Gastroenterology Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Gastroenterology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Gastroenterology Indian Medical PG Question 1: Which of the following is a type of inflammatory bowel disease primarily affecting the small intestine? a) Coeliac disease b) Tropical sprue c) Regional ileitis d) Cystic fibrosis e) Ulcerative colitis
- A. Ulcerative colitis
- B. Cystic fibrosis
- C. Tropical sprue
- D. Regional ileitis (Correct Answer)
- E. Coeliac disease
Gastroenterology Explanation: ***Regional ileitis***
- **Regional ileitis** is another name for **Crohn's disease** when it primarily affects the **ileum**, which is part of the small intestine [1].
- Crohn's disease is a type of **inflammatory bowel disease (IBD)** [1] characterized by **transmural inflammation** that can affect any part of the gastrointestinal tract, but most commonly involves the small intestine.
*Ulcerative colitis*
- **Ulcerative colitis** is an **inflammatory bowel disease** that exclusively affects the **large intestine (colon and rectum)** [2].
- Unlike Crohn's disease, it involves continuous inflammation of the mucosa and submucosa, usually starting in the rectum and extending proximally [2].
*Cystic fibrosis*
- **Cystic fibrosis** is a **genetic disorder** that affects the lungs, pancreas, liver, and intestine, leading to the production of **thick, sticky mucus**.
- While it can cause malabsorption and intestinal issues due to pancreatic insufficiency, it is not primarily an inflammatory bowel disease in itself.
*Tropical sprue*
- **Tropical sprue** is a malabsorption syndrome thought to be caused by **environmental factors and microbial changes** in the small intestine, typically affecting individuals in tropical regions [3].
- It results in abnormal small intestinal architecture and nutrient malabsorption, but it is not classified as an inflammatory bowel disease like Crohn's or ulcerative colitis.
*Coeliac disease*
- **Coeliac disease** is an **immune-mediated condition** triggered by the ingestion of **gluten**, leading to damage of the small intestinal villi [3].
- While it affects the small intestine and involves an immune response, it is distinct from inflammatory bowel diseases which are characterized by chronic, relapsing inflammation of the GI tract.
Gastroenterology Indian Medical PG Question 2: Initial treatment for management of mild to moderate Crohn's disease is:
- A. Mesalamine
- B. Infliximab
- C. Sulfasalazine
- D. Budesonide (Correct Answer)
Gastroenterology Explanation: ***Budesonide***
- **Budesonide** is a **steroid** with high first-pass metabolism, meaning it works locally in the gastrointestinal tract with minimal systemic effects, making it suitable for mild to moderate Crohn's disease.
- It is effective in inducing remission for mild to moderate ileocolonic Crohn's disease, with a better safety profile than systemic corticosteroids.
*Mesalamine*
- **Mesalamine (5-ASA)** is primarily used for **ulcerative colitis** and has limited efficacy in Crohn's disease, especially for moderate disease.
- While it can be considered for very mild Crohn's disease, its role is often debated and not a first-line agent for moderate cases.
*Infliximab*
- **Infliximab** is a **biologic agent (anti-TNF-α)** used for moderate to severe Crohn's disease or for patients who have failed conventional therapy.
- It works by blocking a key inflammatory cytokine and is not typically used as initial treatment for mild disease due to its potency and potential side effects.
*Sulfasalazine*
- **Sulfasalazine** is more effective in **colonic Crohn's disease** and **ulcerative colitis**, and its efficacy in small bowel Crohn's disease is limited [1].
- Many patients experience side effects such as **nausea**, **headaches**, and **allergic reactions**, limiting its use as a first-line agent.
Gastroenterology Indian Medical PG Question 3: The drug used in steroid-refractory acute severe ulcerative colitis is:
- A. Steroids
- B. Infliximab
- C. Cyclosporine (Correct Answer)
- D. Sulfasalazine
Gastroenterology Explanation: ***Cyclosporine***
- **Cyclosporine** is an effective **calcineurin inhibitor** used in cases of **acute severe ulcerative colitis** that are refractory to steroid therapy [1].
- It acts by suppressing the immune system and reducing inflammation in the colon, thereby preventing colectomy [1].
*Sulfasalazine*
- **Sulfasalazine** is an **aminosalicylate** commonly used for mild to moderate ulcerative colitis, particularly for maintaining remission [1].
- It is not considered a primary treatment for **acute severe, steroid-refractory** disease [1].
*Steroids*
- The question explicitly states "steroid-refractory," meaning the patient has already failed **steroid therapy** [1].
- Therefore, using **steroids** again as the primary intervention for this specific clinical scenario would not be appropriate.
*Infliximab*
- **Infliximab**, an **anti-TNF-α agent**, is also used in steroid-refractory acute severe ulcerative colitis [1].
- However, **cyclosporine** has a **more rapid onset of action** which makes it a preferred initial option in severe cases; Infliximab is often considered after cyclosporine failure or in scenarios where cyclosporine is contraindicated.
Gastroenterology Indian Medical PG Question 4: A patient presents to the OPD with recurrent diarrhea, abdominal pain, and foul-smelling stools. The colonoscopy reveals the following findings. What is the most likely diagnosis?
- A. Pseudomembranous colitis (Correct Answer)
- B. FAP (Familial Adenomatous Polyposis)
- C. Ulcerative colitis
- D. Acute gastritis
Gastroenterology Explanation: ***Pseudomembranous colitis***
- The image clearly shows **yellowish-white plaques or pseudomembranes** scattered over the inflamed colonic mucosa, which are characteristic endoscopic findings of **pseudomembranous colitis**.
- The clinical symptoms of **recurrent diarrhea**, **abdominal pain**, and **foul-smelling stools** are consistent with this diagnosis, often caused by *Clostridioides difficile* infection.
*FAP (Familial Adenomatous Polyposis)*
- FAP is characterized by hundreds to thousands of **adenomatous polyps** throughout the colon, usually **smaller and more uniform** in appearance than the pseudomembranes seen here.
- While it can cause diarrhea and abdominal pain, the endoscopic appearance of discrete polyps rather than diffuse pseudomembranes differentiates it from the image shown.
*Ulcerative colitis*
- Ulcerative colitis typically presents with **continuous inflammation** of the colon, often involving **ulcerations, friability, and loss of haustra**, without the distinct pseudomembranes.
- Symptoms usually include **bloody diarrhea** and tenesmus, which differ from the foul-smelling stools mentioned.
*Acute gastritis*
- Acute gastritis is an inflammation of the **stomach lining**, not the colon, and would not be diagnosed via colonoscopy.
- Symptoms are usually upper GI-related, such as **epigastric pain, nausea, and vomiting**, not recurrent diarrhea and foul-smelling stools.
Gastroenterology Indian Medical PG Question 5: Which of the following is a characteristic feature of Crohn's disease?
- A. Sinus & fistula (Correct Answer)
- B. Mesenteric lymphadenitis
- C. Continuous involvement
- D. Crypt abscesses
Gastroenterology Explanation: ***Sinus & fistula***
- **Transmural inflammation**, a hallmark of Crohn's disease, can extend through the bowel wall, leading to the formation of **sinus tracts** and **fistulae** (abnormal connections between organs or to the skin). [1]
- These complications include enteroenteric, enterovesical, and perianal fistulae, which are highly characteristic of Crohn's. [1]
*Continuous involvement*
- Crohn's disease is characterized by **skip lesions**, meaning there are healthy segments of bowel interspersed with diseased segments, not continuous involvement. [1]
- **Ulcerative colitis** typically presents with continuous inflammation, starting from the rectum and extending proximally. [1]
*Mesenteric lymphadenitis*
- While mesenteric lymph nodes can be involved in Crohn's disease due to inflammation, **mesenteric lymphadenitis** is more commonly associated with infectious etiologies or other inflammatory conditions, and not a primary defining characteristic.
- It refers to inflammation of lymph nodes in the mesentery, which can cause abdominal pain but does not specifically differentiate Crohn's from other conditions.
*Crypt abscesses*
- **Crypt abscesses** are a characteristic histological feature of **ulcerative colitis**, where neutrophils infiltrate the glandular crypts. [1]
- While they can occasionally be seen in Crohn's, they are much more common and prominent in ulcerative colitis and are not a defining feature of Crohn's.
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