Gastroenterology

Gastroenterology Indian Medical PG Question 1: Match List-I with List-II and select the correct answer using the code given below the Lists: **List-I (Procedure)** A. Highly selective vagotomy B. Vagotomy with gastrojejunostomy C. Subtotal gastrectomy D. Nissen's fundoplication **List-II (Complication)** 1. Metabolic bone disease 2. Post-prandial gas bloat 3. Lesser curve necrosis 4. Diarrhea **Code:**

• A. A→2 B→1 C→4 D→3
• B. A→2 B→4 C→1 D→3 (Correct Answer)
• C. A→3 B→1 C→4 D→2
• D. A→3 B→4 C→1 D→2

Gastroenterology Explanation: ***A→2 B→4 C→1 D→3*** - **Highly selective vagotomy** (HSV) aims to reduce gastric acid secretion by denervating only the parietal cell mass, sparing the antrum and pylorus. A potential complication due to altered gastric motility and emptying can be **post-prandial gas bloat** or fullness. - **Vagotomy with gastrojejunostomy** involves severing the vagus nerve, which can lead to altered gastrointestinal motility and malabsorption. **Diarrhea** is a common complication due to accelerated transit time and bacterial overgrowth. - **Subtotal gastrectomy** involves the removal of a significant portion of the stomach. This procedure can lead to malabsorption of nutrients, including calcium and vitamin D, resulting in **metabolic bone disease**. - **Nissen's Fundoplication** is a procedure to treat gastroesophageal reflux disease (GERD) by wrapping the gastric fundus around the lower esophageal sphincter. **Lesser curve necrosis** is a rare but severe complication that can occur due to devascularization during the procedure. *A→2 B→1 C→4 D→3* - This option incorrectly associates vagotomy with gastrojejunostomy with metabolic bone disease and subtotal gastrectomy with diarrhea. While diarrhea can occur after gastrectomy, metabolic bone disease is a more specific and significant long-term complication of subtotal gastrectomy due to malabsorption. - Furthermore, this option suggests that metabolic bone disease is a complication of vagotomy with gastrojejunostomy, which is not a primary or common complication of this procedure. *A→3 B→1 C→4 D→2* - This option incorrectly links highly selective vagotomy with lesser curve necrosis and vagotomy with gastrojejunostomy with metabolic bone disease. Lesser curve necrosis is a specific complication linked to Nissen's fundoplication, not HSV. - It also misassociates subtotal gastrectomy with diarrhea as the primary unique complication, and Nissen's fundoplication with post-prandial gas bloat, which is more typical of vagotomy. *A→3 B→4 C→1 D→2* - This option incorrectly pairs highly selective vagotomy with lesser curve necrosis, similar to one of the previous incorrect options. Lesser curve necrosis is a known specific complication of Nissen's fundoplication, not vagotomy. - It also incorrectly links Nissen's fundoplication with post-prandial gas bloat, which is a symptom more commonly associated with procedures that affect gastric emptying, such as vagotomy, rather than fundoplication.

Gastroenterology Indian Medical PG Question 2: Mechanism of action of teduglutide in short bowel syndrome:

• A. GLP-2 analog that inhibits apoptosis (Correct Answer)
• B. HT1A inhibitor
• C. C-peptide analog
• D. GLP-1 analog that inhibits apoptosis

Gastroenterology Explanation: ***GLP-2 analog that inhibits apoptosis*** - **Teduglutide** is a synthetic analog of **glucagon-like peptide-2 (GLP-2)**, which is a naturally occurring human hormone [1]. - Its primary mechanism in **short bowel syndrome** involves promoting mucosal growth and inhibiting epithelial cell apoptosis, thereby enhancing nutrient absorption and gut adaptation. *GLP-1 analogs that inhibits apoptosis* - **GLP-1 analogs** like exenatide or liraglutide are primarily used for **type 2 diabetes mellitus** to stimulate insulin secretion and suppress glucagon [2]. - While they can have some effects on gut motility, their main role is not in promoting mucosal growth or inhibiting apoptosis in the context of short bowel syndrome. *HT1A inhibitor* - **HT1A inhibitors** (5-HT1A receptor antagonists) are typically involved in modulating serotonin pathways, often with applications in conditions like **anxiety** or **depression**. - There is no known direct link between HT1A inhibition and the treatment of short bowel syndrome. *C-peptide analogs* - **C-peptide** is a byproduct of insulin production and has been studied for potential roles in preventing diabetes complications, particularly in relation to **microvascular complications** [3], [4]. - It does not play a direct role as a therapeutic agent for promoting intestinal adaptation or inhibiting apoptosis in short bowel syndrome.

Gastroenterology Indian Medical PG Question 3: 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 4: Which of the following is a component of the Alvarado score?

• A. Leucopenia
• B. Diarrhea
• C. Periumbilical pain
• D. Loss of appetite (Correct Answer)

Gastroenterology Explanation: ***Loss of appetite*** - **Anorexia** (loss of appetite) is a key symptom considered in the Alvarado score, contributing 1 point to the total. - This symptom is often one of the **earliest indicators** of acute appendicitis. *Leucopenia* - The Alvarado score uses **leukocytosis** (elevated white blood cell count greater than 10,000/mm³), not leucopenia, as a component. - **Leucopenia** (decreased white blood cell count) is generally not indicative of acute appendicitis. *Diarrhea* - While diarrhea can sometimes accompany appendicitis, it is **not a specific component** of the Alvarado score. - The score focuses on classic appendicitis symptoms like **migratory and right lower quadrant pain**. *Periumbilical pain* - The Alvarado score specifically considers **migratory pain to the right iliac fossa** (RLQ tenderness) as a component, not just periumbilical pain. - Although pain often starts periumbilically, the score emphasizes the **subsequent migration** of pain.

Gastroenterology Indian Medical PG Question 5: Which one of the following is the investigation of choice in a patient with haematemesis?

• A. Flexible upper gastrointestinal endoscopy (Correct Answer)
• B. Contrast enhanced CT scan
• C. Barium meal for stomach and duodenum
• D. Selective left gastric angiography

Gastroenterology Explanation: ***Flexible upper gastrointestinal endoscopy*** - This is the **investigation of choice** for haematemesis as it allows for direct visualization of the upper gastrointestinal tract to identify the source of bleeding [1]. - It also enables **therapeutic intervention**, such as injection sclerotherapy, banding, or clip application, to stop the bleeding [1]. *Contrast enhanced CT scan* - A CT scan is generally **not the primary investigation** for acute haematemesis because it offers less diagnostic accuracy for mucosal lesions and cannot provide therapeutic intervention [1]. - While it can identify large bleeds or structural abnormalities, it is **less sensitive for smaller bleeds** or subtle mucosal abnormalities compared to endoscopy. *Barium meal for stomach and duodenum* - A barium meal is **contraindicated in acute gastrointestinal bleeding** as the barium can obscure endoscopic views and interfere with subsequent attempts at endoscopy or angiography [1]. - It provides **limited diagnostic information** about the active bleeding site and offers no therapeutic capabilities. *Selective left gastric angiography* - Angiography is typically reserved for cases of **severe, persistent bleeding** where endoscopy has failed to locate or control the bleed. - It is an **invasive procedure** with potential complications and is not indicated as the initial diagnostic investigation.

Gastroenterology Flashcard 1 of 5

Question: Basal acid output >_____meq/h in the presence of hypergastrinemia is considered pathognomonic of Zollinger Ellison Syndrome

Answer: 15

Gastroenterology Flashcard 2 of 5

Question: Ileus may occur in conditions associated with Volume _____.

Answer: deficit

Gastroenterology Flashcard 3 of 5

Question: Two types of sphincter of Oddi dysfunction are: _____ SOD and Pancreatic SOD

Answer: Biliary

Gastroenterology Flashcard 4 of 5

Question: _____ classification is used for assessing severity of acute pancreatitis

Answer: Atlanta

Gastroenterology Flashcard 5 of 5

Question: Complications of diverticulosis include _____ rectal bleeding (hematochezia)

Answer: painless