfunction** and is characterized by a higher risk of complications and mortality compared to Class A. *Child-Pugh Class A* - This class is assigned for a total score of **5-6 points**, indicating **well-compensated hepatic disease**. - The patient's total score of 9 points exceeds the threshold for Class A, suggesting more significant liver impairment. *Child-Pugh Class D* - There is no Child-Pugh Class D; the classification system only includes classes A, B, and C. - This option is therefore incorrect based on the established Child-Pugh scoring system. *Child-Pugh Class C* - This class corresponds to a total score of **10-15 points**, indicative of **severe hepatic decompensation**. - The patient's calculated score of 9 points is below the minimum required for Child-Pugh Class C.

Q: Which of the following is false about obstructive jaundice?

Unconjugated bilirubin elevation. ***Unconjugated bilirubin elevation*** - In **obstructive jaundice**, the primary issue is the obstruction of bile flow, preventing conjugated bilirubin (which is water-soluble) from entering the GI tract [1]. - This leads to a buildup of **conjugated bilirubin** in the bloodstream, not unconjugated bilirubin, making this statement false [1]. *Pruritus* - **Pruritus**, or itching, is a common symptom of obstructive jaundice due to the accumulation of **bile salts** in the skin. - These bile salts irritate nerve endings, leading to intense itching. *Icterus* - **Icterus**, or jaundice, is the yellow discoloration of the skin and sclera caused by the accumulation of **bilirubin** (primarily conjugated bilirubin in this case) in the tissues [2]. - This is a hallmark sign of both obstructive and non-obstructive jaundice [2]. *Pale stools* - **Pale stools** (acholic stools) are characteristic of obstructive jaundice because **bilirubin** which gives stool its normal brown color, is unable to reach the intestines [1], [2]. - Undigested fats may also contribute to the pale, sometimes greasy appearance of the stool.

Q: Which is not a component of Ranson's criteria for acute pancreatitis?

Serum lipase. ***Serum lipase*** - **Serum lipase** is not a component of Ranson's criteria. While it is a crucial diagnostic marker for acute pancreatitis, Ranson's criteria focus on other clinical and laboratory values for predicting severity. - The criteria were developed before widespread availability and use of lipase as a primary diagnostic marker for pancreatitis. *Age* - **Age** is a component of Ranson's criteria, specifically "Age > 55 years" for admission and initial assessment [1]. - Older age is associated with increased severity and mortality in acute pancreatitis due to decreased physiologic reserve [1]. *Base deficit* - **Base deficit** is a component of Ranson's criteria, specifically "Base deficit > 4 mEq/L" after 48 hours. - A significant base deficit indicates **metabolic acidosis**, which is a marker of severe systemic inflammation and organ dysfunction in acute pancreatitis. *Blood glucose* - **Blood glucose** is a component of Ranson's criteria, specifically "Blood glucose > 200 mg/dL (11.1 mmol/L)" for admission and initial assessment. - Elevated blood glucose can reflect the severity of pancreatic inflammation and insult to the **islet cells**, or systemic stress response.

Q: In acute pancreatitis, organ failure beyond 48 hours indicates:

Severe pancreatitis. ***Severe pancreatitis*** - **Severe pancreatitis** is defined by the presence of **persistent organ failure**, meaning organ failure lasting longer than 48 hours [1]. - This classification is crucial for predicting prognosis and guiding management, as severe pancreatitis carries a significantly higher risk of complications and mortality [1]. *Critical pancreatitis* - "Critical pancreatitis" is not a standard, recognized classification term in the revised Atlanta Classification for acute pancreatitis. - The classification primarily focuses on differentiating between mild, moderately severe, and severe forms based on local and systemic complications, particularly organ failure [1]. *Mild pancreatitis* - **Mild pancreatitis** is characterized by the absence of organ failure and local or systemic complications [1]. - Patients with mild pancreatitis typically have a benign course and recover without significant morbidity. *Moderately severe* - **Moderately severe pancreatitis** is defined by the presence of **transient organ failure** (resolves within 48 hours) or local complications (e.g., fluid collections, necrosis) without persistent organ failure [1]. - While more serious than mild pancreatitis, it does not involve the sustained organ dysfunction seen in severe cases.

Question 1

A 35 year old male presenting with recurrent episodes of abdominal pain, jaundice and fatigue underwent MRCP (shown below). What is the most likely diagnosis?

Accepted Answer

Primary Sclerosing Cholangitis

Answer

Oriental Cholangitis

Answer

Primary Biliary Cirrhosis

Answer

Carolis Disease

Question 2

On esophageal manometry, spastic contractions in the esophageal body with a distal contractile integral (DCI) >8000 mmHg*s*cm are diagnostic of:

Accepted Answer

Type III achalasia

Answer

Jackhammer esophagus

Answer

Type II achalasia

Answer

Type I achalasia

Question 3

True statement regarding upper GI bleeds:

Accepted Answer

The most common cause of upper GI bleeds is peptic ulcer disease, not variceal bleeding.

Answer

Upper GI bleeding is defined as bleeding originating proximal to the ampulla of Vater, not the ligament of Treitz

Answer

Endoscopic banding is the first-line treatment for all types of upper GI bleeding

Answer

Rockall score is primarily used for immediate treatment decisions rather than risk stratification

Question 4

All of the following are true about ulcerative colitis except:

Accepted Answer

Steroid dependent cases need surgery

Answer

Surgery is required in a subset of severe cases.

Answer

Extra-intestinal problems of UC are managed medically

Answer

The highest risk of UC requiring surgery in 1st year

Question 5

Which is the most common site of gastrinoma in MEN 1 syndrome?

Accepted Answer

Duodenum

Answer

Stomach

Answer

Ileum

Answer

Jejunum

Question 6

What is the differentiating feature between irritable bowel syndrome and inflammatory bowel disease?

Accepted Answer

Stool calprotectin

Answer

pain in abdomen

Answer

Diarrhoea

Answer

Mucus in stools

Question 7

What is the Child-Pugh class for a patient who has a serum bilirubin of 2.5 mg/dL, serum albumin of 3 g/dL, INR of 2, mild ascites, but no encephalopathy?

Accepted Answer

Child-Pugh Class B

Answer

Child-Pugh Class A

Answer

Child-Pugh Class D

Answer

Child-Pugh Class C

Question 8

Which of the following is false about obstructive jaundice?

Accepted Answer

Unconjugated bilirubin elevation

Answer

Pruritus

Answer

Icterus

Answer

Pale stools

Question 9

Which is not a component of Ranson's criteria for acute pancreatitis?

Accepted Answer

Serum lipase

Answer

Age

Answer

Base deficit

Answer

Blood glucose

Question 10

In acute pancreatitis, organ failure beyond 48 hours indicates:

Accepted Answer

Severe pancreatitis

Answer

Critical pancreatitis

Answer

Mild pancreatitis

Answer

Moderately severe

Gastroenterology — MCQs

Gastroenterology — MCQs

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