Gastroenterology Practice Questions

Q: Which of the following is NOT a diagnostic criterion for irritable bowel syndrome?

Nocturnal episodes of colicky pain. The diagnosis of Irritable Bowel Syndrome (IBS) is based on the **Rome IV Criteria**, which defines it as a functional bowel disorder characterized by recurrent abdominal pain. **1. Why Option B is the Correct Answer:** IBS is a functional disorder, meaning it does not involve structural or biochemical abnormalities. A hallmark of functional gastrointestinal disorders is that symptoms typically occur during waking hours. **Nocturnal pain** or diarrhea that awakens a patient from sleep is considered a **"Red Flag" (Alarm Symptom)** [1]. Its presence suggests an organic pathology, such as Inflammatory Bowel Disease (IBD), malignancy, or chronic infection, rather than IBS [1]. **2. Analysis of Incorrect Options (Rome IV Criteria):** According to Rome IV, IBS is defined as recurrent abdominal pain (at least 1 day/week in the last 3 months) associated with **two or more** of the following: * **Option A (Related to defecation):** Pain is typically related to defecation (it may improve or, in some cases, worsen after passing stool) [1]. * **Option C (Change in frequency):** The pain is associated with a change in how often the patient has a bowel movement [1]. * **Option D (Change in form):** The pain is associated with a change in the appearance of stool (e.g., Bristol Stool Scale changes from Type 1 to Type 7) [1]. **Clinical Pearls for NEET-PG:** * **Manning Criteria:** An older diagnostic tool; "mucus in stools" and "feeling of incomplete evacuation" are features of Manning but not core Rome IV criteria [1]. * **Alarm Symptoms (Not IBS):** Weight loss (>10%), fever, occult blood in stools, anemia, and onset after age 50 [1]. * **Treatment High-Yield:** First-line treatment involves lifestyle modification and FODMAP diet. For IBS-C (Constipation), use **Lubiprostone** or **Linaclotide**; for IBS-D (Diarrhea), use **Loperamide** or **Rifaximin**.

Q: Capsule endoscopy is used for which of the following conditions?

Gastrointestinal bleeding. **Explanation:** **Capsule Endoscopy (CE)** is a non-invasive diagnostic tool primarily used to visualize the **small intestine**, an area often referred to as the "black box" of the GI tract because it is difficult to reach via conventional upper endoscopy or colonoscopy. **Why Gastrointestinal Bleeding is Correct:** The primary indication for capsule endoscopy is **Obscure Gastrointestinal Bleeding (OGIB)**. When a patient presents with persistent GI bleeding (melena or hematochezia) but has negative findings on both gastroscopy and colonoscopy, the source is likely in the small bowel (e.g., angiodysplasia, Crohn’s disease, or small bowel tumors). CE allows for high-resolution mucosal imaging of the entire jejunum and ileum to identify these lesions. **Why Other Options are Incorrect:** * **GERD (Option A):** GERD is primarily a clinical diagnosis or evaluated via **Upper GI Endoscopy** (to check for esophagitis/Barrett’s) and **24-hour pH monitoring** (the gold standard). Capsule endoscopy is not the standard of care here. * **Motility Disorders (Option B):** While a capsule can track transit time, motility disorders are best diagnosed using **Manometry** (esophageal or anorectal) or **Gastric emptying studies** (scintigraphy). In fact, severe motility disorders are a relative contraindication for CE due to the risk of capsule retention. **High-Yield Clinical Pearls for NEET-PG:** * **Most common indication:** Obscure GI Bleeding. * **Most common complication:** **Capsule Retention** (especially in patients with known strictures or Crohn’s disease). * **Contraindications:** Intestinal obstruction, strictures, and pregnancy. * **Patency Capsule:** A dissolvable capsule used prior to the actual procedure if a stricture is suspected to ensure the device will pass safely.

Q: Which of the following is NOT seen in carcinoid syndrome?

Constipation. **Explanation:** Carcinoid syndrome is a paraneoplastic syndrome caused by the systemic release of vasoactive substances, primarily **Serotonin (5-HT)**, into the systemic circulation. **Why Constipation is the Correct Answer:** Carcinoid syndrome is characterized by **increased intestinal motility**. Serotonin stimulates the secretory and motor functions of the gut, leading to significant **secretory diarrhea** and abdominal cramping. Therefore, constipation is not a feature of this syndrome; rather, its opposite (diarrhea) is a hallmark symptom. **Analysis of Incorrect Options:** * **Diarrhea (Option A):** This is one of the most common clinical features (seen in >70% of cases) due to serotonin’s effect on the bowel. * **Liver Metastasis (Option C):** Carcinoid syndrome typically occurs only when the tumor has **metastasized to the liver**. In primary midgut tumors, the liver metabolizes bioactive substances (first-pass metabolism). Once liver metastases are present, these substances bypass metabolism and enter the systemic circulation via the hepatic veins. * **5-HT Secretion (Option D):** Serotonin (5-HT) is the primary mediator responsible for the clinical manifestations of the syndrome. Its metabolite, **5-HIAA**, is measured in a 24-hour urine collection for diagnosis. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Flushing (most common), Diarrhea, and Right-sided Valvular Heart Disease (Tricuspid Regurgitation/Pulmonary Stenosis). * **Diagnosis:** Best initial screening test is **24-hour urinary 5-HIAA**. * **Localization:** **Somatostatin Receptor Scintigraphy (OctreoScan)** is the investigation of choice for locating the tumor. * **Management:** **Octreotide** (Somatostatin analogue) is used to control symptoms and manage carcinoid crisis.

Question 1

A 25-year-old man presents with joint pain involving the large joints of his legs, frequently exacerbated, accompanied by diarrhea. Which of the following gastrointestinal diseases is most likely to be implicated as the cause of the patient's joint problems?

Accepted Answer

Ulcerative colitis

Answer

Amebic colitis

Answer

Chronic appendicitis

Answer

Diverticulosis

Question 2

Which of the following is NOT a diagnostic criterion for irritable bowel syndrome?

Accepted Answer

Nocturnal episodes of colicky pain

Answer

Pain improves with defecation

Answer

Onset associated with a change in stool frequency

Answer

Onset associated with a change in stool appearance or form

Question 3

A 35-year-old lady presented with dysphagia, nocturnal asthma, and weight loss for 6 years. What is the most probable diagnosis?

Accepted Answer

Achalasia cardia

Answer

Lye stricture of esophagus

Answer

Gastroesophageal reflux disease

Answer

Cancer esophagus

Question 4

Isolated conjugated hyperbilirubinemia is seen in all of the following conditions except?

Accepted Answer

Gilbert syndrome

Answer

Hemolysis

Answer

Crigler-Najjar syndrome

Answer

Dubin-Johnson syndrome

Question 5

Capsule endoscopy is used for which of the following conditions?

Accepted Answer

Gastrointestinal bleeding

Answer

Gastroesophageal reflux disease (GERD)

Answer

Motility disorder

Answer

None of the above

Question 6

Which of the following management procedures of acute upper gastrointestinal bleed should possibly be avoided?

Accepted Answer

Intravenous vasopressin

Answer

Intravenous b-blockers

Answer

Endoscopic sclerotherapy

Answer

Balloon tamponade

Question 7

A 20-year-old woman presents with a 4-week history of dry mouth, fatigue, fever, and yellow sclerae. Physical examination shows mild jaundice and hepatomegaly. Serum total bilirubin is 3.3 mg/dL. Serologic markers for viral hepatitis are negative. The anti-mitochondrial antibody test is negative. A liver biopsy discloses parenchymal and periportal inflammatory cell infiltrates composed primarily of lymphocytes and plasma cells. The patient's signs and symptoms abate following 2 months of treatment with steroids. Which of the following is the most likely diagnosis?

Accepted Answer

Autoimmune hepatitis

Answer

Extrahepatic jaundice

Answer

Primary biliary cirrhosis

Answer

Primary sclerosing cholangitis

Question 8

Which of the following is NOT seen in carcinoid syndrome?

Accepted Answer

Constipation

Answer

Diarrhea

Answer

Liver metastasis

Answer

5-HT secretion

Question 9

Which of the following statements are true about Budd-Chiari syndrome?

Accepted Answer

Ascites may be present and hepatic vein thrombosis is associated

Answer

Cirrhosis may occur and ascites may be present

Answer

Hepatic vein thrombosis is associated and good prognosis

Question 10

What is the investigation of choice in upper GI bleeding?

Accepted Answer

Endoscopy

Answer

Barium swallow

Answer

X-ray

Answer

Ultrasound

Gastroenterology — MCQs

Gastroenterology — MCQs

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