Gastroenterology Practice Questions

Q: All of the following drugs may be used in the treatment of ulcerative colitis except:

Methotrexate. ***Methotrexate*** - While methotrexate is an immunosuppressant used in some autoimmune conditions, it is **not a first-line or commonly used drug for ulcerative colitis**. [2] - Its role in inflammatory bowel disease is primarily established for **Crohn's disease**, not ulcerative colitis. *Corticosteroids* - **Corticosteroids** are commonly used for inducing remission in **moderate to severe ulcerative colitis** due to their potent anti-inflammatory effects. [1] - They are effective for short-term management of flares but are not suitable for long-term maintenance therapy due to significant side effects. *Sulfasalazine* - **Sulfasalazine** is an aminosalicylate (5-ASA) drug, frequently used for the **induction and maintenance of remission in mild to moderate ulcerative colitis**. [1] - It works by reducing inflammation in the colon. *Azathioprine* - **Azathioprine** is an immunosuppressant often used for **maintaining remission in moderate to severe ulcerative colitis** when corticosteroids cannot be tapered or are ineffective. - It helps reduce the need for long-term corticosteroid use and can prevent disease flares.

Q: Portal hypertension is said to be present if portal venous pressure is more than:

10 mm Hg. ***10 mm Hg*** - Portal hypertension is defined by a **hepatic venous pressure gradient (HVPG)** greater than 5 mmHg, but significant clinical consequences usually arise when the **portal venous pressure** exceeds **10 mmHg** [1]. - A persistent elevation above this threshold leads to the development of complications such as **ascites**, **varices**, and **splenomegaly** [1]. *3-5 mm Hg* - A portosystemic gradient of 3-5 mmHg is considered **normal portal pressure**, indicating no significant obstruction or resistance to portal flow [1]. - Pressures within this range do not cause the clinical manifestations associated with portal hypertension. *5-10 mm Hg* - While a **hepatic venous pressure gradient (HVPG)** greater than 5 mmHg technically defines portal hypertension, clinical symptoms typically do not appear until the pressure exceeds 10 mmHg [1]. - This range represents **mild portal hypertension** which may not be clinically significant. *12-15 mm Hg* - Pressures in the range of 12-15 mmHg indicate **severe portal hypertension**, which is often associated with a high risk of complications such as **esophageal variceal bleeding**. - This is a critical threshold for developing serious clinical sequelae, not the lower limit for defining portal hypertension.

Q: Which of the following is the most specific risk factor for esophageal cancer in Plummer-Vinson syndrome?

Associated with esophageal webs. ***Risk factor for adenocarcinoma*** - Patterson-Kelly-Brown syndrome is **not** known to be a direct risk factor for adenocarcinoma, which makes this statement false. - The syndrome primarily involves esophageal symptoms without a proven link to increased cancer risk. *Anemia* - Anemia is a common feature in Patterson-Kelly-Brown syndrome due to **iron deficiency** from poor dietary intake or malabsorption. - It may also result from chronic blood loss associated with esophageal webs. *Esophageal webs* - Esophageal webs are a hallmark of Patterson-Kelly-Brown syndrome, causing **dysphagia** and other swallowing difficulties. - They are formed due to mucosal alterations and are a classic manifestation of the condition. *Glossitis* - Glossitis, or inflammation of the tongue, is often observed in patients with Patterson-Kelly-Brown syndrome due to **iron deficiency** and **nutritional deficiencies**. - It is associated with the underlying nutritional issues that often accompany the syndrome.

Q: Which of the following is the first-line treatment for Wilson's disease?

Penicillamine. ***Penicillamine*** - **Penicillamine** is the **traditional first-line treatment** for Wilson's disease according to international guidelines (AASLD, EASL) and standard medical practice. - It is a **copper chelator** that binds to copper and promotes its urinary excretion, effectively reducing copper accumulation in tissues. - It is used for both **initial treatment** of symptomatic patients (hepatic or neurological) and for **presymptomatic patients**. - Common side effects include early hypersensitivity reactions, bone marrow suppression, proteinuria, and late autoimmune phenomena, but it remains the most widely used first-line agent. *Trientine* - **Trientine** is a **second-line copper chelator** used when patients are **intolerant to penicillamine** or develop adverse effects. - It has a **better safety profile** than penicillamine with fewer side effects, but is reserved as an alternative rather than initial therapy. - It works similarly by chelating copper and promoting urinary excretion. *Zinc acetate* - **Zinc acetate** is primarily used for **maintenance therapy** in stable patients or for **presymptomatic patients** detected through family screening. - It works by **blocking intestinal copper absorption** by inducing metallothionein in enterocytes. - It is **not effective for initial treatment** of symptomatic patients as it does not remove existing copper stores and takes months to be effective. *Deferasirox* - **Deferasirox** is an **iron chelator** used to treat iron overload in conditions like thalassemia major. - It has **no role in Wilson's disease**, which involves copper overload, not iron.

Q: Autoimmune gastritis is associated with a deficiency of which vitamin?

Vitamin B12. ***B12*** - Autoimmune gastritis leads to destruction of **parietal cells** in the stomach, impairing intrinsic factor production, crucial for vitamin B12 absorption [2]. - Vitamin B12 deficiency can lead to **megaloblastic anemia** and neurological complications due to its key role in DNA synthesis and nerve function [1]. *C* - Vitamin C deficiency is associated with **scurvy**, which is unrelated to autoimmune gastritis and is not a consequence of gastric issues. - This vitamin primarily concerns skin health, collagen synthesis, and immune function, making it irrelevant in this context. *A* - Vitamin A deficiency is associated with **vision problems** and immune function, but it does not have a direct link to autoimmune gastritis. - Unlike B12, vitamin A is not specifically affected by the gastric conditions related to autoimmune processes. *D* - Vitamin D deficiency relates to **bone health** and calcium metabolism, and is not connected to the effects of autoimmune gastritis. - This vitamin's absorption primarily occurs in the intestines rather than involving gastric intrinsic factor or parietal cells.

Q: Blood group most commonly associated with gastric carcinoma is

Blood group A. ***Blood group A*** - Individuals with **blood group A** have been statistically shown to have a higher risk of developing **gastric carcinoma**. - This association is thought to be related to the presence of **A antigens**, which may influence cell adhesion and immune response in the gastric mucosa. *Blood Group O* - Blood group O is more commonly associated with an increased risk of **peptic ulcer disease**, particularly **duodenal ulcers**. - It does not show a strong positive correlation with the development of gastric carcinoma. *Blood group AB* - Blood group AB is the rarest blood type and the association with gastric carcinoma risk is not as significant or well-established compared to blood group A. - While showing some increased risk, it is less pronounced than for blood group A. *Blood group B* - Individuals with blood group B do not show a significant or commonly acknowledged increased risk for gastric carcinoma. - Research has not identified a strong correlation between blood group B and the development of this type of cancer.

Q: Gold standard investigation for chronic pancreatitis?

Endoscopic Retrograde Cholangiopancreatography (ERCP). ***Endoscopic Retrograde Cholangiopancreatography (ERCP)*** - ERCP is considered the **gold standard** for diagnosing chronic pancreatitis due to its ability to directly visualize the pancreatic duct system and detect subtle changes [1]. - It allows for direct imaging of ductal abnormalities like **strictures**, **dilatations**, and **calculi**, which are characteristic of chronic pancreatitis [1]. *MRI (Magnetic Resonance Imaging)* - While MRI, particularly **MRCP (Magnetic Resonance Cholangiopancreatography)**, is excellent for visualizing the pancreatic duct, it is generally less sensitive than ERCP for early or subtle changes in chronic pancreatitis [1]. - It is a **non-invasive** imaging technique but lacks the therapeutic and detailed ductal visualization capabilities of ERCP [1]. *Endoscopic Ultrasound (EUS)* - EUS is highly sensitive for detecting early parenchymal and ductal changes in chronic pancreatitis, such as **lobularity**, **stranding**, and small calculi. - Although it has high sensitivity, it is not considered the gold standard due to its operator dependence and inability to directly intervene or provide detailed ductal morphology as precisely as ERCP. *Pancreatic function tests* - Pancreatic function tests, such as the **secretin stimulation test**, assess the **exocrine function** of the pancreas by measuring enzyme or bicarbonate output [1]. - These tests are **indirect measures** of pancreatic damage and do not provide anatomical information about the pancreatic duct or parenchyma, making them less definitive for diagnosis compared to imaging [1].

Q: What is the most common cause of pyogenic liver abscess?

Biliary tract infection. ***Biliary tract infection*** - **Ascending cholangitis**, often due to obstruction from stones or strictures, allows bacteria to ascend into the liver, making it the most frequent cause of **pyogenic liver abscess** [1]. - Pathogens typically involved are **enteric gram-negative rods** (e.g., *E. coli, Klebsiella*) and **enterococci**, which commonly colonize the biliary tree. *Stricture of CBD* - While a **stricture of the Common Bile Duct (CBD)** can lead to biliary stasis and **cholangitis**, it is a *cause* within the broader category of biliary tract infections, rather than the most common *overall cause* of pyogenic liver abscess [1]. - The stricture itself creates an environment prone to infection, but the actual infection of the biliary tract is the direct preceding event. *Appendicitis* - **Appendicitis** can lead to liver abscesses via the **portal vein** (pylephlebitis) if bacteremia from the inflamed appendix spreads to the liver. - However, this is a less common pathway compared to direct extension from biliary infections. *Sigmoid Diverticulitis* - **Sigmoid diverticulitis** can also cause liver abscesses through **pylephlebitis**, where bacteria from the infected diverticula spread via the portal venous system. - Similar to appendicitis, this is a less frequent cause of pyogenic liver abscess compared to biliary tract disease.

Q: A patient presents with acute abdominal pain that is sharp and radiates to the back. Considering the patient's history of cholecystitis, what is the most likely diagnosis?

Acute pancreatitis. ***Acute pancreatitis*** - The combination of **severe acute abdominal pain** that radiates to the back, especially in a patient with a history of **cholecystitis** (gallstones being a common cause), is highly suggestive of acute pancreatitis [1]. - **Gallstone pancreatitis** occurs when a gallstone obstructs the pancreatic duct, leading to enzyme auto-digestion of the pancreas [2]. *Cholecystitis* - While the patient has a history of cholecystitis, the current symptom of pain radiating to the back is more characteristic of pancreatitis. - **Acute cholecystitis** typically presents with right upper quadrant pain, often radiating to the right shoulder or scapula, sometimes after a fatty meal [3]. *Appendicitis* - **Appendicitis** typically presents with periumbilical pain migrating to the right lower quadrant, and does not commonly radiate to the back. - It is not directly linked to a history of cholecystitis or gallstones as a causative factor. *Aortic aneurysm* - An **abdominal aortic aneurysm (AAA) rupture** can cause severe, sudden abdominal or back pain, but it is not typically associated with a history of cholecystitis as a predisposing factor for the acute presentation. - AAA pain is often described as tearing or ripping, and carries signs of hemodynamic instability.

Q: Investigation of choice for a 74-year-old male patient with scanty bleeding per rectum and irregular bowel habits.

Colonoscopy. ***Colonoscopy*** - **Colonoscopy** is the investigation of choice for **lower gastrointestinal bleeding** and **changes in bowel habits** in older patients due to its ability to visualize the entire colon [1]. - It allows for direct visualization of mucosal abnormalities, **biopsy** acquisition for histological diagnosis, and **polypectomy** for therapeutic intervention [1]. *Sigmoidoscopy* - **Sigmoidoscopy** only visualizes the **rectum** and **distal sigmoid colon**, which could miss lesions higher up responsible for the symptoms [2]. - Given the patient's age and symptoms, more proximal colorectal pathology, such as **colon cancer**, must be excluded [1]. *Barium meal follow through* - A **barium meal follow through** is used to evaluate the **esophagus**, **stomach**, and **small intestine**, not the colon. - It is not suitable for investigating rectal bleeding or irregular bowel habits, which are typically colonic symptoms. *Barium enema* - A **barium enema** is an X-ray study that outlines the colon but is less sensitive than colonoscopy for detecting small lesions, polyps, or early cancers [1]. - It does not allow for **biopsy** or **polypectomy**, which are crucial for definitive diagnosis and treatment [1].

Question 1

All of the following drugs may be used in the treatment of ulcerative colitis except:

Accepted Answer

Methotrexate

Answer

Corticosteroids

Answer

Sulfasalazine

Answer

Azathioprine

Question 2

Portal hypertension is said to be present if portal venous pressure is more than:

Accepted Answer

10 mm Hg

Answer

3-5 mm Hg

Answer

5-10 mm Hg

Answer

12-15 mm Hg

Question 3

Which of the following is the most specific risk factor for esophageal cancer in Plummer-Vinson syndrome?

Accepted Answer

Associated with esophageal webs

Answer

Risk factor for adenocarcinoma

Answer

Associated with iron-deficiency anemia

Answer

Causes glossitis

Question 4

Which of the following is the first-line treatment for Wilson's disease?

Accepted Answer

Penicillamine

Answer

Deferasirox

Answer

Zinc acetate

Answer

Trientine

Question 5

Autoimmune gastritis is associated with a deficiency of which vitamin?

Accepted Answer

Vitamin B12

Answer

Vitamin C

Answer

Vitamin D

Answer

Vitamin A

Question 6

Blood group most commonly associated with gastric carcinoma is

Accepted Answer

Blood group A

Answer

Blood Group 0

Answer

Blood group AB

Answer

Blood group B

Question 7

Gold standard investigation for chronic pancreatitis?

Accepted Answer

Endoscopic Retrograde Cholangiopancreatography (ERCP)

Answer

Endoscopic Ultrasound (EUS)

Answer

MRI (Magnetic Resonance Imaging)

Answer

Pancreatic function tests

Question 8

What is the most common cause of pyogenic liver abscess?

Accepted Answer

Biliary tract infection

Answer

Stricture of CBD

Answer

Sigmoid Diverticulitis

Answer

Appendicitis

Question 9

A patient presents with acute abdominal pain that is sharp and radiates to the back. Considering the patient's history of cholecystitis, what is the most likely diagnosis?

Accepted Answer

Acute pancreatitis

Answer

Cholecystitis

Answer

Appendicitis

Answer

Aortic aneurysm

Question 10

Investigation of choice for a 74-year-old male patient with scanty bleeding per rectum and irregular bowel habits.

Accepted Answer

Colonoscopy

Answer

Sigmoidoscopy

Answer

Barium meal follow through

Answer

Barium enema

Gastroenterology — MCQs

Gastroenterology — MCQs

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