Gastroenterology — MCQs
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Which is the earliest marker of hepatocellular failure?
A patient with chronic liver disease developed spider naevi dilation on the chest. It may be due to excess of the following hormone:
Which of the following is NOT seen in Crohn's disease?
A 45-year-old man presents with mild difficulty in swallowing and a bitter sensation in the mouth. He has a 5-year history of gastroesophageal reflux disease (GERD) and is compliant with his medications. Endoscopic findings indicate benign pathology. Which of the following findings is most likely?
A 45-year-old chronic alcoholic male with severe ascites presents with a history of passing bright red blood in his stools for the past 3 days. There was no abdominal pain or diarrhea. What would you suspect in this case?
A 30-year-old male patient with cholelithiasis is found to have serum bilirubin 2.5 mg/dL, Hb 6 g/dL, and urine test positive for urobilinogen. What is the most likely diagnosis?
A patient with a known history of ulcerative colitis presents to the emergency department with abdominal distension and tenderness. An abdominal X-ray was performed. Which of the following is true regarding the patient's condition?
Enlarged liver with hepatocellular dysfunction is seen in which of the following conditions?
Yellowish exudates at multiple sites seen in colonoscopy indicates:
What is the investigation of choice for diagnosing Zollinger-Ellison syndrome?
Gastroenterology Indian Medical PG Practice Questions and MCQs
Question 571: Which is the earliest marker of hepatocellular failure?
- A. Abnormal Prothrombin Time (PTT)
- B. Decreased Albumin: Globulin ratio
- C. Increased Prothrombin Time (PT) (Correct Answer)
- D. Increased ammonia
Explanation: The liver is the primary site for the synthesis of most coagulation factors. **Prothrombin Time (PT)** is considered the earliest and most sensitive marker of acute hepatocellular failure [1] due to the **short half-life of Factor VII** (approximately 4–6 hours). Because Factor VII is the first to deplete when the liver's synthetic function is compromised, the PT/INR becomes prolonged rapidly, often within hours of significant hepatic insult [1]. **Analysis of Options:** * **A. Abnormal PTT:** While the Partial Thromboplastin Time (PTT) can be prolonged in liver disease, it reflects the intrinsic pathway. PT (extrinsic pathway) is more sensitive and changes much earlier. * **B. Decreased Albumin: Globulin ratio:** Albumin has a long half-life (approx. 20 days). Therefore, a decrease in albumin levels or a reversal of the A:G ratio is a marker of **chronic** liver disease (e.g., Cirrhosis) rather than acute failure. * **D. Increased Ammonia:** Hyperammonemia occurs due to the liver's inability to convert ammonia to urea. While it is a hallmark of hepatic encephalopathy, it is a metabolic consequence rather than a direct, early measure of synthetic failure. **NEET-PG High-Yield Pearls:** * **Best indicator of prognosis** in acute liver failure: Prothrombin Time (PT) [1]. * **Best indicator of synthetic function** in chronic liver disease: Serum Albumin. * **Factor VIII** is the only coagulation factor not synthesized exclusively by hepatocytes (it is produced by endothelial cells); thus, it remains normal or elevated in pure hepatocellular failure but is low in DIC. * **Vitamin K Trial:** If PT improves after Vitamin K administration, the cause is likely obstructive jaundice (malabsorption); if it does not improve, it indicates primary hepatocellular damage [1].
Question 572: A patient with chronic liver disease developed spider naevi dilation on the chest. It may be due to excess of the following hormone:
- A. Estrogen (Correct Answer)
- B. Testosterone
- C. Aldosterone
- D. Hepatotoxin
Explanation: **Explanation:** **1. Why Estrogen is Correct:** Spider naevi (also known as spider angiomas) are a classic cutaneous manifestation of chronic liver disease (CLD). In a healthy individual, the liver is responsible for the metabolism and clearance of steroid hormones. In patients with cirrhosis or liver failure, the liver's ability to degrade **Estrogen** is significantly impaired [1]. This leads to hyperestrogenemia. Excess estrogen causes **vasodilation** of the cutaneous arterioles. A spider naevus consists of a central arteriole (the "body") with multiple radiating thin-walled capillaries (the "legs"). The high estrogen levels directly affect the vascular smooth muscle, leading to the characteristic permanent dilation seen on the skin, typically in the distribution of the superior vena cava (chest, neck, and face) [1]. **2. Why Other Options are Incorrect:** * **B. Testosterone:** In CLD, testosterone levels actually decrease due to decreased synthesis and increased peripheral conversion to estrogen (aromatization). This leads to feminization (gynecomastia, testicular atrophy) rather than spider naevi. * **C. Aldosterone:** While aldosterone levels are elevated in CLD (secondary hyperaldosteronism) [1], this hormone is responsible for sodium and water retention leading to ascites and edema, not vascular dilation. * **D. Hepatotoxin:** While hepatotoxins (like alcohol) cause the underlying liver damage, they do not directly cause the vascular changes. The spider naevi are a secondary hormonal consequence of the liver's functional decline. **3. NEET-PG High-Yield Pearls:** * **Distribution:** Spider naevi are almost always found above the nipple line (SVC distribution). * **Blanching:** On applying pressure to the central arteriole, the "legs" disappear (blanch) and refill from the center outwards upon release. * **Other Estrogen-related signs in CLD:** Palmar erythema, gynecomastia, and loss of axillary/pubic hair. * **Diagnostic Value:** The presence of more than 5 spider naevi is highly suggestive of underlying cirrhosis [1].
Question 573: Which of the following is NOT seen in Crohn's disease?
- A. ASCA+
- B. Skip lesions
- C. Endomyseal antibodies (Correct Answer)
- D. Cobblestone appearance
Explanation: **Explanation:** The correct answer is **C. Endomyseal antibodies**. Anti-endomyseal antibodies (EMA) are highly specific markers for **Celiac Disease**, not Crohn’s disease [1]. They are directed against tissue transglutaminase (tTG) and are used alongside anti-tTG IgA for the diagnosis of gluten-sensitive enteropathy [1]. **Analysis of Options:** * **A. ASCA+:** Anti-Saccharomyces cerevisiae antibodies (ASCA) are a classic serological marker for **Crohn’s disease** (found in 60-70% of cases). In contrast, p-ANCA is more commonly associated with Ulcerative Colitis. * **B. Skip Lesions:** This is a hallmark pathological feature of Crohn’s disease. Unlike Ulcerative Colitis, which involves continuous inflammation starting from the rectum [2], Crohn’s presents with **discontinuous** areas of inflammation separated by normal-appearing mucosa [2]. * **D. Cobblestone Appearance:** This occurs due to deep, longitudinal, and transverse aphthous ulcers intersecting with islands of edematous, normal mucosa [3]. It is a characteristic endoscopic finding in Crohn’s disease [3]. **NEET-PG High-Yield Pearls:** 1. **Transmural Inflammation:** Crohn’s involves all layers of the bowel wall, leading to complications like fistulae, strictures, and "creeping fat." 2. **Granulomas:** The presence of **non-caseating granulomas** is pathognomonic for Crohn’s (though seen in only ~50% of biopsies). 3. **Site:** The most common site is the **terminal ileum** (ileocolic region) [4]. 4. **String Sign of Kantor:** A classic radiological finding on barium swallow representing terminal ileal narrowing due to spasm or fibrosis [3].
Question 574: A 45-year-old man presents with mild difficulty in swallowing and a bitter sensation in the mouth. He has a 5-year history of gastroesophageal reflux disease (GERD) and is compliant with his medications. Endoscopic findings indicate benign pathology. Which of the following findings is most likely?
- A. Esophageal smooth muscle atrophy
- B. Esophageal strictures (Correct Answer)
- C. Esophageal webs
- D. Intestinal metaplasia
Explanation: **Explanation:** The patient presents with long-standing Gastroesophageal Reflux Disease (GERD) and new-onset dysphagia. In the context of chronic acid reflux, the most common **benign** structural complication leading to difficulty swallowing is the development of **Esophageal Strictures** (Peptic strictures) [1]. 1. **Why Option B is correct:** Chronic exposure of the esophageal mucosa to gastric acid leads to persistent inflammation (esophagitis). Over time, the healing process involves collagen deposition and fibrosis within the submucosa and muscularis propria, resulting in luminal narrowing (stricture). These typically present as progressive dysphagia to solids and, paradoxically, may cause an improvement in heartburn symptoms as the stricture acts as a physical barrier to reflux. Almost all patients who develop peptic strictures have an associated hiatus hernia [1]. 2. **Why other options are incorrect:** * **Option A:** Smooth muscle atrophy is characteristic of **Scleroderma** (Systemic Sclerosis), which causes aperistalsis and a "patulous" lower esophageal sphincter, rather than being a direct consequence of GERD itself. In systemic sclerosis, the muscle of the esophagus is replaced by fibrous tissue [1]. * **Option C:** Esophageal webs are thin mucosal folds usually found in the **upper** esophagus. They are classically associated with **Plummer-Vinson Syndrome** (iron deficiency anemia), not GERD. * **Option D:** Intestinal metaplasia (Barrett’s Esophagus/CLO) is a common complication of GERD, but it is typically **asymptomatic** and does not cause dysphagia unless it progresses to adenocarcinoma or is associated with a stricture [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Peptic strictures are usually located at the squamocolumnar junction (distal esophagus). * **Management:** The gold standard for diagnosis is endoscopy with biopsy (to rule out malignancy). Treatment involves endoscopic balloon dilatation and aggressive Proton Pump Inhibitor (PPI) therapy. * **Schatzki Ring:** A specific type of mucosal ring at the squamocolumnar junction, often associated with hiatal hernia, causing intermittent dysphagia ("Steakhouse Syndrome").
Question 575: A 45-year-old chronic alcoholic male with severe ascites presents with a history of passing bright red blood in his stools for the past 3 days. There was no abdominal pain or diarrhea. What would you suspect in this case?
- A. Intestinal infarction
- B. Chronic ischemic colitis
- C. Hemorrhoids (Correct Answer)
- D. Angiodysplasia
Explanation: The patient is a chronic alcoholic with severe ascites, indicating advanced liver disease and **portal hypertension** [1]. In this clinical context, the most likely cause of painless bright red blood per rectum (hematochezia) is **hemorrhoids** [2]. **Why Hemorrhoids is the Correct Answer:** Portal hypertension leads to the development of portosystemic anastomoses [1]. One such site is the rectum, where the superior rectal vein (portal system) communicates with the middle and inferior rectal veins (systemic system) [1]. While "anorectal varices" are the specific pathological entity associated with portal hypertension, they are clinically indistinguishable from hemorrhoids in presentation [2]. Furthermore, chronic liver disease often leads to increased intra-abdominal pressure (due to ascites) and coagulopathy, both of which significantly increase the risk and severity of bleeding from hemorrhoidal plexuses [2]. **Why Other Options are Incorrect:** * **Intestinal Infarction:** Typically presents with "pain out of proportion to physical findings," systemic shock, and metabolic acidosis. It is an acute surgical emergency, not a chronic painless bleed. * **Chronic Ischemic Colitis:** Usually presents in elderly patients with atherosclerotic disease, characterized by postprandial abdominal pain ("abdominal angina") and bloody diarrhea, rather than isolated painless hematochezia. * **Angiodysplasia:** While it causes painless bleeding in the elderly, it is more commonly associated with chronic kidney disease and aortic stenosis (Heyde’s syndrome) rather than portal hypertension. **Clinical Pearls for NEET-PG:** * **Most common cause of Upper GI bleed in Cirrhosis:** Esophageal Varices. * **Most common cause of Lower GI bleed in Cirrhosis:** Hemorrhoids/Anorectal varices [1]. * **Cruveilhier-Baumgarten Syndrome:** Development of paraumbilical veins (Caput Medusae) due to portal hypertension [1]. * **Rule of thumb:** In any alcoholic with GI bleed, always stabilize the airway and hemodynamic status first before performing endoscopy.
Question 576: A 30-year-old male patient with cholelithiasis is found to have serum bilirubin 2.5 mg/dL, Hb 6 g/dL, and urine test positive for urobilinogen. What is the most likely diagnosis?
- A. Hemolytic jaundice (Correct Answer)
- B. Obstructive jaundice
- C. Hepatocellular jaundice
- D. Erythropoietic Protoporphyria
Explanation: ### Explanation The clinical presentation points toward **Hemolytic Jaundice** based on the triad of anemia, mild hyperbilirubinemia, and increased urinary urobilinogen. **1. Why Hemolytic Jaundice is correct:** * **Anemia:** The low hemoglobin (6 g/dL) indicates significant hemolysis. * **Bilirubin Levels:** In hemolysis, there is an overproduction of unconjugated bilirubin [1]. The liver has a high capacity to conjugate bilirubin, so serum levels typically remain low (usually <5 mg/dL), consistent with this patient's 2.5 mg/dL. * **Urine Urobilinogen:** Increased heme breakdown leads to increased stercobilinogen in the gut, which is reabsorbed and excreted in the urine as **urobilinogen** [1]. Notably, unconjugated bilirubin is water-insoluble, so **urine bilirubin will be absent** (acholuric jaundice) [1]. * **Cholelithiasis:** Chronic hemolysis leads to the formation of **pigment stones** (calcium bilirubinate), explaining the presence of gallstones in a young patient. **2. Why other options are incorrect:** * **Obstructive Jaundice:** Characterized by conjugated hyperbilirubinemia. Because bile cannot reach the gut, **urobilinogen would be absent** in the urine, and urine would be positive for bilirubin (dark urine) [1]. * **Hepatocellular Jaundice:** While urobilinogen can be increased, the profound anemia (6 g/dL) is not a primary feature of hepatitis [1]. * **Erythropoietic Protoporphyria:** This is a rare metabolic disorder presenting with cutaneous photosensitivity [2]. While it can cause gallstones and liver disease, it does not explain the acute combination of severe anemia and urobilinogenuria as classically as hemolysis does. **High-Yield Clinical Pearls for NEET-PG:** * **Acholuric Jaundice:** Jaundice + No bilirubin in urine = Hemolysis [1]. * **Van den Bergh Reaction:** Indirect positive in Hemolytic jaundice; Direct positive in Obstructive jaundice; Biphasic in Hepatocellular jaundice. * **Young patient + Gallstones:** Always screen for Hereditary Spherocytosis or Sickle Cell Anemia (Hemolytic markers).
Question 577: A patient with a known history of ulcerative colitis presents to the emergency department with abdominal distension and tenderness. An abdominal X-ray was performed. Which of the following is true regarding the patient's condition?
- A. Toxic megacolon (Correct Answer)
- B. Toxic megacolon is rarely seen in ulcerative colitis
- C. Sigmoid volvulus
- D. Adhesions
Explanation: ***Toxic megacolon*** - **Abdominal distension** and **tenderness** in a UC patient with **dilated transverse colon >6cm** and **loss of haustra** on X-ray are classic findings of **toxic megacolon**. - This is a **life-threatening complication** of ulcerative colitis requiring immediate medical intervention and possible surgical management. *Toxic megacolon is rarely seen in ulcerative colitis* - This statement is incorrect as **toxic megacolon** is a **well-recognized serious complication** of ulcerative colitis, occurring in 1-9% of patients. - It represents **acute colonic dilatation** with **systemic toxicity** and is considered a **medical emergency** in UC patients. *Sigmoid volvulus* - **Sigmoid volvulus** presents with a characteristic **coffee bean sign** on X-ray, showing twisted sigmoid colon with two air-fluid levels. - The clinical presentation typically involves **sudden onset crampy pain** and **obstipation**, different from the systemic toxicity seen in this UC patient. *Adhesions* - **Intestinal adhesions** cause **mechanical bowel obstruction** with **dilated small bowel loops** and **air-fluid levels** on X-ray. - The history lacks **previous abdominal surgery** or trauma, and adhesions don't typically cause **colonic dilatation** with **loss of haustra** as seen here.
Question 578: Enlarged liver with hepatocellular dysfunction is seen in which of the following conditions?
- A. Wilson's disease
- B. Budd-Chiari syndrome
- C. NASH
- D. All of the above (Correct Answer)
Explanation: The correct answer is **D. All of the above**. This question tests the ability to recognize systemic and localized pathologies that simultaneously cause **hepatomegaly** (enlargement) and **hepatocellular dysfunction** (impaired synthetic or metabolic function). ### **Explanation of Options:** * **Wilson’s Disease (Option A):** This is an autosomal recessive disorder of copper metabolism. In the early stages or during acute presentations (Fulminant Wilson’s), the liver is often enlarged due to copper deposition and inflammation. Hepatocellular dysfunction is a hallmark, manifesting as jaundice, low albumin, and coagulopathy [1]. * **Budd-Chiari Syndrome (Option B):** Caused by hepatic venous outflow obstruction. The resulting severe congestive hepatopathy leads to a large, tender liver (congestive hepatomegaly). The high sinusoidal pressure causes ischemic damage to hepatocytes, leading to acute or chronic liver dysfunction [2]. * **NASH (Non-Alcoholic Steatohepatitis) (Option C):** Part of the NAFLD spectrum, NASH involves fat accumulation plus inflammation. The fatty infiltration causes significant hepatomegaly, while the inflammatory component (steatohepatitis) leads to elevated transaminases and progressive hepatocellular impairment [1]. ### **NEET-PG High-Yield Pearls:** * **Wilson’s Disease Triad:** Liver disease, neuropsychiatric symptoms, and Kayser-Fleischer (KF) rings. Look for **low serum ceruloplasmin** and high urinary copper [1]. * **Budd-Chiari Triad:** Abdominal pain, hepatomegaly, and ascites. The **caudate lobe** is often spared and enlarged (it has independent venous drainage into the IVC) [2]. * **NASH:** Currently the most common cause of incidental hepatomegaly and rising cause of cryptogenic cirrhosis in the West and urban India [1]. * **Differentiating Tip:** While Cirrhosis typically presents with a *shrunken* liver, early-stage Wilson's, NASH, and congestive states like Budd-Chiari are classic causes of *enlarged* dysfunctional livers.
Question 579: Yellowish exudates at multiple sites seen in colonoscopy indicates:
- A. Crohn's disease (Correct Answer)
- B. Hirschsprung disease
- C. Tuberculosis
- D. Lymphoma
Explanation: The presence of **yellowish exudates** at multiple sites during colonoscopy is a characteristic endoscopic finding of **Crohn’s Disease**. These exudates typically represent **aphthous ulcers** or fibrinopurulent material overlying deep, serpiginous ulcers. Crohn's disease is characterized by **transmural inflammation** and **"skip lesions"** [1] (discontinuous involvement), which explains why these exudative patches are seen at multiple, separated sites [1] rather than in a continuous fashion. **Analysis of Options:** * **Crohn’s Disease (Correct):** Beyond yellowish exudates, key endoscopic features include a **"cobblestone appearance"** (due to longitudinal ulcers and edematous mucosa), deep linear ulcers, and strictures. * **Hirschsprung Disease:** This is a functional obstruction caused by the absence of ganglion cells in the distal colon. Endoscopy typically shows a dilated proximal colon and a narrow distal segment, but not exudative ulcers. * **Tuberculosis (Intestinal):** While it can mimic Crohn’s, TB typically presents with **transverse ulcers**, a pulled-up cecum, and an incompetent ileocecal valve. Yellowish exudates are not the defining feature. * **Lymphoma:** Primary intestinal lymphoma usually presents as a bulky mass, a large infiltrating ulcer, or diffuse thickening of the bowel wall, rather than multiple small yellowish exudative spots. **High-Yield Clinical Pearls for NEET-PG:** * **Microscopic Hallmark:** Non-caseating granulomas (seen in ~40-60% of Crohn's cases). * **String Sign of Kantor:** A classic radiological finding in the terminal ileum due to spasm or stricture [1]. * **Creeping Fat:** Mesenteric fat wrapping around the bowel wall is pathognomonic for Crohn’s. * **ASCA vs. p-ANCA:** Crohn’s is associated with **ASCA** (Anti-Saccharomyces cerevisiae antibodies), whereas Ulcerative Colitis is associated with **p-ANCA** [1].
Question 580: What is the investigation of choice for diagnosing Zollinger-Ellison syndrome?
- A. CT scan
- B. Selective angiography
- C. MRI
- D. Endoscopic ultrasound (Correct Answer)
Explanation: **Explanation:** Zollinger-Ellison Syndrome (ZES) is characterized by gastrin-secreting tumors (gastrinomas), typically located in the "gastrinoma triangle." While the initial biochemical diagnosis is made via fasting serum gastrin levels and secretin stimulation tests, **localization** of the tumor is crucial for surgical management. [1] **Why Endoscopic Ultrasound (EUS) is the correct answer:** EUS is currently considered the **investigation of choice for localizing small gastrinomas**, particularly those located in the pancreas. [2] It has a very high sensitivity (75–95%) for detecting lesions as small as 2–5 mm that are often missed by conventional imaging. When combined with Somatostatin Receptor Scintigraphy (SRS/Octreoscan) or Gallium-68 DOTATATE PET/CT, it provides the highest diagnostic yield. **Why other options are incorrect:** * **CT Scan and MRI:** While often the first-line imaging modalities used, they have low sensitivity (approx. 30–50%) for the small, often extrapancreatic (duodenal) tumors characteristic of ZES. [2] * **Selective Angiography:** This is an invasive procedure (e.g., the Secretin Angiography or SASI test). It is reserved for cases where non-invasive imaging fails to localize the tumor despite biochemical confirmation. **High-Yield Clinical Pearls for NEET-PG:** * **Gastrinoma Triangle (Passaro’s Triangle):** Junction of cystic/common bile duct, junction of 2nd and 3rd portions of the duodenum, and the neck/body of the pancreas. 90% of tumors are found here. * **Rule of 2/3rds:** 2/3 are malignant, 2/3 are located in the gastrinoma triangle, and 1/4 are associated with **MEN-1 syndrome**. * **Most common site:** Historically the pancreas, but recent data suggests the **duodenum** is the most common site for primary gastrinomas. * **Screening Test:** Fasting Serum Gastrin (>1000 pg/mL is diagnostic). * **Confirmatory Test:** Secretin Stimulation Test (increase in gastrin >200 pg/mL).
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Esophageal Disorders
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Peptic Ulcer Disease
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Inflammatory Bowel Disease
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Irritable Bowel Syndrome
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Malabsorption Syndromes
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Pancreatitis (Acute and Chronic)
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Gastrointestinal Bleeding
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Liver Diseases and Cirrhosis
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Viral Hepatitis
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Biliary Tract Disorders
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Gastrointestinal Motility Disorders
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Gastrointestinal Malignancies
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