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 Indian Medical PG Question 6: A child presents with abdominal pain, arthralgia, hematuria, and hypertension. What is the diagnosis?

• A. Dengue
• B. Rheumatic fever
• C. Henoch-Schönlein Purpura
• D. Hemolytic uremic syndrome (Correct Answer)

Gastroenterology Explanation: ***Hemolytic uremic syndrome*** - The combination of **abdominal pain**, **hematuria**, and **hypertension** in a child, particularly after a diarrheal illness, is highly suggestive of **hemolytic uremic syndrome (HUS)** [1], [2]. - HUS is characterized by **microangiopathic hemolytic anemia**, **thrombocytopenia**, and **acute kidney injury**, which can manifest as hematuria and hypertension [1], [2]. *Dengue* - While **abdominal pain** and **arthralgia** can be symptoms of dengue, it typically also presents with **fever**, **rash**, and **bleeding manifestations** like petechiae or mucosal bleeding. - Dengue does not typically cause **hematuria** with **hypertension** as a primary feature of renal involvement. *Rheumatic fever* - **Rheumatic fever** is characterized by **arthralgia** (migratory arthritis), but it is primarily a sequela of **Streptococcal pharyngitis** and presents with **carditis**, **chorea**, **erythema marginatum**, and **subcutaneous nodules**. - It does not typically cause the combination of **abdominal pain**, **hematuria**, and **hypertension** seen here. *Henoch-Schönlein Purpura* - **Henoch-Schönlein Purpura (HSP)** involves **abdominal pain**, **arthralgia**, and **hematuria**, and can sometimes cause hypertension. - However, the hallmark of HSP is a **palpable purpuric rash** on the lower extremities and buttocks, which is not mentioned in the patient's presentation.

Gastroenterology Indian Medical PG Question 7: Which statement is true regarding Crohn's disease?

• A. Skip lesions visualized in endoscopy (Correct Answer)
• B. Non-caseating granulomas present
• C. Cobblestone appearance of the intestinal mucosa
• D. Rectum involvement is less common but possible

Gastroenterology Explanation: ***Continuous lesion visualized in endoscopy*** - Crohn's disease typically presents with **discontinuous lesions** (skip lesions) [1] rather than continuous ones, which is characteristic of ulcerative colitis [2]. - Therefore, stating that Crohn's disease shows continuous lesions is **incorrect**. *Rectum is not involved* - While Crohn's disease can primarily affect any part of the gastrointestinal tract, it can indeed involve the **rectum** in some cases. - **Ileitis and colitis** are common manifestations [1], and the statement does not hold true universally. *Non caseating granulomas* - Crohn's disease is **characterized by non-caseating granulomas**, which are considered one of its hallmark histopathological features [2]. - This statement is true, making it an incorrect choice for the question. *Cobblestone appearance* - The **cobblestone appearance** is indeed a classic feature seen in Crohn's disease due to the presence of alternating areas of inflammation and ulceration [1]. - Thus, this statement accurately reflects a known characteristic of Crohn's disease; therefore, it does not qualify as not true.

Gastroenterology Indian Medical PG Question 8: Normal 24-hour gastric acid output in stomach is

• A. 300-400 mEq
• B. 20-40 mEq
• C. 100-200 mEq (Correct Answer)
• D. 15-20 mEq

Gastroenterology Explanation: ***100-200 mEq*** - The normal 24-hour gastric acid output in the stomach is typically within the range of **100-200 mEq**. - This range reflects the baseline secretory activity of **parietal cells** in the absence of significant stimulation. *300-400 mEq* - This range is generally **higher than normal** and might be observed in conditions like **Zollinger-Ellison syndrome**, where there is excessive gastrin production. - Such elevated output would indicate a pathological state of **hypersecretion**. *20-40 mEq* - This range represents a **lower-than-normal** gastric acid output, potentially indicating conditions like **atrophic gastritis** or **achlorhydria**. - Severely reduced acid production can compromise digestion and increase susceptibility to certain infections. *15-20 mEq* - This range is **significantly lower** than the normal gastric acid output. - Such a low level would be considered indicative of **hypochlorhydria** or **achlorhydria**, which can impair nutrient absorption and create an environment susceptible to bacterial overgrowth.

Gastroenterology Indian Medical PG Question 9: The triad of diabetes, gallstones, and steatorrhea is associated with which of the following?

• A. Somatostatinomas (Correct Answer)
• B. VIPomas
• C. Gastrinomas
• D. Glucagonomas

Gastroenterology Explanation: ***Somatostatinomas*** - This **triad** is characteristic of a somatostatinoma, as somatostatin inhibits insulin release, gallbladder contraction, and pancreatic enzyme secretion. - The inhibition of **insulin release** leads to diabetes [1], blocked **cholecystokinin (CCK)** release causes gallstones, and reduced **pancreatic enzyme** secretion results in steatorrhea. *Gastrinomas* - Gastrinomas typically cause **Zollinger-Ellison syndrome**, characterized by severe peptic ulcers and diarrhea due to excessive acid production. - They are not directly associated with the specific triad of diabetes, gallstones, and steatorrhea. *VIPomas* - VIPomas are known for causing **Verner-Morrison syndrome** or pancreatic cholera, leading to severe watery diarrhea, hypokalemia, and achlorhydria. - Diabetes and gallstones are not prominent features of VIPomas. *Glucagonomas* - Glucagonomas primarily manifest with **diabetes** (due to elevated glucagon), a characteristic skin rash called **necrolytic migratory erythema**, and weight loss [1]. - While diabetes is present, gallstones and steatorrhea are not typical associations.

Gastroenterology Indian Medical PG Question 10: Inhibition of myenteric plexus results in

• A. Hyperacidity
• B. Diarrhea
• C. Decreased gut motility (Correct Answer)
• D. Increased secretions

Gastroenterology Explanation: ***Decreased gut motility*** - The **myenteric plexus** (Auerbach's plexus) is primarily responsible for regulating **gastrointestinal motility**, including peristalsis and muscle contraction. - Its inhibition would therefore lead to **reduced peristaltic movements** and **decreased gut motility**. *Hyperacidity* - **Gastric acid secretion** is mainly regulated by the vagus nerve (via acetylcholine), gastrin, and histamine, not directly by the myenteric plexus. - While gut motility can indirectly affect acid exposure, a primary and direct consequence of myenteric plexus inhibition is not hyperacidity. *Diarrhea* - **Diarrhea** is typically caused by increased gut motility, increased secretion, or decreased absorption. - Inhibition of the myenteric plexus would lead to **decreased motility**, making diarrhea an unlikely outcome. *Increased secretions* - **Gastrointestinal secretions** are largely controlled by the submucosal plexus (Meissner's plexus) and hormonal factors. - While the myenteric plexus has some indirect influence, its primary role is motility, and its inhibition would not directly lead to increased secretions.

Gastroenterology Flashcard 1 of 10

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

Answer: 15

Gastroenterology Flashcard 2 of 10

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

Answer: deficit

Gastroenterology Flashcard 3 of 10

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

Answer: Biliary

Gastroenterology Flashcard 4 of 10

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

Answer: Atlanta

Gastroenterology Flashcard 5 of 10

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

Answer: painless

Gastroenterology Flashcard 6 of 10

Question: _____ classification is used for classifying the endoscopic appearance of bleeding peptic ulcers.

Answer: Forrest

Gastroenterology Flashcard 7 of 10

Question: Patients can improve symptoms of dumping syndrome by avoiding _____ meals and have low dietary intake of simple sugars

Answer: large

Gastroenterology Flashcard 8 of 10

Question: Zollinger-Ellison syndrome is characterized by acid hypersecretion, causing recurrent _____ in the duodenum and jejunum

Answer: ulcers

Gastroenterology Flashcard 9 of 10

Question: A- _____- Continuous involvement B - _____ - Cobblestone appearence

Answer: Ulcerative colitis

Gastroenterology Flashcard 10 of 10

Question: Toxic megacolon is defined as the dilatation of the transverse colon to a diameter of more than _____ cm

Answer: 6