Gastroenterology — MCQs

A 60-year-old male presents with progressive difficulty in swallowing, vomiting, and occasional regurgitation for the past 3 months. Barium studies showed marked dilatation of the upper esophagus with narrowing of the lower segment. Manometry showed absent esophageal peristalsis. What is the required management for this patient?

Q886Medium

Among the following, which is the least common cause of acute upper gastrointestinal bleeding?

Q887Medium

What is the most common cause of fulminant hepatic failure?

Q888Easy

Cobblestone appearance seen on colonoscopy is characteristic of which of the following diseases?

Q889Easy

What is the first step to be done in case of variceal bleeding?

Q890Easy

Distal colitis, with respect to ulcerative colitis, refers to which of the following presentations?

Gastroenterology Indian Medical PG Practice Questions and MCQs

Question 881: A patient who has undergone partial gastrectomy presents with neurological symptoms. What is the most probable diagnosis?

A. Folic acid deficiency
B. Thiamine deficiency
C. Vitamin B12 deficiency (Correct Answer)
D. Iron deficiency

Explanation: ### Explanation **Correct Option: C. Vitamin B12 deficiency** **Mechanism:** Vitamin B12 (cobalamin) absorption is a complex process requiring **Intrinsic Factor (IF)**, which is secreted by the **parietal cells** located in the fundus and body of the stomach. In a partial gastrectomy, the reduction in gastric mucosal surface area leads to a significant decrease in IF production. Furthermore, the loss of gastric acidity (hypochlorhydria) prevents the cleavage of B12 from dietary proteins. Without IF, B12 cannot be absorbed in the terminal ileum, leading to deficiency. The liver stores enough vitamin B₁₂ for 3 years, meaning deficiency takes years to become manifest [1]. Neurologically, this manifests as **Subacute Combined Degeneration of the Spinal Cord (SCD)**, characterized by the loss of vibration/position sense (posterior columns) and spasticity (lateral corticospinal tracts). **Analysis of Incorrect Options:** * **A. Folic acid deficiency:** While it causes megaloblastic anemia, it **does not** cause neurological symptoms. It is primarily absorbed in the jejunum and is less affected by gastric resection. * **B. Thiamine (B1) deficiency:** While it causes neurological issues (Wernicke-Korsakoff syndrome), it is typically associated with chronic alcoholism or persistent vomiting [2], not specifically with the loss of intrinsic factor post-gastrectomy. * **D. Iron deficiency:** This is the **most common** nutritional deficiency after gastrectomy (due to loss of gastric acid which converts ferric iron to the absorbable ferrous form), but it presents with microcytic anemia and pica, not neurological deficits. **NEET-PG High-Yield Pearls:** * **Site of IF secretion:** Parietal cells (Stomach). * **Site of B12 absorption:** Terminal Ileum (requires Calcium). * **Earliest neurological sign:** Loss of vibration and position sense. * **Schilling Test:** Historically used to differentiate causes of B12 malabsorption. * **Post-gastrectomy monitoring:** Patients require lifelong prophylactic Vitamin B12 injections (parenteral) because oral supplementation is often ineffective due to the lack of IF.

Question 882: Which of the following conditions is NOT associated with an increased risk of squamous cell carcinoma of the esophagus?

A. Barrett's Esophagus (Correct Answer)
B. Achalasia cardia
C. Smoking
D. Tylosis

Explanation: **Explanation:** The correct answer is **Barrett’s Esophagus**. This is because Barrett’s esophagus is the primary precursor lesion for **Adenocarcinoma** of the esophagus, not Squamous Cell Carcinoma (SCC). Barrett’s involves intestinal metaplasia (replacement of squamous epithelium with columnar epithelium) due to chronic GERD, typically affecting the distal third of the esophagus. **Analysis of Options:** * **Achalasia Cardia:** Chronic stasis of food leads to esophagitis and mucosal irritation, increasing the risk of SCC (usually after 15–20 years of disease). * **Smoking:** Tobacco use is a major synergistic risk factor (along with alcohol) for SCC, as carcinogens directly damage the squamous lining. * **Tylosis (Howel-Evans Syndrome):** An autosomal dominant condition characterized by hyperkeratosis of palms and soles; it carries a nearly 100% lifetime risk of developing esophageal SCC. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** SCC typically involves the **upper and middle thirds** of the esophagus, whereas Adenocarcinoma involves the **lower third**. * **Plummer-Vinson Syndrome:** Characterized by iron deficiency anemia, esophageal webs, and glossitis; it is a significant risk factor for SCC. * **Corrosive Injury:** History of lye ingestion increases SCC risk significantly. * **Dietary Factors:** Deficiencies in Vitamin A, C, and Zinc, as well as the consumption of very hot beverages and nitrosamines, are linked to SCC. * **Global Trend:** While SCC remains the most common type worldwide, Adenocarcinoma is rapidly increasing in Western countries due to rising obesity and GERD rates.

Question 883: Which of the following is NOT a feature of achalasia cardia?

A. Regurgitant vomiting
B. Elongated and dilated esophagus
C. Rat-tail deformity and filling defect on barium study (Correct Answer)
D. Increased difficulty in swallowing

Explanation: Achalasia cardia is a primary esophageal motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax and the absence of esophageal peristalsis [1]. **Why Option C is the correct answer (The "Not" feature):** The classic barium swallow finding in achalasia [1] is a smooth, symmetric tapering of the distal esophagus, known as the **"Bird’s beak"** or **"Beak-like"** appearance. * **Rat-tail deformity** and an irregular **filling defect** are hallmark signs of **Esophageal Carcinoma** (Pseudoachalasia). In malignancy, the narrowing is irregular and eccentric due to the tumor mass, unlike the smooth tapering seen in functional achalasia. **Analysis of other options:** * **Option A (Regurgitant vomiting):** Common in achalasia [1]. Since food cannot pass the LES, it stasis in the esophagus and is eventually regurgitated (often undigested and non-bilious). * **Option B (Elongated and dilated esophagus):** Chronic obstruction leads to proximal dilatation [1]. In advanced stages, the esophagus becomes massively dilated and tortuous, referred to as a **"Sigmoid esophagus." * **Option D (Increased difficulty in swallowing):** Dysphagia is the most common presenting symptom [1]. Uniquely, in achalasia, dysphagia occurs for **both solids and liquids** from the onset. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis) [1]. * **Heller’s Myotomy:** The surgical treatment of choice (often combined with a partial fundoplication). * **Chagas Disease:** A common secondary cause of achalasia (caused by *Trypanosoma cruzi*). * **Histo-pathology:** Loss of ganglion cells in the **Auerbach’s (myenteric) plexus** [1].

Question 884: What is the most common cause of Budd-Chiari syndrome?

A. Idiopathic
B. Valves in hepatic veins
C. Hepatocellular carcinoma
D. Thrombosis of hepatic veins (Correct Answer)

Explanation: **Explanation:** **Budd-Chiari Syndrome (BCS)** is defined as the 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. **Why Option D is Correct:** The most common underlying mechanism for Budd-Chiari syndrome is **thrombosis of the hepatic veins** [1]. In modern clinical practice, over 75% of patients have an underlying hypercoagulable state. The most frequent specific cause is **Polycythemia Vera** (a myeloproliferative neoplasm), followed by other conditions like Factor V Leiden mutation, Protein C/S deficiency, and Paroxysmal Nocturnal Hemoglobinuria (PNH). **Analysis of Incorrect Options:** * **Option A (Idiopathic):** While many cases were historically labeled idiopathic, advanced hematological testing now identifies an underlying prothrombotic cause in the vast majority of patients. * **Option B (Valves/Webs):** Membranous webs or "valves" in the IVC are a common cause of BCS in specific geographic regions like South Africa and parts of Asia (Nepal/India), but globally, thrombosis remains more prevalent. * **Option C (Hepatocellular Carcinoma):** While HCC can cause BCS via direct tumor invasion or compression of the hepatic veins, it is a secondary cause and less common than primary venous thrombosis. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Abdominal pain, ascites, and hepatomegaly [2]. * **Imaging Gold Standard:** Doppler Ultrasound is the initial test of choice (shows "spiderweb" collaterals). Hepatic venography is the definitive gold standard. * **Biopsy Finding:** Centrilobular congestion and necrosis (Nutmeg liver). * **Association:** BCS is the most common cause of post-sinusoidal portal hypertension.

Question 885: A 60-year-old male presents with progressive difficulty in swallowing, vomiting, and occasional regurgitation for the past 3 months. Barium studies showed marked dilatation of the upper esophagus with narrowing of the lower segment. Manometry showed absent esophageal peristalsis. What is the required management for this patient?

A. Balloon dilatation (Correct Answer)
B. Endoscopic banding
C. Sclerotherapy
D. Proton pump inhibitor

Explanation: ### Explanation **Diagnosis: Achalasia Cardia** The clinical presentation of progressive dysphagia, regurgitation, and the classic "Bird’s beak" appearance on Barium swallow (dilated upper esophagus with distal narrowing) combined with the gold-standard manometric finding of **absent peristalsis** and failure of Lower Esophageal Sphincter (LES) relaxation confirms a diagnosis of Achalasia Cardia [1]. **Why Option A is Correct:** The primary goal of treatment in Achalasia is to reduce the resting pressure of the LES to allow gravity-assisted passage of food. **Pneumatic (Balloon) Dilatation** is the most effective non-surgical treatment. It involves using a large-diameter balloon to forcefully disrupt the muscular fibers of the LES. It provides long-term symptomatic relief in 70-90% of patients. **Why Other Options are Incorrect:** * **B & C (Endoscopic Banding/Sclerotherapy):** These are treatments for **Esophageal Varices** (complications of portal hypertension). They have no role in treating motility disorders like Achalasia. * **D (Proton Pump Inhibitors):** PPIs are used for GERD [1]. In Achalasia, the LES pressure is already high; PPIs do not address the underlying motility defect or the mechanical obstruction. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis) [1]. * **Barium Swallow Sign:** "Bird’s Beak" or "Rat-tail" appearance. * **Surgical Gold Standard:** Heller’s Myotomy (usually performed with a partial fundoplication to prevent reflux). * **Pharmacotherapy:** Nitrates or Calcium Channel Blockers (Nifedipine) can be used as temporizing measures in patients unfit for surgery/dilatation [1]. * **Botulinum Toxin:** Injected into the LES; reserved for elderly patients who cannot tolerate more invasive procedures.

Question 886: Among the following, which is the least common cause of acute upper gastrointestinal bleeding?

A. Mallory Weiss tear
B. Ulcer
C. Varices
D. Vascular ectasia (Correct Answer)

Explanation: **Explanation:** Acute upper gastrointestinal bleeding (UGIB) is a common medical emergency. To answer this question, one must distinguish between common causes and rare vascular pathologies [1]. **Why Vascular Ectasia is the Correct Answer:** Vascular ectasias (such as Gastric Antral Vascular Ectasia or GAVE, also known as "Watermelon Stomach") are dilated small vessels in the mucosa. While they are significant causes of **chronic, occult blood loss** and iron deficiency anemia, they are statistically the **least common** cause of massive acute UGIB among the options provided. They account for less than 1% of acute UGIB cases. **Analysis of Incorrect Options:** * **Peptic Ulcer (B):** This is the **most common** cause of acute UGIB worldwide (accounting for ~50% of cases) [1]. * **Varices (C):** Esophageal and gastric varices are the second or third most common cause, especially in patients with portal hypertension/cirrhosis [1]. They often present with the most severe, life-threatening bleeding. * **Mallory-Weiss Tear (A):** These longitudinal mucosal lacerations at the gastroesophageal junction (often post-vomiting) are a frequent cause of acute UGIB, accounting for roughly 5–10% of cases [1]. **NEET-PG High-Yield Pearls:** * **Most common cause of UGIB:** Peptic Ulcer Disease (Duodenal > Gastric). * **Dieulafoy’s Lesion:** A rare but important cause where a large submucosal artery bleeds through a tiny mucosal defect. * **Rockall Score & Glasgow-Blatchford Score:** Used to predict mortality and the need for intervention in UGIB [1]. * **GAVE (Watermelon Stomach):** Classically associated with Systemic Sclerosis (Scleroderma) and Cirrhosis.

Question 887: What is the most common cause of fulminant hepatic failure?

A. Hepatitis A virus (HAV)
B. Hepatitis B virus (HBV)
C. Hepatitis C virus (HCV)
D. Hepatitis D virus (HDV) (Correct Answer)

Explanation: **Explanation:** Fulminant Hepatic Failure (FHF) is defined as the rapid onset of hepatic encephalopathy and coagulopathy within 8 weeks of the onset of jaundice in a patient without pre-existing liver disease [1]. **Why Hepatitis D (Delta virus) is the correct answer:** While Hepatitis B (HBV) is the most common viral cause of FHF globally, **Hepatitis D (Delta virus)** carries the highest risk of progression to fulminant failure among all viral hepatitides [2]. Specifically, **superinfection** of HDV in a chronic HBV carrier leads to FHF in approximately 20% of cases, making it the most potent viral trigger for acute liver collapse. In the context of competitive exams like NEET-PG, when asked for the "most common cause" among viral options, HDV is prioritized due to its high virulence and propensity for fulminant outcomes. **Analysis of Incorrect Options:** * **Hepatitis A (HAV):** While common, it rarely causes FHF (<1% of cases), typically seen only in older adults or those with underlying liver disease [2]. * **Hepatitis B (HBV):** Globally, HBV is the most frequent cause of viral FHF in absolute numbers, but the *rate* of fulminant progression is lower (approx. 1%) compared to HDV. * **Hepatitis C (HCV):** HCV is a leading cause of chronic liver disease but is **extremely rare** as a cause of acute fulminant hepatic failure [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Pregnancy:** Hepatitis E (HEV) is the most common cause of FHF in pregnant women (high mortality rate ~20%). * **Drug-induced:** Globally, **Acetaminophen (Paracetamol)** toxicity is the #1 cause of FHF [1]. * **Wilson’s Disease:** Should be suspected in young patients presenting with FHF, Coombs-negative hemolytic anemia, and low alkaline phosphatase.

Question 888: Cobblestone appearance seen on colonoscopy is characteristic of which of the following diseases?

A. Crohn's disease (Correct Answer)
B. Ulcerative colitis
C. TB colitis
D. Irritable bowel syndrome

Explanation: **Explanation:** **1. Why Crohn’s Disease is Correct:** The "cobblestone appearance" is a classic endoscopic hallmark of **Crohn’s disease**. This occurs due to the presence of **deep, longitudinal, and transverse aphthous ulcers** that intersect with areas of relatively normal, edematous mucosa. Because Crohn’s is a **transmural** inflammatory process, the swelling of the submucosa alongside these deep fissures creates a bumpy, irregular surface resembling a cobblestone street. [1] **2. Why Other Options are Incorrect:** * **Ulcerative Colitis (UC):** UC involves continuous, superficial inflammation starting from the rectum. [1] Instead of cobblestoning, it typically shows a **"lead pipe"** appearance on imaging (due to loss of haustra) and a **pseudopolyposis** or granular, friable mucosa on endoscopy. [1] * **TB Colitis:** While it can mimic Crohn’s, TB colitis more commonly presents with **transverse ulcers** (rather than longitudinal), a patulous ileocecal valve, and a "conical cecum." * **Irritable Bowel Syndrome (IBS):** IBS is a functional bowel disorder. By definition, the colonoscopy and biopsy results are **grossly normal**, with no structural or inflammatory changes. **3. Clinical Pearls for NEET-PG:** * **Skip Lesions:** Crohn’s is characterized by discontinuous involvement (skip lesions), whereas UC is continuous. [1] * **Histology:** Look for **non-caseating granulomas** in Crohn’s (pathognomonic but only seen in ~30% of cases). * **String Sign of Kantor:** A high-yield radiological finding in Crohn’s disease due to terminal ileal narrowing. * **Creeping Fat:** Mesenteric fat wrapping around the bowel is a classic surgical finding in Crohn’s.

Question 889: What is the first step to be done in case of variceal bleeding?

A. Blood transfusion
B. IV Crystalloids (Correct Answer)
C. Endoscopy
D. Somatostatin

Explanation: **Explanation:** In the management of acute variceal bleeding, the immediate priority follows the standard **ABC (Airway, Breathing, Circulation)** protocol of resuscitation [1]. 1. **Why IV Crystalloids are the first step:** Variceal hemorrhage often leads to rapid hypovolemic shock. The primary goal is to restore intravascular volume and maintain hemodynamic stability. Establishing wide-bore IV access and initiating **IV Crystalloids (Normal Saline or Ringer’s Lactate)** is the most immediate action to prevent organ malperfusion before specialized interventions can begin [1]. 2. **Analysis of Incorrect Options:** * **Blood Transfusion:** While essential, it is not the *first* step. It is indicated if the hemoglobin drops below 7–8 g/dL. Over-transfusion should be avoided as it increases portal pressure, which can worsen bleeding. * **Somatostatin/Octreotide:** These are the drugs of choice for pharmacological management (reducing portal pressure), but they are administered *after* initial hemodynamic stabilization [2]. * **Endoscopy:** This is the definitive diagnostic and therapeutic step (e.g., Variceal Band Ligation). However, it should only be performed once the patient is hemodynamically stable or adequately resuscitated [1],[2]. **High-Yield Clinical Pearls for NEET-PG:** * **Target Hemoglobin:** In cirrhotic patients with variceal bleed, a **restrictive transfusion strategy** (target Hb 7–9 g/dL) is preferred over a liberal one to prevent rebound portal hypertension. * **Prophylactic Antibiotics:** Ceftriaxone is the standard of care to prevent spontaneous bacterial peritonitis (SBP) and improve survival. * **Vasoactive Drugs:** Terlipressin is the only drug shown to improve survival in acute variceal bleeding [2]. * **Definitive Management:** Endoscopic Variceal Ligation (EVL) is preferred over sclerotherapy [2].

Question 890: Distal colitis, with respect to ulcerative colitis, refers to which of the following presentations?

A. Proctitis
B. Involvement limited to the colon distal to the splenic flexure (Correct Answer)
C. Mid transverse colitis
D. None of the above

Explanation: **Explanation:** Ulcerative Colitis (UC) is characterized by continuous mucosal inflammation that starts in the rectum and extends proximally [1]. The classification of UC is based on the anatomical extent of involvement, which is crucial for determining treatment strategy and cancer surveillance. **1. Why Option B is Correct:** **Distal Colitis** (also known as Left-sided Colitis) is defined as inflammation that extends beyond the rectum but is limited to the portion of the colon **distal to the splenic flexure** (descending colon, sigmoid colon, and rectum). This is a high-yield anatomical landmark in gastroenterology because it marks the transition between the midgut and hindgut derivatives. **2. Analysis of Incorrect Options:** * **Option A (Proctitis):** This refers to inflammation limited strictly to the **rectum** (within ~15 cm of the anal verge) [1]. While proctitis is a form of distal involvement, "Distal Colitis" specifically implies extension beyond the rectum up to the splenic flexure. * **Option C (Mid transverse colitis):** UC is a continuous disease. If inflammation reaches the transverse colon (proximal to the splenic flexure), it is classified as **Extensive Colitis** or **Pancolitis** (if it reaches the cecum). UC does not "skip" to the mid-transverse colon. **3. High-Yield Clinical Pearls for NEET-PG:** * **Montreal Classification:** * **E1 (Proctitis):** Limited to rectum. * **E2 (Left-sided/Distal):** Up to splenic flexure. * **E3 (Extensive):** Beyond splenic flexure/Pancolitis. * **Backwash Ileitis:** In some cases of pancolitis, the terminal ileum may show mild inflammation; this is the only exception to UC being limited to the colon. * **Smoking Paradox:** Unlike Crohn’s disease, smoking is often **protective** in UC, and disease onset may occur after smoking cessation. * **Treatment Note:** Distal colitis can often be managed with **topical (rectal) therapies** (suppositories/enemas) combined with oral 5-ASA.

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)

Practice Questions

Gastrointestinal Bleeding

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Liver Diseases and Cirrhosis

Practice Questions

Viral Hepatitis

Practice Questions

Biliary Tract Disorders

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Gastrointestinal Motility Disorders

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Gastrointestinal Malignancies

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