Gastroenterology Practice Questions

Q: A patient presents with a history of diarrhea for several years and recent onset of pruritus and elevated alkaline phosphatase. Laboratory tests show normal SGOT/PT, and ultrasound reveals no gallstones or biliary tract abnormalities. What is the most likely diagnosis?

Sclerosing cholangitis. **Explanation:** The clinical presentation points toward **Primary Sclerosing Cholangitis (PSC)**, a chronic cholestatic liver disease characterized by inflammation and fibrosis of the intrahepatic and extrahepatic bile ducts [1]. **1. Why Sclerosing Cholangitis is correct:** * **Association with IBD:** The "history of diarrhea for several years" is a classic hint for **Ulcerative Colitis (UC)**. Approximately 70-80% of patients with PSC have underlying UC [1], [3]. * **Cholestatic Pattern:** Elevated alkaline phosphatase (ALP) with normal transaminases (SGOT/PT) indicates a cholestatic rather than a hepatocellular injury pattern [1]. * **Imaging:** While ultrasound is often normal in early stages (no gallstones), the definitive diagnosis is made via MRCP/ERCP showing the characteristic **"beaded appearance"** of bile ducts. Pruritus is a hallmark symptom of chronic cholestasis [1], [2]. **2. Why other options are incorrect:** * **Hodgkin’s Lymphoma:** While it can cause pruritus and jaundice (due to lymph node compression), it does not explain the chronic diarrhea (IBD link). * **Autoimmune Hepatitis:** This typically presents with significantly elevated transaminases (hepatitic pattern) rather than isolated ALP elevation, and is not classically associated with chronic diarrhea [4]. * **Viral Hepatitis:** This presents with acute or chronic elevation of SGOT/PT and would not typically cause years of diarrhea followed by isolated ALP elevation. **NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** MRCP (initial) or ERCP (confirmatory) showing multifocal strictures and focal dilations ("beading"). * **Antibody:** **p-ANCA** is positive in about 60-80% of cases (though not specific) [1], [3]. * **Malignancy Risk:** PSC significantly increases the risk of **Cholangiocarcinoma** and Colorectal Cancer. * **Biopsy:** May show pathognomonic **"Onion-skin fibrosis"** of the bile ducts.

Q: What is the treatment of choice for a patient with severe alcoholic hepatitis and a high discriminant function score?

Steroids. **Explanation:** Severe alcoholic hepatitis (AH) is characterized by a high risk of short-term mortality. The treatment of choice is **Corticosteroids** (typically Prednisolone 40 mg/day for 28 days). **1. Why Steroids are the Correct Choice:** The decision to treat is based on the **Maddrey Discriminant Function (mDF)** score. A score **≥32** indicates severe AH and a high risk of death. [1] Steroids work by suppressing the profound pro-inflammatory cytokine cascade (TNF-̱, IL-1, IL-6) triggered by alcohol-induced liver injury. The **Lille Score** is subsequently used after 7 days of therapy to assess responsiveness; a score >0.45 suggests steroid non-response, and treatment should be discontinued. **2. Why Other Options are Incorrect:** * **Liver Transplant:** While it is the definitive treatment for end-stage liver disease, most centers require a **6-month period of abstinence** before listing. It is not the immediate first-line treatment for acute AH, though "early transplant" is an emerging concept for select non-responders. * **Colchicine:** It has anti-inflammatory properties but has shown **no survival benefit** in acute alcoholic hepatitis. * **Anti-TNF alpha agents (e.g., Infliximab):** Although TNF-̱ is central to the pathogenesis, clinical trials showed an **increased risk of fatal infections**, making them contraindicated in AH. **High-Yield Clinical Pearls for NEET-PG:** * **Pentoxifylline:** Previously used as an alternative to steroids (to prevent hepatorenal syndrome), but the **STOPAH trial** showed it does not improve survival. It is now only considered if steroids are strictly contraindicated (e.g., active sepsis, GI bleed). * **Nutrition:** Enteral nutrition is a critical adjunctive therapy in AH. * **Most common infection:** Spontaneous Bacterial Peritonitis (SBP) and Urinary Tract Infections (UTI) are common complications to watch for during steroid therapy.

Q: What is the best treatment for irritable bowel syndrome with spastic colon?

Dietary fibers. ### Explanation **Correct Answer: D. Dietary fibers** **Concept:** Irritable Bowel Syndrome (IBS) with a "spastic colon" typically refers to the **IBS-C (Constipation-predominant)** subtype, characterized by abdominal pain and altered bowel habits [1]. **Dietary fiber** (especially soluble fiber like Psyllium/Ispaghula) is considered the first-line treatment. Fiber acts as a bulking agent that increases stool volume and softens consistency by retaining water [2]. This stretches the colonic wall, promoting regular peristalsis and reducing high-pressure segmental contractions (spasms), thereby alleviating both constipation and associated pain. **Why Incorrect Options are Wrong:** * **A. Liquid paraffin:** This is an emollient/lubricant laxative. While it softens stool, it is not recommended for long-term IBS management due to risks of lipid pneumonia (if aspirated) and interference with the absorption of fat-soluble vitamins (A, D, E, K). * **B. Senna & C. Bisacodyl:** These are **stimulant laxatives**. While effective for acute constipation, they can worsen abdominal cramping and "spastic" pain in IBS patients. Chronic use is generally discouraged as a first-line approach in IBS due to potential dependency and electrolyte imbalances. **High-Yield Clinical Pearls for NEET-PG:** * **First-line management for IBS:** Lifestyle modification, stress reduction, and fiber supplementation [1]. * **Soluble vs. Insoluble Fiber:** Soluble fiber (Psyllium) is preferred. Insoluble fiber (Bran) may actually worsen bloating and pain in some IBS patients. * **Antispasmodics:** For acute relief of "spastic" pain, drugs like **Dicyclomine** or **Hyoscyamine** (anticholinergics) are used. * **Rome IV Criteria:** The current gold standard for diagnosing IBS (recurrent abdominal pain ≥1 day/week in the last 3 months associated with ≥2 criteria: related to defecation, change in frequency, or change in form of stool) [1].

Q: A 40-year-old woman with a history of hyperparathyroidism presents with a 2-month history of burning epigastric pain, relieved by antacids or food. She also reports a recent history of tarry stools and denies taking aspirin or NSAIDs. Laboratory studies show a microcytic, hypochromic anemia. Gastroscopy reveals a bleeding mucosal defect in the antrum. Which of the following best characterizes the pathogenesis of epigastric pain in this patient?

Increased secretion of gastrin. The patient presents with symptoms of **Peptic Ulcer Disease (PUD)** (burning epigastric pain, melena, and microcytic anemia) in the setting of **primary hyperparathyroidism**. The underlying mechanism linking these two conditions is the effect of hypercalcemia on gastric acid secretion. **1. Why Option D is Correct:** In primary hyperparathyroidism, elevated serum calcium levels directly stimulate the G-cells in the gastric antrum to secrete **gastrin**. Gastrin, in turn, acts on parietal cells to increase hydrochloric acid production [1]. This hyperchlorhydria leads to mucosal injury and the formation of peptic ulcers. Additionally, this presentation should raise suspicion for **MEN 1 syndrome** (Wermer syndrome), where hyperparathyroidism coexists with pancreatic tumors (like Gastrinomas/Zollinger-Ellison Syndrome), further elevating gastrin levels [2]. **2. Why Other Options are Wrong:** * **Options A & B:** In primary hyperparathyroidism, there is typically *increased* calcium resorption (due to PTH action on kidneys) and *increased* serum PTH levels. These options describe the opposite of the patient's likely physiological state. * **Option C:** The stomach does not require "responsiveness" to PTH to develop ulcers; rather, it responds to the systemic **hypercalcemia** caused by the PTH. **3. NEET-PG High-Yield Pearls:** * **Hypercalcemia & Digestion:** "Stones, bones, abdominal moans, and psychic groans." The "abdominal moans" refer to PUD and pancreatitis, both triggered by high calcium. * **MEN 1 Syndrome (3 Ps):** **P**arathyroid hyperplasia (most common), **P**ancreatic islet cell tumors (e.g., Gastrinoma), and **P**ituitary adenoma. * **Diagnosis:** If a patient has recurrent or refractory ulcers, always check serum calcium and gastrin levels to rule out MEN 1 or Gastrinoma.

Q: What is the most common cause for Budd-Chiari syndrome?

Polycythemia vera. **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 Polycythemia Vera (PV) is the correct answer:** The primary underlying mechanism of BCS is a hypercoagulable state. **Polycythemia Vera**, a myeloproliferative neoplasm, is the **most common specific cause** (etiology) of BCS, accounting for nearly 10–40% of cases. The increased red cell mass and associated JAK2 mutations significantly increase the risk of venous thrombosis in the hepatic vasculature. **Analysis of Incorrect Options:** * **A. Right ventricular failure:** While this causes hepatic congestion (congestive hepatopathy or "nutmeg liver"), it is technically excluded from the definition of BCS, which requires the obstruction to be intra-hepatic or in the IVC, not the heart [1]. * **B. Paroxysmal nocturnal hemoglobinuria (PNH):** PNH is a very strong risk factor for BCS and has the highest *relative* risk, but it is less common in the general population than PV, making it a less frequent cause overall. * **C. Thrombosis in hepatic veins:** This is the **pathological process** (the "what"), but the question asks for the **cause** (the "why"). Thrombosis is the result of an underlying condition like PV. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Abdominal pain, ascites, and hepatomegaly. * **Most common cause worldwide:** Myeloproliferative disorders (PV being the leader). * **Most common cause in Asia/India:** Membranous webs of the Inferior Vena Cava (IVC). * **Imaging of choice:** Doppler Ultrasound (shows "spiderweb" collateral vessels). * **Gold Standard:** Venography. * **Biopsy finding:** Centrilobular congestion and necrosis (Zone 3).

Q: All of the following are causes of acute pancreatitis except?

Hemochromatosis. Explanation: Acute pancreatitis is an inflammatory condition of the pancreas characterized by the premature activation of digestive enzymes [1]. Why Hemochromatosis is the correct answer: Hemochromatosis is a condition of iron overload where iron deposits (hemosiderin) accumulate in the parenchymal cells of various organs. In the pancreas, iron deposition primarily affects the Islets of Langerhans (endocrine pancreas), leading to Diabetes Mellitus (often called "Bronze Diabetes"). While it causes chronic structural damage and fibrosis (Chronic Pancreatitis), it is not a recognized cause of an acute inflammatory episode (Acute Pancreatitis). Analysis of other options: * Gallstones (Option A): The most common cause of acute pancreatitis worldwide (approx. 40%) [1]. Obstruction of the ampulla of Vater leads to backflow of bile and pancreatic juice, triggering enzyme activation. * Alcohol (Option B): The second most common cause [1]. Ethanol exerts a direct toxic effect on acinar cells and increases the protein content of pancreatic secretions, leading to ductal plugging. * Hypercalcemia (Option D): Elevated calcium levels (e.g., due to Hyperparathyroidism) can lead to the activation of trypsinogen to trypsin within the pancreatic parenchyma and can also form calcium stones in the pancreatic duct. High-Yield Clinical Pearls for NEET-PG: * Mnemonic for Causes: "I GET SMASHED" (Idiopathic, Gallstones, Ethanol, Trauma, Steroids, Mumps, Autoimmune, Scorpion sting, Hypertriglyceridemia/Hypercalcemia, ERCP, Drugs) [1]. * Hypertriglyceridemia: Only causes pancreatitis when levels exceed >1000 mg/dL. * Drug-induced: Common culprits include Azathioprine, Sulfonamides, Valproate, and Thiazides. * Scorpion Sting: Specifically the Tityus trinitatis species.

Question 1

A patient presents with a history of diarrhea for several years and recent onset of pruritus and elevated alkaline phosphatase. Laboratory tests show normal SGOT/PT, and ultrasound reveals no gallstones or biliary tract abnormalities. What is the most likely diagnosis?

Accepted Answer

Sclerosing cholangitis

Answer

Hodgkin's Lymphoma

Answer

Autoimmune Hepatitis

Answer

Viral Hepatitis

Question 2

What is the treatment of choice for a patient with severe alcoholic hepatitis and a high discriminant function score?

Accepted Answer

Steroids

Answer

Liver transplant

Answer

Colchicine

Answer

Anti-TNF alpha agents

Question 3

A patient presents with malena, hyperpigmentation over the lips, oral mucosa, and skin. His sister has similar complaints. What is the most likely diagnosis?

Accepted Answer

Peutz-Jeghers Syndrome

Answer

Familial Adenomatous Polyposis

Answer

Gardner's Syndrome

Answer

Villous Adenoma

Question 4

Protein losing enteropathy is characterized by which of the following findings, except?

Accepted Answer

Normal lymphatic flow

Answer

Decreased serum albumin and globulin

Answer

99mTc-dextran radionuclide study performed

Answer

Lymphangiectasia on biopsy

Question 5

What is the best treatment for irritable bowel syndrome with spastic colon?

Accepted Answer

Dietary fibers

Answer

Liquid paraffin

Answer

Senna

Answer

Bisacodyl

Question 6

What is the primary treatment for Zollinger-Ellison syndrome?

Accepted Answer

Omeprazole

Answer

Cimetidine

Answer

Misoprostol

Answer

Aluminium hydroxide

Question 7

A 40-year-old woman with a history of hyperparathyroidism presents with a 2-month history of burning epigastric pain, relieved by antacids or food. She also reports a recent history of tarry stools and denies taking aspirin or NSAIDs. Laboratory studies show a microcytic, hypochromic anemia. Gastroscopy reveals a bleeding mucosal defect in the antrum. Which of the following best characterizes the pathogenesis of epigastric pain in this patient?

Accepted Answer

Increased secretion of gastrin

Answer

Decreased calcium resorption by renal tubules

Answer

Decreased serum levels of parathyroid hormone (PTH)

Answer

Gastric nonresponsiveness to parathyroid hormone (PTH)

Question 8

Hereditary chronic pancreatitis is caused by mutation of which gene?

Accepted Answer

Cationic trypsinogen or PRSS1

Answer

CFTR

Answer

PTSI

Answer

SPINK1

Question 9

What is the most common cause for Budd-Chiari syndrome?

Accepted Answer

Polycythemia vera

Answer

Right ventricular failure

Answer

Paroxysmal nocturnal hemoglobinuria (PNH)

Answer

Thrombosis in hepatic veins

Question 10

All of the following are causes of acute pancreatitis except?

Accepted Answer

Hemochromatosis

Answer

Gall stones

Answer

Alcohol

Answer

Hypercalcemia

Gastroenterology — MCQs

Gastroenterology — MCQs

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