Gastroenterology Practice Questions

Q: An alcoholic patient presented with heartburn and was diagnosed with esophagitis. What is the MOST common cause of esophagitis?

Esophageal reflux. **Explanation:** The most common cause of esophagitis worldwide, regardless of predisposing habits like alcohol consumption, is **Gastroesophageal Reflux Disease (GERD)** [1]. 1. **Why Esophageal Reflux is Correct:** Reflux esophagitis occurs due to the retrograde flow of gastric acid and pepsin into the esophagus, leading to mucosal injury [1]. While alcohol is a known risk factor because it relaxes the **Lower Esophageal Sphincter (LES)** and has a direct toxic effect on the mucosa, the actual pathological process causing the inflammation in this clinical scenario is the resulting acid reflux. 2. **Why Other Options are Incorrect:** * **Alcohol (A) & Smoking (B):** These are significant *risk factors* or "triggers" rather than the primary cause [2]. They exacerbate esophagitis by decreasing LES pressure and impairing esophageal clearance, but they do not cause esophagitis as frequently as chronic acid reflux does. * **Spicy and Hot Food (C):** These act as dietary irritants that can cause transient "pill-induced" style irritation or worsen existing symptoms (heartburn), but they are rarely the primary underlying cause of chronic esophagitis. **NEET-PG High-Yield Pearls:** * **Most common symptom of GERD:** Heartburn (Pyrosis) [1]. * **Gold Standard Investigation for GERD:** 24-hour ambulatory pH monitoring. * **Most common histological finding in GERD:** Eosinophils and neutrophils in the squamous epithelium, basal cell hyperplasia, and elongation of dermal papillae. * **Complication to watch:** Barrett’s Esophagus (Metaplasia: Squamous to Columnar), which increases the risk of **Adenocarcinoma** [2].

Q: What is a characteristic feature of jejunal diverticula?

Impaired vitamin B12 absorption. ### Explanation **Correct Answer: C. Impaired vitamin B12 absorption** Jejunal diverticula are typically **acquired, false diverticula** (consisting only of mucosa and submucosa) that occur on the mesenteric border. The primary clinical significance of multiple jejunal diverticula is their association with **Small Intestinal Bacterial Overgrowth (SIBO)**. The stagnant loop within the diverticula promotes the proliferation of anaerobic bacteria. These bacteria compete with the host for nutrients; specifically, they **deconjugate bile salts** and **consume Vitamin B12** (cyanocobalamin) before it can reach the terminal ileum for absorption. This leads to megaloblastic anemia and malabsorption. **Analysis of Incorrect Options:** * **A & B: Impaired folate and ferritin absorption:** Folate and iron (ferritin) are primarily absorbed in the proximal small intestine (duodenum and proximal jejunum). In SIBO, bacteria actually **synthesize folate**, often leading to *elevated* serum folate levels. Therefore, folate deficiency is not a feature. * **D: Positive urea breath test:** This test is specific for detecting *Helicobacter pylori* infection in the stomach, as *H. pylori* produces urease. It is not used to diagnose jejunal diverticula or SIBO (where Glucose or Lactulose breath tests are preferred). **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Occur on the **mesenteric border** (where vasa recta enter the muscularis). * **Triad of Complications:** Malabsorption (B12 deficiency), Diverticulitis, and Perforation/Obstruction. * **Diagnosis:** Often an incidental finding on CT or Enteroclysis; SIBO is confirmed via **Glucose Hydrogen Breath Test**. * **Treatment:** Asymptomatic cases require no treatment. SIBO is managed with antibiotics (e.g., Rifaximin); surgery is reserved for complications like perforation.

Q: A patient with chronic alcohol abuse is admitted with liver failure. What change associated with liver failure necessitates close monitoring of the patient's blood pressure?

Hypoalbuminemia. **Explanation:** In patients with chronic liver failure (cirrhosis), the liver's synthetic function is severely impaired, leading to **hypoalbuminemia** [1]. Albumin is the primary protein responsible for maintaining **plasma oncotic pressure** [3]. When albumin levels drop, the oncotic pressure within the intravascular compartment decreases, causing fluid to shift from the blood vessels into the interstitial space (third-spacing), resulting in ascites and peripheral edema [1], [3]. This reduction in effective intravascular volume can lead to **hypotension** and circulatory collapse, necessitating close blood pressure monitoring [2]. **Analysis of Incorrect Options:** * **B. Increased capillary permeability:** While seen in sepsis or systemic inflammatory response syndrome (SIRS), it is not the primary pathophysiological mechanism of fluid shift in chronic liver failure. * **C. Abnormal peripheral vasodilation:** While splanchnic and peripheral vasodilation occur in cirrhosis (due to nitric oxide release), the question specifically links the change to a direct consequence of liver synthetic failure [1]. Hypoalbuminemia is the classic hallmark of synthetic failure. * **D. Excess renin release:** In liver failure, the Renin-Angiotensin-Aldosterone System (RAAS) is activated as a *compensatory response* to low effective arterial volume [2]. It is a result of the hemodynamic change, not the primary cause necessitating BP monitoring. **NEET-PG High-Yield Pearls:** * **Serum Albumin:** A key marker of the liver's **synthetic function** (along with PT/INR) [1]. * **Serum-Ascites Albumin Gradient (SAAG):** A SAAG >1.1 g/dL indicates portal hypertension (e.g., Cirrhosis, Budd-Chiari). * **Albumin Infusion:** Used clinically in cirrhosis for Large Volume Paracentesis (>5L) and Spontaneous Bacterial Peritonitis (SBP) to prevent post-paracentesis circulatory dysfunction and hepatorenal syndrome [2].

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.

Question 1

An alcoholic patient presented with heartburn and was diagnosed with esophagitis. What is the MOST common cause of esophagitis?

Accepted Answer

Esophageal reflux

Answer

Alcohol

Answer

Smoking

Answer

Spicy and hot food

Question 2

What is a characteristic feature of jejunal diverticula?

Accepted Answer

Impaired vitamin B12 absorption

Answer

Impaired folate absorption

Answer

Impaired ferritin absorption

Answer

Positive urea breath test

Question 3

A patient with chronic alcohol abuse is admitted with liver failure. What change associated with liver failure necessitates close monitoring of the patient's blood pressure?

Accepted Answer

Hypoalbuminemia

Answer

Increased capillary permeability

Answer

Abnormal peripheral vasodilation

Answer

Excess renin release from the kidneys

Question 4

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

Accepted Answer

Achalasia cardia

Answer

Scleroderma

Answer

Dermatomyositis

Answer

All

Question 5

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

Accepted Answer

Steroids

Answer

Sulfasalazine

Answer

Mesalazine

Answer

NSAIDs

Question 6

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 7

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 8

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 9

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 10

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

Gastroenterology — MCQs

Gastroenterology — MCQs

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