Gastroenterology Practice Questions

Q: In which of the following conditions is uniform dilation of the esophagus seen?

Achalasia cardia. **Explanation:** **Achalasia Cardia (Correct Answer):** Achalasia is a primary esophageal motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax and the absence of peristalsis in the distal esophagus [1]. This is due to the degeneration of the **myenteric (Auerbach’s plexus)**. Because the LES remains tonically contracted, food and liquid accumulate, leading to progressive, **uniform, and massive dilation** of the esophageal body (often called a "Mega-esophagus") [1]. On a Barium swallow, this presents as the classic **"Bird’s beak"** appearance. **Why other options are incorrect:** * **Scleroderma (Systemic Sclerosis):** While Scleroderma involves the esophagus in 80% of cases, it causes atrophy of the smooth muscle and a **patulous (incompetent) LES** [1]. This leads to severe GERD and strictures. While the esophagus may appear mildly dilated due to aperistalsis, it is typically not the massive, uniform dilation seen in Achalasia. * **Dermatomyositis:** This condition primarily affects the **striated muscle** of the proximal (upper) third of the esophagus and the pharynx [1]. It leads to oropharyngeal dysphagia and aspiration rather than distal esophageal dilation. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis). * **Heller’s Myotomy:** The surgical treatment of choice (usually performed with a Dor/Toupet fundoplication). * **Chagas Disease:** A secondary cause of Achalasia caused by *Trypanosoma cruzi*. * **Sigmoid Esophagus:** The term used for the advanced, tortuous dilation seen in end-stage Achalasia.

Q: What is the drug of choice for an acute exacerbation of ulcerative colitis?

Steroids. **Explanation:** The management of Ulcerative Colitis (UC) is divided into two phases: **Induction of remission** (treating acute flares) and **Maintenance of remission** [2]. **Why Steroids are the Correct Answer:** Systemic corticosteroids (e.g., oral Prednisolone or IV Hydrocortisone/Methylprednisolone) are the **drugs of choice for inducing remission** in an acute moderate-to-severe exacerbation [1]. They possess potent anti-inflammatory properties that rapidly suppress the immune response. However, they have no role in maintenance therapy due to significant long-term side effects. **Analysis of Incorrect Options:** * **A & B (Sulfasalazine/Mesalazine):** These are 5-ASA (Aminosalicylates) compounds. While they are the drug of choice for **maintaining remission** and treating **mild** UC, they are insufficient as monotherapy for a significant acute exacerbation [1]. * **D (NSAIDs):** These are strictly **contraindicated** in patients with Inflammatory Bowel Disease (IBD) as they can precipitate or worsen an acute flare by inhibiting protective prostaglandins in the gut mucosa. **High-Yield Clinical Pearls for NEET-PG:** * **Route of Administration:** For severe cases (Truelove and Witts criteria), **IV steroids** are the initial treatment. If there is no response in 3–5 days, switch to "rescue therapy" with **Infliximab** or **Cyclosporine**. * **Distal Disease:** For proctitis or distal colitis, **topical (rectal) steroids or 5-ASAs** are preferred over systemic therapy [1]. * **Monitoring:** Always rule out *Clostridioides difficile* and CMV infection in a patient presenting with a refractory acute flare. * **Surgery:** Total proctocolectomy with Ileal Pouch-Anal Anastomosis (IPAA) is curative for UC [3].

Q: A 50-year-old male executive presents to the casualty department with hematemesis. He reports vomiting all the food he had consumed prior to the hematemesis, followed by forceful retching. He had consumed alcohol the previous day. What is the most probable diagnosis?

Mallory-Weiss tear. ### Explanation **Correct Option: C. Mallory-Weiss tear** **Reasoning:** The clinical hallmark of a **Mallory-Weiss tear (MWT)** is hematemesis following an initial episode of non-bloody vomiting or forceful retching [1]. The pathophysiology involves a longitudinal mucosal laceration at the **gastroesophageal junction** or distal esophagus, caused by a sudden increase in intra-abdominal pressure. This case is classic: the patient first vomited food, followed by forceful retching (increasing pressure), which then led to the tear and subsequent hematemesis. Alcohol consumption is a common predisposing factor as it induces gastric irritation and vomiting. **Why other options are incorrect:** * **Gastritis:** While alcohol can cause erosive gastritis, it typically presents with epigastric pain and coffee-ground emesis rather than brisk hematemesis following a specific sequence of non-bloody vomiting. * **Duodenal Ulcer:** This usually presents with chronic dyspepsia (relieved by food) and melena [2]. While it can cause hematemesis, it is not typically preceded by the "vomiting-then-retching" sequence. * **Esophageal Varices:** This usually presents as massive, painless hematemesis in a patient with signs of chronic liver disease (e.g., splenomegaly, jaundice). There is no characteristic preceding non-bloody vomit. **NEET-PG High-Yield Pearls:** * **Location:** Most tears (approx. 75%) occur just below the GE junction in the gastric mucosa. * **Diagnosis:** **Upper GI Endoscopy** is the gold standard (shows a linear mucosal tear). * **Management:** Most cases (80-90%) stop bleeding spontaneously with supportive care (PPIs, fluids) [1]. If persistent, endoscopic therapy (clips or epinephrine) is used. * **Distinction:** Do not confuse MWT with **Boerhaave Syndrome**, which is a *transmural* perforation of the esophagus (presents with Mackler’s triad: vomiting, chest pain, and subcutaneous emphysema).

Q: A patient presents with fasting blood sugar of 167 mg/dl, skin pigmentation, and hypogonadism. Liver enzymes show SGOT as 670 and SGPT as 690. Which of the following is the most likely diagnosis?

Hemochromatosis. **Explanation:** The clinical triad of **Diabetes Mellitus** (fasting blood sugar 167 mg/dl), **Skin Pigmentation** (often described as "bronzed"), and **Cirrhosis/Liver Dysfunction** (elevated SGOT/SGPT) is the classic presentation of **Hereditary Hemochromatosis**, often referred to as **"Bronze Diabetes."** [1] **Why Hemochromatosis is correct:** Hemochromatosis is an iron-overload disorder where excessive iron (hemosiderin) deposits in various organs: * **Pancreas:** Damage to islet cells leads to secondary Diabetes Mellitus. [1] * **Skin:** Iron deposition and increased melanin production cause hyperpigmentation. [1] * **Liver:** Iron accumulation leads to hepatomegaly, elevated enzymes, and eventually cirrhosis. [1] * **Pituitary/Gonads:** Iron deposition in the pituitary leads to hypogonadotropic **hypogonadism** (presenting as decreased libido or impotence). [1] **Why other options are incorrect:** * **Alpha-1 Antitrypsin Deficiency:** Primarily presents with panacinar emphysema and liver cirrhosis, but does not typically cause diabetes or significant skin pigmentation. * **Wilson's Disease:** A disorder of copper metabolism. While it causes liver disease, it is characterized by neuropsychiatric symptoms and **Kayser-Fleischer (KF) rings**, not diabetes and bronzing. * **Glycogen Storage Disease:** These typically present in childhood with hypoglycemia, hepatomegaly, and growth retardation, rather than the adult-onset triad of diabetes and pigmentation. **NEET-PG High-Yield Pearls:** * **Gene Mutation:** Most commonly the **HFE gene** (C282Y mutation) on Chromosome 6. [1] * **Screening Test:** Transferrin saturation (best initial test; >45% is suggestive). * **Gold Standard Diagnosis:** Liver biopsy with Prussian Blue staining (Perl’s stain). * **Treatment:** Therapeutic phlebotomy is the mainstay of management. * **Cardiac Involvement:** Can lead to restrictive or dilated cardiomyopathy.

Q: Zollinger-Ellison syndrome is characterized by the following except?

Hypocalcemia. **Explanation:** Zollinger-Ellison Syndrome (ZES) is caused by a gastrin-secreting neuroendocrine tumor (gastrinoma), typically located in the "gastrinoma triangle." **Why Hypocalcemia is the Correct Answer:** Hypocalcemia is **not** a feature of ZES. In fact, approximately 25% of ZES cases occur as part of **Multiple Endocrine Neoplasia type 1 (MEN1)**. In these patients, ZES is associated with primary hyperparathyroidism, which leads to **hypercalcemia**, not hypocalcemia. Hypercalcemia can further stimulate gastrin release, worsening the symptoms. **Analysis of Incorrect Options:** * **Profound gastric hypersecretion:** Gastrinomas secrete excessive gastrin, which acts on parietal cells to produce massive amounts of hydrochloric acid. This leads to refractory peptic ulcers. * **Large diarrhea with occasional steatorrhea:** The high acid volume overwhelms the small intestine. Steatorrhea occurs because the low pH inactivates pancreatic lipases and causes the precipitation of bile acids, leading to fat malabsorption. * **Hypergastrinemia:** This is the biochemical hallmark of ZES. Elevated fasting serum gastrin levels (typically >1000 pg/mL) in the presence of gastric acid (pH <2) confirm the diagnosis. **High-Yield Clinical Pearls for NEET-PG:** 1. **Diagnosis:** The most sensitive and specific provocative test is the **Secretin Stimulation Test** (Secretin causes a paradoxical rise in gastrin in ZES). 2. **Location:** Most gastrinomas are found in the **Gastrinoma Triangle** (bounded by the cystic duct, junction of the 2nd/3rd parts of the duodenum, and the neck of the pancreas). 3. **MEN1 Association:** Always screen for Hyperparathyroidism and Pituitary adenomas if ZES is diagnosed. 4. **Treatment:** High-dose Proton Pump Inhibitors (PPIs) and surgical resection of the tumor.

Q: Which drug can cause complete histopathological resolution in patients with hepatitis B?

Entecavir. The primary goal of treating Chronic Hepatitis B (CHB) is to prevent disease progression to cirrhosis and hepatocellular carcinoma. **Entecavir (Option C)** is a potent nucleoside analogue that inhibits HBV DNA polymerase [1]. Long-term therapy with Entecavir (and Tenofovir) not only achieves profound viral suppression and biochemical normalization but has been clinically proven to result in **histological improvement** and **regression of fibrosis/cirrhosis** [1]. Studies (notably by Chang et al.) demonstrated that long-term Entecavir treatment leads to a reduction in the Ishak fibrosis score and can result in near-complete histopathological resolution of necroinflammation. **Why other options are incorrect:** * **Cyclosporin (Option A):** This is an immunosuppressant used in transplants and autoimmune conditions. It does not have antiviral activity against HBV; in fact, immunosuppressants can trigger **HBV reactivation**, leading to fulminant hepatic failure. * **Prednisolone (Option B):** Corticosteroids suppress the immune response. While they might transiently lower transaminases, they increase viral replication. Withdrawal of steroids can cause a "transaminase flare" and does not lead to histopathological resolution of the underlying viral infection. **High-Yield Pearls for NEET-PG:** * **First-line agents for CHB:** Entecavir, Tenofovir (TDF/TAF), and Pegylated Interferon-alpha [2]. * **Entecavir's niche:** It is preferred in patients with renal impairment (over TDF) but has a high failure rate in patients already resistant to Lamivudine (due to shared resistance pathways). * **Histological "Reversal":** HBV is one of the few conditions where established cirrhosis is considered potentially reversible with long-term, effective antiviral therapy. * **Monitoring:** The most sensitive indicator of treatment response is the disappearance of HBV DNA (Viral Load) [3].

Q: What is the most common cause of chronic pancreatitis?

Alcohol. **Explanation:** **1. Correct Answer: A. Alcohol** Alcohol consumption is the **most common cause** of chronic pancreatitis worldwide, accounting for approximately 70–80% of cases in adults [1]. The pathophysiology involves the "toxic-metabolic" effect of ethanol, which increases the protein concentration of pancreatic secretions. This leads to the formation of protein plugs, which subsequently calcify (forming stones), causing ductal obstruction, chronic inflammation, and irreversible parenchymal fibrosis [1]. **2. Analysis of Incorrect Options:** * **B. Gallstones:** While gallstones are the **most common cause of acute pancreatitis**, they rarely cause chronic pancreatitis. Chronic pancreatitis requires long-term, repeated injury; gallstones typically cause discrete, episodic obstructive events. * **C. Tropical pancreatitis:** This is a specific form of idiopathic juvenile chronic calcific pancreatitis seen in developing countries (like parts of Southern India) [1]. While significant in certain demographics, it is not as common globally or nationally as alcoholic pancreatitis. * **D. ERCP:** Endoscopic Retrograde Cholangiopancreatography is a common cause of **iatrogenic acute pancreatitis**, but it does not lead to the chronic, progressive fibro-inflammatory changes seen in chronic pancreatitis. **3. NEET-PG High-Yield Pearls:** * **Classic Triad:** Pancreatic calcifications (most specific), steatorrhea, and diabetes mellitus (found in only 20-30% of patients). * **Most common symptom:** Epigastric pain radiating to the back [1]. * **Investigation of Choice:** **MRCP** is the most sensitive non-invasive test; **CT scan** is best for visualizing calcifications [1]. * **TIGAR-O Classification:** A mnemonic for etiologies (Toxic-metabolic, Idiopathic, Genetic, Autoimmune, Recurrent/Severe acute, Obstructive). * **Smoking:** Now recognized as an independent risk factor that acts synergistically with alcohol [1].

Question 1

In which of the following conditions is uniform dilation of the esophagus seen?

Accepted Answer

Achalasia cardia

Answer

Scleroderma

Answer

Dermatomyositis

Answer

All

Question 2

What is the drug of choice for an acute exacerbation of ulcerative colitis?

Accepted Answer

Steroids

Answer

Sulfasalazine

Answer

Mesalazine

Answer

NSAIDs

Question 3

A 50-year-old male executive presents to the casualty department with hematemesis. He reports vomiting all the food he had consumed prior to the hematemesis, followed by forceful retching. He had consumed alcohol the previous day. What is the most probable diagnosis?

Accepted Answer

Mallory-Weiss tear

Answer

Gastritis

Answer

Duodenal ulcer

Answer

Esophageal varices

Question 4

Gastroesophageal reflux disease (GERD) in the absence of endoscopic esophagitis is seen in which of the following conditions?

Accepted Answer

Partially treated cases with proton pump inhibitors (PPIs)

Answer

Scleroderma

Answer

Chronic renal failure (CRF)

Answer

Cirrhosis

Question 5

All of the following are true regarding carcinoid syndrome, EXCEPT:

Accepted Answer

Serotonin appears to be involved in the flushing symptoms.

Answer

Flushing associated with it affects the upper part of the body.

Answer

Tricuspid regurgitation is the most common cardiac lesion.

Answer

Midgut carcinoids account for 60-70% of cases of carcinoid syndrome.

Question 6

Ascitic fluid with a Transudate Serum-Ascites Albumin Gradient (SAAG) and low albumin is found in which of the following conditions?

Accepted Answer

Congestive Heart Failure (CHF)

Answer

Tuberculosis

Answer

Cirrhosis

Answer

Pancreatitis

Question 7

A patient presents with fasting blood sugar of 167 mg/dl, skin pigmentation, and hypogonadism. Liver enzymes show SGOT as 670 and SGPT as 690. Which of the following is the most likely diagnosis?

Accepted Answer

Hemochromatosis

Answer

Alpha-1 Antitrypsin Deficiency

Answer

Wilson's Disease

Answer

Glycogen Storage Disease

Question 8

Zollinger-Ellison syndrome is characterized by the following except?

Accepted Answer

Hypocalcemia

Answer

Profound gastric hypersecretion

Answer

Large diarrhea with occasional steatorrhea

Answer

Hypergastrinemia

Question 9

Which drug can cause complete histopathological resolution in patients with hepatitis B?

Accepted Answer

Entecavir

Answer

Cyclosporin

Answer

Prednisolone

Answer

None of the above

Question 10

What is the most common cause of chronic pancreatitis?

Accepted Answer

Alcohol

Answer

Gallstones

Answer

Tropical pancreatitis

Answer

ERCP

Gastroenterology — MCQs

Gastroenterology — MCQs

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