Gastroenterology Practice Questions

Q: A patient presents with a three-day history of epigastric pain radiating to the back. Serum amylase levels are normal, but ultrasound of the abdomen reveals gall bladder stones and an enlarged pancreas. A CT scan confirms the diagnosis. Which of the following is the most likely diagnosis?

Acute Pancreatitis. The clinical presentation of epigastric pain radiating to the back is a classic hallmark of **Acute Pancreatitis** [1]. While serum amylase is a common screening tool, its levels peak early and often return to normal within 3–5 days. Since this patient presented on the third day, the normal amylase does not rule out the diagnosis. The definitive evidence comes from the CT scan and ultrasound findings of an enlarged pancreas and gallstones (the most common etiology in India) [1], [3]. **Why other options are incorrect:** * **Acute Cholecystitis:** Typically presents with right upper quadrant pain and Murphy’s sign. While gallstones are present here [3], the CT finding of an enlarged pancreas specifically points toward pancreatitis. * **Acute Appendicitis:** Usually presents with periumbilical pain migrating to the right iliac fossa (McBurney's point), not radiation to the back. * **Acute Peritonitis:** Presents with generalized abdominal rigidity, guarding, and rebound tenderness, usually secondary to a perforated viscus [1]. **NEET-PG High-Yield Pearls:** * **Enzymes:** Serum **Lipase** is more specific and remains elevated longer (7–14 days) than Amylase, making it the preferred biochemical marker for delayed presentations. * **Imaging:** Contrast-Enhanced CT (CECT) is the gold standard for assessing severity and complications (like necrosis) [1] but is ideally performed 48–72 hours after symptom onset. * **Etiology:** Remember the mnemonic **GET SMASHED**. Gallstones (Most common) [3] and Alcohol are the top two causes. * **Prognosis:** Ranson’s Criteria and APACHE II scores are frequently tested for predicting severity [2].

Q: Feline esophagus is most commonly associated with which of the following conditions?

Gastroesophageal reflux disease (GERD). **Explanation:** The term **"Feline Esophagus"** (also known as esophageal shingling or transient esophageal rings) refers to the endoscopic appearance of multiple, fine, concentric mucosal rings that resemble the normal anatomy of a cat's esophagus. **1. Why GERD is the correct answer:** While historically debated, current medical literature and standard textbooks (including Harrison’s) associate the classic "feline esophagus" primarily with **Gastroesophageal Reflux Disease (GERD)**. These rings are transient and occur due to the contraction of the *muscularis mucosae* in response to acid irritation [1]. They typically disappear upon esophageal insufflation during endoscopy. **2. Analysis of Incorrect Options:** * **Option A: Eosinophilic Esophagitis (EoE):** This is the most common distractor. EoE is characterized by **fixed** concentric rings (often called "trachealization" of the esophagus). Unlike the transient feline esophagus of GERD, these rings are permanent and do not disappear with air insufflation. * **Option C & D: Radiation Esophagitis and Carcinoma:** These conditions typically present with strictures, ulcerations, or irregular masses rather than the rhythmic, concentric, transient rings seen in feline esophagus. **3. Clinical Pearls for NEET-PG:** * **Feline Esophagus:** Transient rings, associated with **GERD** [1]. * **Trachealization/Ringed Esophagus:** Fixed rings, associated with **Eosinophilic Esophagitis**. * **Endoscopic Triad of EoE:** Fixed rings, linear furrows, and white exudates (microabscesses). * **Key Distinction:** If the question mentions rings that **disappear with insufflation**, think GERD. If they are **fixed/permanent**, think EoE.

Q: Which of the following is the first-line therapy for fulminant ulcerative colitis (UC)?

Steroids. **Explanation:** **Fulminant Ulcerative Colitis (UC)** is a medical emergency characterized by >10 stools per day, continuous bleeding, systemic toxicity (fever, tachycardia), and colonic dilation. **1. Why Steroids are the Correct Choice:** Intravenous (IV) corticosteroids (e.g., **Hydrocortisone 100 mg TID or Methylprednisolone 60 mg daily**) are the **first-line therapy** for inducing remission in acute severe or fulminant UC [1]. They work rapidly to suppress the massive inflammatory surge. Approximately 60–70% of patients respond to steroids within 3–5 days. **2. Why Other Options are Incorrect:** * **Cyclosporine (Option A):** This is a "rescue therapy." It is indicated only if the patient fails to respond to IV steroids after 3–5 days. It is not the initial first-line choice. * **Sulfasalazine (Option B):** 5-ASA compounds are effective for mild-to-moderate UC and maintenance therapy [1]. They have no role in fulminant UC as they are too weak and can paradoxically worsen diarrhea in acute phases. * **Methotrexate (Option C):** While used in Crohn’s disease, it has no proven efficacy in inducing or maintaining remission in Ulcerative Colitis. **3. NEET-PG High-Yield Pearls:** * **The "Rule of 3":** Assess steroid response by day 3. If the patient has >8 stools/day or a CRP >45 mg/L, they are unlikely to respond and need rescue therapy (Infliximab or Cyclosporine) or surgery. * **Toxic Megacolon:** A dreaded complication of fulminant UC. Diagnosis is clinical + X-ray (transverse colon diameter **>6 cm**). * **Avoid:** Antidiarrheals (Loperamide) and Opioids in fulminant UC as they can precipitate toxic megacolon. * **Surgery:** Total proctocolectomy with Ileal Pouch-Anal Anastomosis (IPAA) is the definitive curative procedure [2].

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

Diverticulitis. **Explanation:** **Correct Answer: A. Diverticulosis (Diverticular Disease)** *Note: While the option says "Diverticulitis," in clinical practice and exams, **Diverticulosis** is the most common cause of brisk, painless lower gastrointestinal bleeding (LGIB) in adults, accounting for approximately 30–50% of cases. The bleeding occurs because the vasa recta (nutrient arteries) become stretched over the dome of the diverticulum, leading to eccentric thickening and eventual rupture into the colonic lumen.* [1] **Analysis of Incorrect Options:** * **B. Ulcerative Colitis:** While inflammatory bowel disease (IBD) frequently causes bloody diarrhea, it is a less common cause of massive or acute LGIB compared to diverticular disease. [2] * **C. Angiodysplasia:** These are small vascular malformations (ectasias). While they are a common cause of chronic or occult bleeding in the elderly (especially in the right colon), they account for only about 5–10% of acute LGIB cases. * **D. Colorectal Cancer:** Malignancies typically present with chronic, low-grade occult bleeding (leading to iron deficiency anemia) rather than acute, massive hematochezia. [2] **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of LGIB in adults:** Diverticulosis. * **Most common cause of LGIB in children:** Meckel’s Diverticulum. * **Anatomical Fact:** Although diverticula are more common on the left side (sigmoid colon), diverticular **bleeding** more frequently originates from the **right colon**. * **Clinical Presentation:** Diverticular bleeding is typically **painless** and sudden, whereas bleeding from diverticulitis is rare (inflammation usually obliterates the vessel). * **Management:** Most cases (75%) of diverticular bleeding resolve spontaneously with conservative management. [1]

Q: A patient with jaundice is given Vitamin K, but their Prothrombin Time (PT) remains unchanged. What is the probable cause?

Cirrhosis. **Explanation:** The correct answer is **Cirrhosis**. This question tests the clinical application of the **Koller Test**, which differentiates between obstructive jaundice and parenchymal liver disease. **1. Why Cirrhosis is correct:** Prothrombin Time (PT) depends on the synthesis of clotting factors (II, VII, IX, and X) by the liver. This process requires **Vitamin K** as a cofactor. In **Cirrhosis**, there is extensive damage to the hepatocytes (liver cells). Even if Vitamin K is supplemented, the "factory" (the liver) is too damaged to utilize it to synthesize clotting factors [1]. Therefore, the PT remains prolonged and unchanged. **2. Why the other options are incorrect:** * **Obstructive Jaundice:** In this condition, bile flow is blocked, leading to poor absorption of fat-soluble vitamins (A, D, E, K). The liver cells are initially healthy but lack the raw material (Vitamin K). When Vitamin K is given parenterally, the healthy liver quickly uses it, and the **PT corrects** within 24–48 hours [1]. * **Hemolytic Jaundice:** This is a pre-hepatic condition where jaundice is caused by excessive RBC breakdown. Liver function and Vitamin K absorption are typically normal; thus, PT is usually not prolonged. * **Pre-renal Failure:** This relates to kidney perfusion and does not directly affect the Vitamin K-dependent clotting factor synthesis. **Clinical Pearls for NEET-PG:** * **Koller Test:** If PT improves by >30% within 24 hours of Vitamin K injection, it suggests obstructive jaundice. No improvement suggests parenchymal disease (Cirrhosis). * **Factor VII:** Has the shortest half-life (4–6 hours) among clotting factors, making PT the earliest indicator of acute liver injury [1]. * **Albumin vs. PT:** Albumin is a marker of **chronic** liver synthetic function, while PT is a marker of **acute and chronic** synthetic function [1].

Q: Which part of the esophagus is mainly affected in scleroderma?

Lower third. **Explanation:** The correct answer is **C. Lower third.** **1. Why the Lower Third is affected:** Systemic Sclerosis (Scleroderma) primarily affects **smooth muscle**. The esophagus is anatomically divided by its muscle composition: the upper third consists of skeletal muscle, the middle third is a transition zone, and the **lower two-thirds** consist entirely of smooth muscle. In Scleroderma, vascular damage and fibrosis lead to atrophy of the smooth muscle and dysfunction of the myenteric plexus [1]. This results in: * **Aperistalsis** of the distal (lower) esophagus [1]. * **Incompetence of the Lower Esophageal Sphincter (LES)**, leading to severe Gastroesophageal Reflux Disease (GERD) and potential strictures [1]. **2. Why other options are incorrect:** * **Option A (Upper third):** This segment is composed of **striated (skeletal) muscle**. Diseases affecting this area include Dermatomyositis, Myasthenia Gravis, or Myotonic Dystrophy, rather than Scleroderma [1]. * **Option B (Middle third):** While the middle third contains some smooth muscle and can be partially involved, the pathological hallmark of Scleroderma is most profound in the distal smooth muscle segment and the LES. * **Option D (All the above):** Scleroderma characteristically spares the skeletal muscle of the proximal esophagus. **Clinical Pearls for NEET-PG:** * **CREST Syndrome:** Esophageal dysmotility is the 'E' in CREST [1]. * **Manometry Findings:** Characterized by "Low-amplitude" or absent contractions in the distal esophagus and a "Hypotensive" (low pressure) LES. * **Barrett’s Esophagus:** Due to chronic, severe reflux from a patulous LES, Scleroderma patients are at high risk for Barrett’s and esophageal adenocarcinoma. * **"Glass Pipe" Esophagus:** A radiological description sometimes used for the dilated, aperistaltic esophagus seen on barium swallow.

Question 1

A patient presents with a three-day history of epigastric pain radiating to the back. Serum amylase levels are normal, but ultrasound of the abdomen reveals gall bladder stones and an enlarged pancreas. A CT scan confirms the diagnosis. Which of the following is the most likely diagnosis?

Accepted Answer

Acute Pancreatitis

Answer

Acute Cholecystitis

Answer

Acute Appendicitis

Answer

Acute Peritonitis

Question 2

Feline esophagus is most commonly associated with which of the following conditions?

Accepted Answer

Gastroesophageal reflux disease (GERD)

Answer

Eosinophilic esophagitis

Answer

Radiation esophagitis

Answer

Carcinoma of the esophagus

Question 3

A 25-year-old woman develops nausea, vomiting, and abdominal pain. On examination, she has tender hepatomegaly and ascites. She was recently started on oral contraceptives. What is the most likely clinical diagnosis?

Accepted Answer

Budd-Chiari syndrome

Answer

Acute viral hepatitis

Answer

Portal hypertension

Answer

Acute cholecystitis

Question 4

Which one of the following treatments is effective in primary biliary cirrhosis?

Accepted Answer

Ursodeoxycholic acid

Answer

Prednisolone

Answer

Interferon a-2B

Answer

D-Penicillamine

Question 5

Which of the following is the first-line therapy for fulminant ulcerative colitis (UC)?

Accepted Answer

Steroids

Answer

Cyclosporine

Answer

Sulfasalazine

Answer

Methotrexate

Question 6

Hyper-pigmented skin with xanthelasma and xanthomas suggests the possibility of which diagnosis?

Accepted Answer

Primary biliary cirrhosis

Answer

Primary sclerosing cholangitis

Answer

Amyloidosis

Answer

Tuberculosis

Question 7

What is the most common cause of lower gastrointestinal bleeding in adults?

Accepted Answer

Diverticulitis

Answer

Ulcerative colitis

Answer

Angiodysplasia of the colon

Answer

Colorectal cancer

Question 8

A patient with jaundice is given Vitamin K, but their Prothrombin Time (PT) remains unchanged. What is the probable cause?

Accepted Answer

Cirrhosis

Answer

Obstructive Jaundice

Answer

Hemolytic Jaundice

Answer

Pre-renal Failure

Question 9

A 55-year-old male patient was diagnosed with chronic hepatitis C and responded to interferon treatment. After one year of follow-up, he experienced a relapse of the disease. Which of the following would be the next most appropriate choice?

Accepted Answer

Ribavirin and interferon

Answer

Lamivudine and interferon

Answer

Nevirapine and lamivudine

Answer

Indinavir and ribavirin

Question 10

Which part of the esophagus is mainly affected in scleroderma?

Accepted Answer

Lower third

Answer

Upper third

Answer

Middle third

Answer

All the above

Gastroenterology — MCQs

Gastroenterology — MCQs

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