Gastroenterology Practice Questions

Q: What is the most common cause of gastrointestinal bleeding?

Duodenal ulcer. **Explanation:** **1. Why Duodenal Ulcer is Correct:** Peptic Ulcer Disease (PUD) is the most common cause of upper gastrointestinal bleeding (UGIB) worldwide, accounting for approximately 50% of cases [1]. Within PUD, **Duodenal Ulcers (DU)** are significantly more common than gastric ulcers [2]. Bleeding typically occurs when the ulcer erodes into a vessel, most commonly the **gastroduodenal artery** (located behind the first part of the duodenum) [1]. **2. Analysis of Incorrect Options:** * **Gastric Cancer:** While a significant cause of chronic occult blood loss and anemia, it is a relatively uncommon cause of acute, massive GI bleeding compared to PUD. * **Esophageal Varices:** This is the most common cause of *massive* or *life-threatening* UGIB in patients with portal hypertension (cirrhosis), but it is not the most common cause in the general population [1]. * **Erosive Gastritis:** Often caused by NSAIDs or alcohol, this is a frequent cause of UGIB but ranks behind PUD in overall prevalence [1]. **3. NEET-PG High-Yield Pearls:** * **Most common cause of UGIB:** Duodenal Ulcer. * **Most common cause of Lower GI Bleeding:** Diverticulosis (in adults) and Meckel’s Diverticulum (in children). * **Rockall Score & Glasgow-Blatchford Score:** These are high-yield clinical scoring systems used to risk-stratify patients with UGIB [1]. * **Dieulafoy’s Lesion:** A rare but classic "exam favorite" cause of UGIB involving a large submucosal artery that bleeds through a tiny mucosal defect, usually in the lesser curvature of the stomach.

Q: Which of the following is NOT typically seen in cirrhosis of the liver?

Enlargement of the testis. In cirrhosis of the liver, the primary hormonal derangement is **hyperestrogenism** (excess estrogen) and **hypogonadism** (decreased testosterone). This occurs because the damaged liver cannot effectively clear androstenedione, which is then peripherally converted into estrogen by aromatase. **Why "Enlargement of the testis" is the correct answer:** Hyperestrogenism exerts negative feedback on the hypothalamus and pituitary gland, leading to decreased secretion of FSH and LH [1]. This results in **testicular atrophy** (shrinkage), not enlargement [1]. Therefore, enlargement of the testis is not a feature of cirrhosis. **Why the other options are incorrect:** * **Gynaecomastia:** Increased estrogen levels stimulate breast tissue proliferation in males, a classic sign of chronic liver disease [1], [2]. * **Absence of pubic and facial hair:** High estrogen levels and low testosterone lead to a "feminizing" effect, resulting in the loss of secondary male sexual characteristics, including thinning or loss of axillary, pubic, and facial hair [1]. * **Loss of libido:** This is a direct consequence of low serum testosterone levels (hypogonadism) associated with liver failure [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Spider Angiomata & Palmar Erythema:** These are also caused by hyperestrogenism due to its vasodilatory effects [1]. * **Feminization in Cirrhosis:** The combination of gynaecomastia, testicular atrophy, and loss of male hair distribution is collectively termed "feminization" [1]. * **Spironolactone:** This diuretic, often used to treat ascites in cirrhosis, can further worsen gynaecomastia due to its anti-androgenic properties.

Q: Pseudochylous ascites is most commonly associated with which of the following conditions?

Malignant ascites. Explanation: Pseudochylous ascites is defined by a milky appearance of the ascitic fluid that mimics chyle but lacks a high triglyceride content. The milky turbidity is instead caused by cellular degeneration and the presence of lecithin-globulin complexes (phospholipids) derived from the breakdown of tumor cells or inflammatory cells. 1. Why Malignant Ascites is Correct: Malignancy is the most common cause of pseudochylous ascites. In advanced cancers, rapid cell turnover and necrosis lead to the release of intracellular lipids and proteins into the peritoneal cavity [1]. Unlike true chylous ascites (caused by lymphatic obstruction), pseudochylous ascites has low triglyceride levels (usually <200 mg/dL) and does not clear upon adding ether. 2. Analysis of Incorrect Options: * Cirrhosis: Typically presents with transudative, clear, or straw-colored fluid. While cirrhosis can occasionally cause chylous ascites (due to high lymph flow), it is not the primary cause of pseudochylous fluid. * Hyperlipidemia: While systemic hyperlipidemia can affect serum appearance, it does not directly cause the accumulation of milky ascitic fluid unless there is a secondary mechanism of leakage or exudation. * Filariasis: This is a classic cause of True Chylous Ascites. It occurs due to the physical obstruction of lymphatic vessels by parasites, leading to the leakage of triglyceride-rich chyle into the peritoneum. 3. NEET-PG High-Yield Pearls: * True Chylous Ascites: High Triglycerides (>200 mg/dL), presence of chylomicrons, clears with ether. Most common causes: Lymphoma (adults) and congenital lymphatic malformations (children). * Pseudochylous Ascites: Low Triglycerides, high cholesterol/phospholipids, does not clear with ether. Most common cause: Malignancy or chronic inflammation (e.g., Tuberculosis). * Chyliform Ascites: A rare term sometimes used for fluid with high lecithin-globulin complexes, often used interchangeably with pseudochylous.

Q: A 19-year-old army recruit provides urine and blood samples for further testing. Serum analysis reveals elevated ALT, HBsAg, Anti-HBc, HBeAg, and bilirubin, with all other values being normal. What is the hepatitis B status of this recruit?

Chronic active hepatitis B. ### Explanation The correct answer is **Chronic active hepatitis B**. **1. Why the correct answer is right:** The diagnosis is based on the interpretation of the hepatitis B serological markers and liver enzymes: * **HBsAg (+):** Indicates the presence of the virus (either acute or chronic). * **Anti-HBc (+):** In this context, it signifies exposure. Since the patient is a young adult in a high-risk setting (army recruit) and shows signs of active replication, this points toward a persistent infection. * **HBeAg (+):** This is the hallmark of **active viral replication** and high infectivity. * **Elevated ALT & Bilirubin:** These indicate ongoing **hepatocellular necrosis** and inflammation. The combination of persistent viral markers (HBsAg) and biochemical evidence of liver damage (elevated ALT) defines the "active" state of chronic hepatitis B. **2. Why the incorrect options are wrong:** * **Asymptomatic carrier:** While HBsAg would be positive, an asymptomatic carrier typically has **normal ALT levels** and is often HBeAg negative (with Anti-HBe positive), indicating low viral replication and no active liver injury. * **Fulminant hepatitis B:** This presents with severe liver failure, characterized by encephalopathy and significantly deranged coagulation profiles (prolonged PT/INR), which are not mentioned here. * **Recovered from acute HBV:** A recovered patient would be **HBsAg negative** and **Anti-HBs positive**, indicating immunity. **3. NEET-PG High-Yield Pearls:** * **HBeAg** is the best indicator of **infectivity** and replication. * **Anti-HBc IgM** is the sole marker positive during the **"Window Period."** * **Chronic infection** is defined by the persistence of HBsAg for >6 months. * **Ground-glass hepatocytes** on liver biopsy are characteristic of chronic HBV infection.

Q: A young patient presents with jaundice. Total bilirubin is 21 mg/dL, direct bilirubin is 9.6 mg/dL, and alkaline phosphatase is 84 King-Armstrong units. What is the most likely diagnosis?

Obstructive jaundice. ### Explanation The clinical presentation and laboratory findings point towards **Obstructive (Post-hepatic) Jaundice**. **1. Why Obstructive Jaundice is Correct:** * **Conjugated Hyperbilirubinemia:** The total bilirubin is 21 mg/dL, and the direct (conjugated) bilirubin is 9.6 mg/dL. In obstructive jaundice, direct bilirubin typically accounts for more than 50% of the total bilirubin due to the back-leakage of conjugated bile into the bloodstream [2]. * **Markedly Elevated Alkaline Phosphatase (ALP):** The ALP is 84 King-Armstrong (KA) units. The normal range for ALP is 3–13 KA units. An elevation of more than 3–4 times the upper limit of normal is a classic hallmark of cholestasis or biliary obstruction [1]. **2. Why the Other Options are Incorrect:** * **A. Hemolytic Jaundice:** Characterized by **unconjugated (indirect) hyperbilirubinemia**. Total bilirubin rarely exceeds 5 mg/dL, and ALP levels remain normal [2]. * **B & C. Viral/Chronic Active Hepatitis:** These are hepatocellular causes of jaundice [1]. While they can cause conjugated hyperbilirubinemia, the primary laboratory feature is a massive rise in transaminases (AST/ALT) [1]. ALP may be elevated but usually less than 2–3 times the normal limit. **3. NEET-PG High-Yield Pearls:** * **Bilirubin Levels:** In surgical/obstructive jaundice (e.g., carcinoma head of pancreas), bilirubin can reach very high levels (up to 20–30 mg/dL), whereas in hemolysis, it stays low. * **Enzyme Ratios:** A high **ALP-to-ALT ratio** suggests obstruction, while a high **ALT-to-ALP ratio** suggests hepatocellular damage [1]. * **Courvoisier’s Law:** In a patient with obstructive jaundice, if the gallbladder is palpable, the obstruction is likely due to a malignancy (e.g., periampullary carcinoma) rather than gallstones.

Q: Which drug is used for achalasia cardia?

Nifedipine. 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]. The primary goal of pharmacological therapy is to reduce the resting LES pressure to facilitate the passage of food. Why Nifedipine is correct: Nifedipine is a Calcium Channel Blocker (CCB). Calcium is essential for smooth muscle contraction; by blocking calcium influx into the smooth muscle cells of the LES, Nifedipine promotes smooth muscle relaxation [3]. It is typically administered sublingually 15–30 minutes before meals. While definitive treatments include pneumatic dilation or Myotomy (Heller’s), CCBs are used as temporizing measures or in patients who are poor surgical candidates [4]. Why other options are incorrect: * Propranolol & Atenolol: These are Beta-blockers. They primarily affect heart rate and blood pressure [3]. They have no significant effect on relaxing the smooth muscles of the esophagus and are not indicated for motility disorders. * Bethanechol: This is a cholinergic agonist (parasympathomimetic). It actually increases the tone of the LES and stimulates GI motility, which would worsen the symptoms of achalasia. Clinical Pearls for NEET-PG: * Drug of Choice (Medical): Nitrates (e.g., Isosorbide dinitrate) and CCBs (Nifedipine) are the most common oral agents [2]. * Gold Standard Diagnosis: Esophageal Manometry (shows incomplete LES relaxation and aperistalsis). * Barium Swallow Finding: "Bird’s Beak" appearance [1]. * Botulinum Toxin: Can be injected endoscopically into the LES to inhibit acetylcholine release, causing relaxation (used in elderly/high-risk patients) [4].

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

Barrett's Esophagus. **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.

Q: A 54-year-old clerk complains of having had dysphagia for 15 years. The clinical diagnosis of achalasia is confirmed by a barium study. What is TRUE in this condition?

The most common symptom is dysphagia.. **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 A is Correct:** **Dysphagia** is the hallmark and most common presenting symptom (seen in >90% of patients). It is typically chronic and progressive. In achalasia, the dysphagia is unique because it occurs for **both solids and liquids** from the onset, or may even be more pronounced for liquids initially (paradoxical dysphagia). 2. **Why the other options are Incorrect:** * **Option B:** In mechanical obstructions (like carcinoma), dysphagia starts with solids and progresses to liquids. In motility disorders like achalasia, dysphagia for **liquids** is often as prominent as, or more prominent than, solids in the early stages. * **Option C:** Achalasia is a premalignant condition, but it increases the risk of **Squamous Cell Carcinoma**, not sarcoma. The risk is due to chronic irritation from stasis of food (stasis esophagitis). * **Option D:** Recurrent pulmonary infections are **common**, not rare. Regurgitation of undigested food, especially while supine at night, leads to aspiration, resulting in nocturnal cough, aspiration pneumonia, and bronchiectasis. **High-Yield Clinical Pearls for NEET-PG:** * **Pathophysiology:** Loss of inhibitory postganglionic neurons (containing NO and VIP) in the **Auerbach’s (myenteric) plexus**. * **Barium Swallow:** Shows a classic **"Bird’s Beak"** appearance (tapering at the GE junction) with proximal dilatation. * **Manometry (Gold Standard):** Shows incomplete LES relaxation (residual pressure >10 mmHg) and aperistalsis. * **Treatment of Choice:** Laparoscopic Heller’s Myotomy with a partial fundoplication (Dor or Toupet).

Q: 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?

Balloon dilatation. ### 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 1

Which of the following findings does not occur in a patient with gastrinoma?

Accepted Answer

Basal acid output (BAO) less than 15 mEq/litre

Answer

Epigastric pain

Answer

Diarrhoea

Answer

Serum gastrin levels >200 pg/ml

Question 2

What is the most common cause of gastrointestinal bleeding?

Accepted Answer

Duodenal ulcer

Answer

Gastric cancer

Answer

Esophageal varices

Answer

Erosive gastritis

Question 3

Which of the following is NOT typically seen in cirrhosis of the liver?

Accepted Answer

Enlargement of the testis

Answer

Gynaecomastia

Answer

Absence of pubic and facial hair

Answer

Loss of libido

Question 4

Pseudochylous ascites is most commonly associated with which of the following conditions?

Accepted Answer

Malignant ascites

Answer

Cirrhosis

Answer

Hyperlipidemia

Answer

Filariasis

Question 5

A 19-year-old army recruit provides urine and blood samples for further testing. Serum analysis reveals elevated ALT, HBsAg, Anti-HBc, HBeAg, and bilirubin, with all other values being normal. What is the hepatitis B status of this recruit?

Accepted Answer

Chronic active hepatitis B

Answer

Asymptomatic carrier

Answer

Fulminant hepatitis B

Answer

Recovered from acute self-limited HBV

Question 6

A young patient presents with jaundice. Total bilirubin is 21 mg/dL, direct bilirubin is 9.6 mg/dL, and alkaline phosphatase is 84 King-Armstrong units. What is the most likely diagnosis?

Accepted Answer

Obstructive jaundice

Answer

Hemolytic jaundice

Answer

Viral hepatitis

Answer

Chronic active hepatitis

Question 7

Which drug is used for achalasia cardia?

Accepted Answer

Nifedipine

Answer

Propranolol

Answer

Atenolol

Answer

Bethnecol

Question 8

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

Accepted Answer

Barrett's Esophagus

Answer

Achalasia cardia

Answer

Smoking

Answer

Tylosis

Question 9

A 54-year-old clerk complains of having had dysphagia for 15 years. The clinical diagnosis of achalasia is confirmed by a barium study. What is TRUE in this condition?

Accepted Answer

The most common symptom is dysphagia.

Answer

In the early stages, dysphagia is more pronounced for solids than liquids.

Answer

The incidence of sarcoma is increased.

Answer

Recurrent pulmonary infections are rare.

Question 10

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?

Accepted Answer

Balloon dilatation

Answer

Endoscopic banding

Answer

Sclerotherapy

Answer

Proton pump inhibitor

Gastroenterology — MCQs

Gastroenterology — MCQs

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