Gastroenterology — MCQs

A 22-year-old woman presents with a 3-day history of dark urine and abdominal distension. On examination, she is alert with icterus and normal heart and lung sounds. Laboratory findings include: Hematocrit: 26%, Reticulocytes: 5%, Platelets: 1.3 lakhs, Alkaline Phosphatase: 30 units/L, ALT: 110 units/L, AST: 220 units/L, Total Bilirubin: 13 mg% (Direct: 4 mg). HBsAg is positive, while Hepatitis A and C are negative. Urine drug screen is negative. Abdominal ultrasound shows a nodular liver and an enlarged spleen. What is the most likely diagnosis?

Q46Medium

What is the first sign of non-cirrhotic portal fibrosis?

Q47Medium

Which type of ulcer is commonly associated with burns and hematemesis?

Q48Medium

Which of the following is NOT a cause of unconjugated hyperbilirubinemia?

Q49Medium

What is the usual maximum dose of furosemide and spironolactone in patients with cirrhosis and portal hypertension?

Q50Medium

Which of the following conditions is characterized by a corkscrew appearance of the esophagus on barium swallow?

Gastroenterology Indian Medical PG Practice Questions and MCQs

Question 41: Which statement is false regarding Crohn's disease?

A. No recurrence after surgery (Correct Answer)
B. Aphthous ulcer
C. Skip lesions
D. Fistula formation

Explanation: The correct answer is **A (No recurrence after surgery)** because this statement is false. Unlike Ulcerative Colitis (UC), which is limited to the colon and can be "cured" by a total proctocolectomy [1], **Crohn’s Disease (CD)** is a chronic, transmural inflammatory condition that can affect any part of the gastrointestinal tract from the mouth to the anus [2]. Surgery in CD is reserved for complications (e.g., strictures, fistulae, or perforation) and is **not curative**. Post-surgical recurrence at the site of anastomosis is extremely common. **Analysis of other options:** * **B. Aphthous ulcers:** These are the earliest macroscopic signs of Crohn’s disease. They often coalesce to form deep, linear "rake-like" ulcers, contributing to the characteristic "cobblestone" appearance. * **C. Skip lesions:** CD is characterized by discontinuous involvement of the bowel, where areas of active disease are separated by segments of normal-appearing mucosa (skip lesions) [2]. * **D. Fistula formation:** Because CD involves **transmural inflammation** (affecting all layers of the bowel wall), it frequently leads to penetrating complications such as sinus tracts, abscesses, and fistulae (entero-enteric, entero-vesical, or perianal). **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Terminal ileum (Ileocolic region). * **Microscopy:** Non-caseating granulomas (pathognomonic but seen in only ~50% of cases). * **Smoking:** A major risk factor that worsens CD (conversely, it appears "protective" in UC). * **Serology:** ASCA (Anti-Saccharomyces cerevisiae antibodies) is positive in CD, whereas p-ANCA is associated with UC. * **Radiology:** "String sign of Kantor" (due to terminal ileum stricture).

Question 42: Which of the following statements are true about Budd-Chiari syndrome?

A. Ascites may be present and hepatic vein thrombosis is associated
B. Cirrhosis may occur and ascites may be present
C. Hepatic vein thrombosis is associated and good prognosis
D. Ascites may be present and hepatic vein thrombosis is associated (Correct Answer)

Explanation: **Explanation:** **Budd-Chiari Syndrome (BCS)** is defined as an obstruction of hepatic venous outflow at any level from the small hepatic veins to the junction of the inferior vena cava (IVC) with the right atrium. **1. Why Option D is Correct:** The pathophysiology involves increased hepatic sinusoidal pressure, leading to post-sinusoidal portal hypertension. This results in the classic clinical triad: **abdominal pain, hepatomegaly, and ascites.** The most common cause of this obstruction is **hepatic vein thrombosis**, often secondary to underlying hypercoagulable states (e.g., Polycythemia Vera, Factor V Leiden mutation) [1]. **2. Analysis of Incorrect Options:** * **Option B:** While cirrhosis can eventually occur (congestive cirrhosis) and ascites is common, this option is less comprehensive than D, which identifies the primary pathological hallmark (thrombosis). * **Option C:** Although hepatic vein thrombosis is the cause, the prognosis is **not** universally "good." Without treatment (anticoagulation, TIPS, or transplant), acute or chronic liver failure develops, leading to high mortality. **3. NEET-PG High-Yield Pearls:** * **Imaging Gold Standard:** Digital Subtraction Angiography (DSA). However, Doppler Ultrasound is the initial screening tool of choice. * **Classic Sign:** **"Spider-web" network** of collateral vessels on venography. * **Caudate Lobe Hypertrophy:** The caudate lobe often enlarges because its venous drainage enters the IVC directly, bypassing the obstructed main hepatic veins. * **Most Common Cause:** In the West, it is thrombosis; in Asia/South Africa, it is often membranous webs in the IVC. * **Nutmeg Liver:** Chronic congestion leads to a mottled macroscopic appearance of the liver.

Question 43: What is the investigation of choice in upper GI bleeding?

A. Barium swallow
B. X-ray
C. Endoscopy (Correct Answer)
D. Ultrasound

Explanation: ### Explanation **Correct Answer: C. Endoscopy** **Why Endoscopy is the Investigation of Choice:** Upper Gastrointestinal (UGI) Endoscopy (Esophagogastroduodenoscopy) is the gold standard for managing UGI bleeding for three primary reasons: 1. **Diagnostic Accuracy:** It allows direct visualization of the mucosa to identify the source of bleeding (e.g., peptic ulcers, varices, or Mallory-Weiss tears) [1] with over 95% sensitivity. 2. **Therapeutic Potential:** It is the only modality that allows for immediate intervention [4]. Clinicians can perform hemostasis using clips, thermal cautery, or injection therapy (e.g., adrenaline or sclerosants) [2]. 3. **Prognostic Value:** It enables the use of the **Forrest Classification** to assess the risk of re-bleeding and guide further management. **Why Other Options are Incorrect:** * **A. Barium Swallow:** This is contraindicated in acute UGI bleeding. Barium can obscure the field for subsequent endoscopy or surgery and carries a risk of aspiration. It also cannot detect superficial mucosal lesions like erosions. * **B. X-ray:** Plain radiographs (Chest/Abdomen) are useful only to rule out complications like perforation (pneumoperitoneum) but cannot identify the source of intraluminal bleeding. * **D. Ultrasound:** USG is ineffective for visualizing the hollow viscera of the GI tract due to bowel gas interference and lacks the sensitivity to detect mucosal bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** Early endoscopy should be performed within **24 hours** of presentation after hemodynamic stabilization. * **First Step in Management:** The initial step in any patient with UGI bleed is always **hemodynamic stabilization** (ABC: Airway, Breathing, and Fluid Resuscitation), not the investigation [1]. * **Rockall and Glasgow-Blatchford Scores:** These are high-yield scoring systems used to risk-stratify patients with UGI bleeding [3]. * **Nasogastric (NG) Lavage:** While sometimes used to confirm a UGI source, a negative aspirate does not rule out a post-pyloric bleed.

Question 44: What is the most common cause of gastric varices?

A. Splenic vein thrombosis
B. Splenectomy
C. Cirrhosis (Correct Answer)
D. Mesenteric thrombosis

Explanation: **Explanation:** **1. Why Cirrhosis is the Correct Answer:** While gastric varices are often associated with splenic vein thrombosis, **Cirrhosis** is the most common cause overall [1]. In cirrhosis, portal hypertension (defined as a portal venous pressure gradient >5 mmHg) leads to the development of collateral circulation to bypass the liver [1]. These collaterals manifest as esophageal and gastric varices [1]. Gastric varices occur in approximately 20% of patients with cirrhosis, usually as an extension of esophageal varices (Gastro-esophageal varices or GOV). **2. Analysis of Incorrect Options:** * **Splenic Vein Thrombosis (SVT):** This is the most common cause of **isolated** gastric varices (IGV). It leads to "left-sided" or "sinusoidal" portal hypertension. While a classic textbook association, it is statistically less frequent than cirrhosis in the general population. * **Splenectomy:** This is actually a *treatment* for isolated gastric varices caused by splenic vein thrombosis, not a cause of varices. * **Mesenteric Thrombosis:** This typically leads to bowel ischemia or congestion but does not primarily manifest as gastric varices. **3. NEET-PG High-Yield Pearls:** * **Classification:** Gastric varices are classified by the **Sarin Classification**. GOV1 (extension along the lesser curvature) is the most common type. * **Management:** For acute bleeding from gastric varices, **Endoscopic Cyanoacrylate injection** (glue) is the treatment of choice, unlike esophageal varices where band ligation is preferred [1]. * **Isolated Gastric Varices (IGV):** If you see varices in the fundus *without* esophageal varices, always suspect **Splenic Vein Thrombosis** (often secondary to chronic pancreatitis).

Question 45: A 22-year-old woman presents with a 3-day history of dark urine and abdominal distension. On examination, she is alert with icterus and normal heart and lung sounds. Laboratory findings include: Hematocrit: 26%, Reticulocytes: 5%, Platelets: 1.3 lakhs, Alkaline Phosphatase: 30 units/L, ALT: 110 units/L, AST: 220 units/L, Total Bilirubin: 13 mg% (Direct: 4 mg). HBsAg is positive, while Hepatitis A and C are negative. Urine drug screen is negative. Abdominal ultrasound shows a nodular liver and an enlarged spleen. What is the most likely diagnosis?

A. Acetaminophen intoxication
B. Acute viral hepatitis
C. Primary biliary cirrhosis
D. Wilson disease (Correct Answer)

Explanation: ### Explanation The correct diagnosis is **Wilson disease (WD)** presenting as **Fulminant Hepatic Failure (FHF)**. This is a classic "high-yield" presentation for NEET-PG. **Why Wilson Disease is the correct answer:** While the patient is HBsAg positive, the laboratory profile is pathognomonic for Wilsonian FHF rather than acute viral hepatitis: 1. **Low Alkaline Phosphatase (ALP):** An ALP < 40 U/L or an **ALP/Total Bilirubin ratio < 4** is highly specific for Wilson disease. 2. **Coombs-negative Hemolytic Anemia:** The low hematocrit (26%) and high reticulocyte count (5%) indicate hemolysis caused by the sudden release of free copper into the bloodstream, which damages RBC membranes [1]. 3. **AST > ALT:** In WD, the AST:ALT ratio is typically > 2:1, unlike viral hepatitis where ALT is usually higher. 4. **Underlying Cirrhosis:** The nodular liver and splenomegaly on ultrasound suggest chronic liver disease, which is common in WD patients presenting with acute decompensation [1]. **Why other options are incorrect:** * **Acetaminophen intoxication:** Usually presents with extremely high transaminases (often >3,000 U/L) and a high ALP/Bilirubin ratio [3]. * **Acute viral hepatitis:** While HBsAg is positive, the very low ALP and the presence of hemolytic anemia/cirrhotic morphology point away from a simple acute viral infection [1], [3]. * **Primary biliary cirrhosis (PBC):** Typically presents with a significantly **elevated** ALP and is rare in a 22-year-old [2]. **Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Liver biopsy (increased copper content >250 μg/g dry weight). * **Screening Test:** Low Serum Ceruloplasmin (<20 mg/dL). * **Ocular Sign:** Kayser-Fleischer (KF) rings in the Descemet membrane (seen in 99% of neurological WD but only ~50-60% of hepatic WD). * **Treatment of Choice:** Chelating agents like **D-Penicillamine** or Trientine; Zinc for maintenance. For FHF, liver transplantation is the only definitive treatment [1].

Question 46: What is the first sign of non-cirrhotic portal fibrosis?

A. Upper GI bleeding (Correct Answer)
B. Ascites
C. Splenomegaly
D. Jaundice

Explanation: **Non-Cirrhotic Portal Fibrosis (NCPF)**, also known as Idiopathic Portal Hypertension (IPH), is a clinical syndrome characterized by portal hypertension in the absence of cirrhosis, extrahepatic portal vein obstruction, or Budd-Chiari syndrome [1]. **Why Upper GI Bleeding is the first sign:** In NCPF, the primary pathology involves obliterative venopathy of the small portal vein branches, leading to increased portal pressure. Unlike cirrhosis, **liver synthetic function remains preserved** for a long time. Therefore, the disease remains asymptomatic until the portal hypertension becomes severe enough to cause esophageal varices [1]. **Upper GI bleeding (hematemesis)** is typically the first clinical presentation in over 70-80% of cases. **Why other options are incorrect:** * **Splenomegaly (Option C):** While splenomegaly is almost always present at the time of diagnosis, it is usually an incidental finding or discovered during the evaluation of the initial bleed. Patients rarely seek medical attention for an enlarged spleen alone. * **Ascites (Option B):** Ascites is rare in NCPF because hepatic synthetic function (albumin production) is maintained [1]. If it occurs, it is usually transient and follows a massive variceal bleed. * **Jaundice (Option D):** Jaundice is a sign of hepatocellular failure. Since the liver parenchyma is healthy in NCPF, jaundice is not a feature of this condition. **NEET-PG High-Yield Pearls:** * **Classic Triad:** Massive splenomegaly, preserved liver function, and variceal bleeding. * **Histology:** Shows "obliterative portal venopathy" and portal fibrosis, but **no nodules** (distinguishing it from cirrhosis). * **Prognosis:** Much better than cirrhosis because the liver is "bystander" to the vascular pathology. * **Common Association:** Chronic exposure to arsenic or recurrent umbilical sepsis in neonates.

Question 47: Which type of ulcer is commonly associated with burns and hematemesis?

A. Cushing ulcer
B. Curling ulcer (Correct Answer)
C. Malignant ulcer
D. Intracranial tumor

Explanation: **Explanation:** **Curling Ulcers** are acute gastric erosion/ulcers that occur as a complication of **severe burns**. The underlying pathophysiology involves systemic hypovolemia and hypotension following a major burn, which leads to reduced mucosal blood flow (ischemia). This ischemia compromises the protective mucosal barrier, allowing gastric acid to cause acute ulceration, often presenting with **hematemesis** (coffee-ground emesis) or melena. **Analysis of Options:** * **Curling Ulcer (Correct):** Classically associated with burns. *Mnemonic: "Curling" sounds like "Curling iron," which causes burns.* * **Cushing Ulcer (Incorrect):** These are stress ulcers associated with **increased intracranial pressure** (e.g., tumors, trauma, or surgery). They are caused by overstimulation of the vagus nerve, leading to excessive gastric acid secretion. *Mnemonic: "Cushing" is for "Cushioning the brain."* * **Malignant Ulcer (Incorrect):** These are cancerous lesions (e.g., Gastric Adenocarcinoma) characterized by heaped-up, irregular margins. They are not acutely triggered by burns. * **Intracranial Tumor (Incorrect):** This is a clinical condition that leads to a Cushing ulcer, not the name of the ulcer itself. **High-Yield NEET-PG Pearls:** 1. **Location:** Curling ulcers are most commonly found in the **fundus and body** of the stomach, but can occur in the duodenum. 2. **Prophylaxis:** In clinical practice, patients with severe burns or ICU stress are started on **Proton Pump Inhibitors (PPIs)** or H2 blockers to prevent these stress-induced ulcers. 3. **Cameron Ulcers:** These are linear erosions found in a large hiatal hernia (another common PG exam distractor).

Question 48: Which of the following is NOT a cause of unconjugated hyperbilirubinemia?

A. Hemolytic anemia
B. Large hematoma
C. Rotor syndrome (Correct Answer)
D. Megaloblastic anemia

Explanation: ### Explanation The correct answer is **Rotor syndrome**. To answer this question, one must distinguish between pre-hepatic, hepatic, and post-hepatic causes of jaundice based on the type of bilirubin that accumulates [2]. **1. Why Rotor Syndrome is the Correct Answer:** Rotor syndrome is an autosomal recessive condition characterized by **conjugated hyperbilirubinemia**. It results from a defect in the hepatic storage capacity of bilirubin and a deficiency in the organic anion transporting polypeptides (OATP1B1 and OATP1B3), which are responsible for the re-uptake of conjugated bilirubin into hepatocytes. Unlike unconjugated causes, the liver successfully conjugates the bilirubin, but it leaks back into the blood [3]. **2. Analysis of Incorrect Options (Causes of Unconjugated Hyperbilirubinemia):** * **Hemolytic Anemia:** Excessive breakdown of RBCs leads to an overproduction of heme, overwhelming the liver's conjugation capacity [2], [3]. * **Large Hematoma:** As a large collection of blood resolves, the breakdown of hemoglobin releases massive amounts of unconjugated bilirubin into the circulation. * **Megaloblastic Anemia:** This causes **ineffective erythropoiesis**, where RBC precursors are destroyed within the bone marrow (intramedullary hemolysis), releasing unconjugated bilirubin. **3. High-Yield Clinical Pearls for NEET-PG:** * **Unconjugated Hyperbilirubinemia:** Think of Overproduction (Hemolysis), Impaired Uptake (Drugs like Rifampicin), or Impaired Conjugation (Gilbert’s and Crigler-Najjar syndromes) [1], [3]. * **Conjugated Hyperbilirubinemia:** Think of Dubin-Johnson and Rotor syndromes (asymptomatic) or Biliary Obstruction [3], [4]. * **Differentiating Dubin-Johnson vs. Rotor:** * **Dubin-Johnson:** Black liver (melanin-like pigment), normal total urinary coproporphyrin but >80% is Coproporphyrin I. * **Rotor:** Normal color liver, high total urinary coproporphyrin (<80% is Coproporphyrin I).

Question 49: What is the usual maximum dose of furosemide and spironolactone in patients with cirrhosis and portal hypertension?

A. Furosemide 160 mg and spironolactone 400 mg (Correct Answer)
B. Furosemide 80 mg and spironolactone 400 mg
C. Furosemide 160 mg and spironolactone 200 mg
D. Furosemide 80 mg and spironolactone 200 mg

Explanation: In patients with cirrhosis and portal hypertension, ascites develops due to secondary hyperaldosteronism and sodium retention. The standard medical management involves a combination of **Spironolactone** (an aldosterone antagonist) and **Furosemide** (a loop diuretic). **1. Why Option A is Correct:** The goal of therapy is to maintain a **100:40 ratio** of Spironolactone to Furosemide. This specific ratio is clinically proven to maintain normokalemia by balancing the potassium-sparing effect of spironolactone with the potassium-wasting effect of furosemide. * **Starting Dose:** 100 mg Spironolactone and 40 mg Furosemide. * **Maximum Dose:** The doses are titrated every 3–5 days if weight loss is inadequate, up to a maximum of **400 mg Spironolactone and 160 mg Furosemide**. **2. Why Other Options are Incorrect:** * **Options B & C:** These violate the established 100:40 ratio. Using disproportionate doses increases the risk of electrolyte imbalances (hyperkalemia if spironolactone is too high, or hypokalemia if furosemide is too high). * **Option D:** While 200 mg/80 mg is a common intermediate step in titration, it is not the "maximum" dose defined by clinical guidelines (AASLD/EASL). **Clinical Pearls for NEET-PG:** * **Weight Loss Goal:** Aim for 0.5 kg/day in patients without edema and 1.0 kg/day in those with peripheral edema. * **Side Effect:** Gynecomastia is a common side effect of spironolactone; if it occurs, it can be switched to **Amiloride**. * **Refractory Ascites:** Defined when ascites cannot be mobilized despite the maximum doses (400mg/160mg) or when diuretic-induced complications (e.g., encephalopathy, creatinine >2.0 mg/dL) occur. Note: Although references discuss portal hypertension and sodium retention [1][2], they do not explicitly define the 400mg/160mg dosage maximum in the provided snippets.

Question 50: Which of the following conditions is characterized by a corkscrew appearance of the esophagus on barium swallow?

A. Achalasia cardia
B. Cancer esophagus
C. Schatzki ring
D. Diffuse esophageal spasm (DES) (Correct Answer)

Explanation: ### Explanation **Correct Answer: D. Diffuse esophageal spasm (DES)** **Medical Concept:** Diffuse Esophageal Spasm (DES) is a motility disorder characterized by uncoordinated, non-peristaltic tertiary contractions of the esophageal smooth muscle. On a barium swallow, these simultaneous, high-amplitude contractions compartmentalize the esophagus, creating multiple indentations that resemble a **"corkscrew"** or **"rosary bead"** appearance. Clinically, patients present with intermittent chest pain (mimicking angina) and dysphagia to both solids and liquids. **Analysis of Incorrect Options:** * **A. Achalasia Cardia:** Characterized by a failure of the Lower Esophageal Sphincter (LES) to relax and absent peristalsis [2]. The classic barium swallow finding is a **"Bird’s beak"** or "Rat-tail" appearance due to distal narrowing and proximal dilatation [2]. * **B. Cancer Esophagus:** Typically presents with an **"Irregular apple-core"** appearance or a ragged mucosal contour due to an infiltrating mass or malignant stricture. * **C. Schatzki Ring:** A smooth, mucosal ring located at the squamocolumnar junction (distal esophagus). It appears as a **transverse thin shelf-like constriction** or "Steakhouse syndrome" when causing acute bolus obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Esophageal **Manometry** is the most sensitive test for DES, showing high-amplitude, simultaneous contractions (>20% of swallows) [3]. * **Treatment:** First-line management includes Calcium Channel Blockers (CCBs), nitrates, or Tricyclic Antidepressants (TCAs) to relax smooth muscle [1]. * **Nutcracker Esophagus:** Often confused with DES; it involves high-pressure *peristaltic* waves (hypertensive peristalsis) rather than uncoordinated ones [1]. * **Key Association:** DES is often triggered by very cold or very hot liquids.

Practice by Chapter

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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