Gastroenterology Practice Questions

Q: In Wilson disease, hepatic copper content usually exceeds which of the following values per gram of dry weight?

250 mg/g. **Explanation:** Wilson disease (Hepatolenticular degeneration) is an autosomal recessive disorder caused by a mutation in the **ATP7B gene** on chromosome 13. This defect leads to impaired biliary excretion of copper and its subsequent accumulation in various organs, primarily the liver and brain [1]. **Why Option B is Correct:** The gold standard for diagnosing Wilson disease is the measurement of hepatic copper concentration via liver biopsy. In healthy individuals, the copper content is typically <50 µg/g of dry weight. In patients with Wilson disease, the concentration **usually exceeds 250 µg/g dry weight**. This threshold is highly sensitive (up to 90%) and is a critical diagnostic criterion in the Leipzig scoring system. **Why Other Options are Incorrect:** * **Option A (200 µg/g):** While values between 75–250 µg/g can be seen in some patients (especially those with advanced cirrhosis or those already on treatment), 250 µg/g is the established diagnostic cutoff for a definitive diagnosis. * **Options C & D (300 & 350 µg/g):** These values are seen in severe cases of Wilson disease, but they are too high to serve as the standard diagnostic baseline. Using these as cutoffs would result in many false negatives. **High-Yield Clinical Pearls for NEET-PG:** * **Kayser-Fleischer (KF) Rings:** Found in the Descemet membrane of the cornea; present in 95% of neurological cases but only 50-60% of hepatic cases [1]. * **Serum Ceruloplasmin:** Usually low ( 100 µg/day. * **Treatment:** **Trientine** is now preferred over D-Penicillamine due to fewer side effects. Zinc is used for maintenance therapy.

Q: All of the following are common causes of hematemesis except?

Pernicious anemia. Hematemesis (vomiting of blood) indicates an upper gastrointestinal (UGI) bleed, typically originating proximal to the ligament of Treitz. **Why Pernicious Anemia is the correct answer:** Pernicious anemia is an autoimmune condition characterized by antibodies against parietal cells or intrinsic factor, leading to **atrophic gastritis** [1]. This results in **achlorhydria** (absence of hydrochloric acid) and vitamin B12 deficiency [1]. Because the gastric mucosa is atrophic (thinned out) and acid production is absent, the environment is not conducive to acute ulceration or erosive bleeding. While it increases the long-term risk of gastric adenocarcinoma, it is not a direct or common cause of hematemesis. **Analysis of incorrect options:** * **Chronic Peptic Ulcer:** This is the **most common cause** of UGI bleeding worldwide [2]. Erosion into a mucosal vessel (e.g., gastroduodenal artery) leads to significant hematemesis [3]. * **Esophageal Varices:** Common in patients with portal hypertension (cirrhosis). These represent dilated submucosal veins that can rupture, causing massive, life-threatening hematemesis [2]. * **Carcinoma of Stomach:** Malignant ulcers are friable and prone to chronic oozing or acute bleeding, making it a well-recognized cause of hematemesis in older populations [3]. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of Hematemesis:** Peptic Ulcer Disease (PUD) [2]. * **Mallory-Weiss Tear:** Hematemesis following bouts of forceful vomiting/retching (often post-alcohol binge). * **Dieulafoy’s Lesion:** A rare cause of massive hematemesis due to an abnormally large submucosal artery that erodes the overlying epithelium. * **Rockall Score/Blatchford Score:** Used to risk-stratify patients with UGI bleeding [2].

Q: This condition is caused by:

Paralytic ileus. ***Paralytic ileus*** - Characterized by **generalized bowel dilatation** with **gas-filled loops** throughout the small and large intestine on abdominal X-ray, without clear transition points. - Presents with **absent or diminished bowel sounds**, abdominal distension, and **delayed passage of gas and stool** due to impaired intestinal motility. *Hyperkalemia* - Primarily causes **cardiac arrhythmias** and **muscle weakness**, not the generalized bowel dilatation pattern seen on imaging. - While severe hyperkalemia can contribute to **ileus**, it's not the primary radiological diagnosis based on the bowel gas pattern. *Acute intestinal obstruction* - Shows **localized bowel dilatation** proximal to the obstruction with a clear **transition zone** and **air-fluid levels** in a step-ladder pattern. - Typically presents with **high-pitched bowel sounds** and **cramping abdominal pain**, contrasting with the quiet abdomen of paralytic ileus. *Malnutrition* - Causes **generalized weakness** and **delayed wound healing** but doesn't produce the characteristic bowel gas distribution pattern. - While malnutrition can predispose to **delayed gastric emptying**, it doesn't directly cause the radiological findings of paralytic ileus.

Q: All the following statements regarding Hepatitis B are true except?

Steroids are the drug of choice in chronic Hepatitis B.. ### Explanation **1. Why Option C is the correct answer (The "Except" statement):** Steroids are **not** the drug of choice for Chronic Hepatitis B (CHB). In fact, corticosteroids are generally contraindicated because they can suppress the immune response, leading to increased viral replication. Abrupt withdrawal of steroids in a CHB patient can trigger a life-threatening "biochemical flare" or acute exacerbation. The standard of care for CHB involves antiviral therapy with **Nucleoside/Nucleotide analogues** (e.g., Tenofovir, Entecavir) or **Pegylated Interferon-alpha** [1]. **2. Analysis of other options:** * **Option A:** Hepatitis D (Delta virus) is a defective RNA virus that requires the HBsAg coat to replicate. It occurs either as a **Co-infection** (simultaneous infection with HBV, usually self-limiting) or a **Superinfection** (HDV infecting a chronic HBV carrier, often leading to rapid progression to cirrhosis). * **Option B:** **HBeAg** is a qualitative marker of high infectivity and active viral replication [1]. Its presence correlates with high levels of HBV DNA in the serum. * **Option D:** HBV is a well-known oncogenic virus. Chronic inflammation and the integration of HBV DNA into the host genome can lead to **Hepatocellular Carcinoma (HCC)**, even in the absence of cirrhosis [1]. ### NEET-PG High-Yield Pearls * **Window Period:** The interval where HBsAg and Anti-HBs are both negative; **Anti-HBc IgM** is the only diagnostic marker during this phase [1]. * **First marker to appear:** HBsAg (appears before symptoms) [1]. * **Marker of Immunity:** Anti-HBs (appears after vaccination or recovery) [1]. * **Ground Glass Hepatocytes:** The characteristic histopathological finding in Chronic HBV due to HBsAg accumulation in the endoplasmic reticulum. * **Extrahepatic Manifestations:** Polyarteritis Nodosa (PAN) and Membranous Nephropathy are strongly associated with HBV.

Q: What is true in a case of chronic pancreatitis?

Complete destruction of pancreatic tissue. **Explanation:** Chronic pancreatitis is characterized by **irreversible** morphologic changes. The core pathophysiology involves progressive inflammation leading to the **complete destruction of pancreatic parenchyma** (both exocrine and endocrine components), which is eventually replaced by dense fibrous connective tissue [1]. This leads to the classic triad of steatorrhea, diabetes mellitus, and pancreatic calcifications. **Analysis of Options:** * **Option B (Correct):** As the disease progresses, there is a total loss of acinar and islet cell mass, resulting in permanent functional insufficiency [1]. * **Option A (Incorrect):** Pancreatic pseudocysts are "pseudo" because they **lack an epithelial lining**. They are walled off by granulation and fibrous tissue, not gastric epithelium. * **Option C (Incorrect):** The most common cause of chronic pancreatitis worldwide is **chronic alcohol consumption** (70-80%) [1]. Biliary tract disease (gallstones) is a common cause of *acute* pancreatitis but rarely leads to chronic disease. * **Option D (Incorrect):** While gene mutations (e.g., **PRSS1, SPINK1, CFTR**) are associated with hereditary and idiopathic forms, they are not a universal finding in all cases of chronic pancreatitis. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Steatorrhea + Diabetes + Pancreatic Calcifications (seen on X-ray/CT) [1], [2]. * **Most sensitive test:** Secretin stimulation test (shows decreased bicarbonate output). * **Best initial imaging:** Contrast-Enhanced CT (CECT) to visualize calcifications and ductal dilation ("Chain of Lakes" appearance) [2]. * **Pain Management:** Steatorrhea is managed with pancreatic enzyme replacement therapy (PERT), which also helps reduce pain by suppressing CCK release.

Q: A 65-year-old patient with coronary artery disease was on Aspirin for 2 years. He now complains of black stools. Abdominal examination is normal. What is the most probable diagnosis?

Duodenal ulcer. **Explanation:** The patient presents with **melena** (black, tarry stools), which is a hallmark sign of **Upper Gastrointestinal Bleeding (UGIB)**. The most significant clue in the history is the long-term use of **Aspirin**, a Non-Steroidal Anti-Inflammatory Drug (NSAID) [1]. **1. Why Duodenal Ulcer is correct:** NSAIDs like Aspirin inhibit the COX-1 enzyme, leading to decreased synthesis of prostaglandins. Prostaglandins are essential for maintaining the gastric mucosal barrier. Their depletion results in mucosal injury, making **Peptic Ulcer Disease (PUD)** the most common cause of UGIB. Statistically, duodenal ulcers are more common than gastric ulcers in the context of chronic NSAID use and are a frequent source of melena [1]. **2. Why other options are incorrect:** * **Ileocecal TB:** Usually presents with chronic abdominal pain, fever, weight loss, and altered bowel habits (diarrhea/constipation). While it can cause bleeding, it typically presents as hematochezia (bright red blood) or occult blood, not gross melena. * **Carcinoma of Colon:** Right-sided colon cancers cause occult bleeding and anemia; left-sided cancers cause altered bowel habits and hematochezia. Melena is rare as the bleeding source is distal to the ligament of Treitz. * **Esophageal Varices:** While a common cause of UGIB, it is associated with portal hypertension (cirrhosis, jaundice, splenomegaly). This patient has no history of liver disease but has a clear risk factor (Aspirin) for PUD [2]. **Clinical Pearls for NEET-PG:** * **Most common cause of UGIB:** Peptic Ulcer Disease [2]. * **Melena** indicates that blood has been present in the GI tract for at least 8 hours and usually originates proximal to the ligament of Treitz. * **Prophylaxis:** Patients on long-term Aspirin with high GI risk should be co-prescribed a Proton Pump Inhibitor (PPI) [1].

Question 1

In Wilson disease, hepatic copper content usually exceeds which of the following values per gram of dry weight?

Accepted Answer

250 mg/g

Answer

200 mg/g

Answer

300 mg/g

Answer

350 mg/g

Question 2

Which of the following is a cause for conjugated hyperbilirubinemia?

Accepted Answer

Rotor's syndrome

Answer

Massive hematoma

Answer

Gilbert's syndrome

Answer

Crigler-Najjar syndrome

Question 3

All of the following are common causes of hematemesis except?

Accepted Answer

Pernicious anemia

Answer

Chronic peptic ulcer

Answer

Esophageal varices

Answer

Carcinoma of stomach

Question 4

A patient with cirrhosis of the liver has the following coagulation parameters: Platelet count 2,00,000/mm
3, Prothrombin time 25s (control 12s), Activated partial thromboplastin time 60s (control 35s), Thrombin time 15s (control 15s). Which of the following is true for this patient?

Accepted Answer

D-dimer will be normal

Answer

Fibrinogen will be <100 mg/dL

Answer

Antithrombin III will be high

Answer

Protein C will be elevated

Question 5

A 65-year-old female presented to the OPD with a complaint of abdominal pain immediately after eating, episodes of vomiting, and diarrhea. She has a 20-year history of coronary artery disease. Her BP is 160/100 mm Hg and pulse is 80/min. On abdominal examination, there is no tenderness or rigidity. What is the most likely diagnosis?

Accepted Answer

Chronic mesenteric ischemia

Answer

Peptic ulcer

Answer

Wilkie's disease

Answer

Ulcerative colitis

Question 6

This condition is caused by:

Accepted Answer

Paralytic ileus

Answer

Hyperkalemia

Answer

Acute intestinal obstruction

Answer

Malnutrition

Question 7

Small bowel vascular ectasia is associated with:

Accepted Answer

Chronic renal failure

Answer

Retroviral infection

Answer

Amyloidosis

Answer

Watermelon stomach

Question 8

All the following statements regarding Hepatitis B are true except?

Accepted Answer

Steroids are the drug of choice in chronic Hepatitis B.

Answer

Delta hepatitis can occur as a co-infection or superinfection.

Answer

Hepatitis e antigen indicates that active viral replication is occurring.

Answer

Hepatitis B can lead to Hepato Cellular Carcinoma.

Question 9

What is true in a case of chronic pancreatitis?

Accepted Answer

Complete destruction of pancreatic tissue

Answer

Pseudocyst lined with gastric epithelium

Answer

Most common cause is biliary

Answer

Gene mutation is seen

Question 10

A 65-year-old patient with coronary artery disease was on Aspirin for 2 years. He now complains of black stools. Abdominal examination is normal. What is the most probable diagnosis?

Accepted Answer

Duodenal ulcer

Answer

Ileocecal TB

Answer

Carcinoma of colon

Answer

Esophageal varices

Gastroenterology — MCQs

Gastroenterology — MCQs

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