Gastroenterology Practice Questions

Q: What is the most common extraintestinal manifestation of Inflammatory Bowel Disease?

Rheumatological. **Explanation:** Extraintestinal manifestations (EIMs) occur in approximately 25–40% of patients with Inflammatory Bowel Disease (IBD). **Rheumatological manifestations** are the most common EIM, affecting up to 30% of patients [1]. These are broadly categorized into: 1. **Peripheral Arthritis:** Usually non-deforming and asymmetrical. Type I (pauciarticular) correlates with bowel activity, while Type II (polyarticular) runs an independent course. 2. **Axial Arthropathy:** Includes ankylosing spondylitis and sacroiliitis, which are HLA-B27 associated and progress independently of the bowel disease [1], [2]. **Analysis of Incorrect Options:** * **Dermatological (Option A):** These are the second most common EIMs. Key examples include Erythema Nodosum (correlates with bowel activity) and Pyoderma Gangrenosum (often runs an independent course). * **Metabolic Bone Disease (Option C):** While Osteoporosis and Osteomalacia are common due to chronic corticosteroid use and malabsorption (especially in Crohn’s), they are considered secondary complications rather than the primary inflammatory EIM. * **Hepatobiliary (Option D):** These are less frequent but highly specific. Primary Sclerosing Cholangitis (PSC) is the most notable, occurring more commonly in Ulcerative Colitis than in Crohn’s Disease. **High-Yield Clinical Pearls for NEET-PG:** * **Most common EIM overall:** Peripheral Arthritis. * **Most common ocular manifestation:** Episcleritis (correlates with bowel activity); Uveitis is more severe and requires urgent referral [2]. * **HLA Association:** HLA-B27 is strongly linked to axial involvement in IBD [2]. * **PSC and UC:** 70–80% of patients with PSC have underlying UC, but only 5% of UC patients develop PSC.

Q: All of the following are true about Zollinger-Ellison syndrome, except?

Pyloric antral tumor. Zollinger-Ellison Syndrome (ZES) is caused by a gastrin-secreting neuroendocrine tumor known as a **Gastrinoma**. **Why Option C is the correct answer (The Exception):** Gastrinomas are most commonly located in the **"Gastrinoma Triangle"** (Passaro’s Triangle), which is bounded by the junction of the cystic and common bile ducts, the junction of the second and third portions of the duodenum, and the junction of the neck and body of the pancreas. The most common site for a primary gastrinoma is the **duodenum** (40-50%), followed by the **pancreas**. They are **not** typically found in the pyloric antrum of the stomach. **Analysis of other options:** * **Option A (Recurrent peptic ulcers):** True. Excessive gastrin causes massive hypersecretion of gastric acid, leading to multiple, refractory, and recurrent ulcers, often in atypical locations like the distal duodenum or jejunum. * **Option B (High levels of gastrin):** True. Hypergastrinemia (>1000 pg/mL) is the biochemical hallmark of ZES. * **Option D (Basal acid output >15 mEq/L):** True. A Basal Acid Output (BAO) >15 mEq/h (in patients with an intact stomach) is a diagnostic criterion for ZES. **NEET-PG High-Yield Pearls:** * **Screening Test:** Fasting Serum Gastrin (FSG) levels (should be >10 times the upper limit). * **Confirmatory Test:** Secretin Stimulation Test (Secretin paradoxically increases gastrin levels in ZES). * **Association:** Approximately 25% of ZES cases are associated with **Multiple Endocrine Neoplasia type 1 (MEN1)**. * **Most common symptom:** Abdominal pain (due to PUD), followed by **diarrhea** (due to mucosal damage and inactivation of pancreatic enzymes by low pH).

Q: Which of the following describes non-progressive contractions of the esophagus?

Tertiary. **Explanation:** The correct answer is **Tertiary contractions**. Esophageal motility is categorized into three distinct types based on the trigger and the nature of the wave: 1. **Tertiary Contractions (Correct):** These are non-propulsive, non-progressive, and uncoordinated waves that occur simultaneously at different levels of the esophagus [2]. They are considered dysfunctional and do not aid in bolus transport. On a barium swallow, they produce the characteristic **"Corkscrew esophagus"** or **"Rosary bead esophagus."** They are commonly seen in conditions like Diffuse Esophageal Spasm (DES) and in the elderly ("Presbyesophagus") [2]. 2. **Primary Contractions (Incorrect):** These are normal, progressive peristaltic waves initiated by the act of swallowing (deglutition). They travel from the upper esophagus to the Lower Esophageal Sphincter (LES) to move the food bolus. 3. **Secondary Contractions (Incorrect):** These are also progressive and normal. They are not triggered by swallowing but by local distension of the esophagus (e.g., a retained food bolus or acid reflux). They serve as a "clearing" mechanism. 4. **Quaternary (Incorrect):** This is not a standard physiological term used to describe esophageal motility patterns. **High-Yield Clinical Pearls for NEET-PG:** * **Diffuse Esophageal Spasm (DES):** Presents with intermittent chest pain and dysphagia [2]. Manometry shows high-amplitude, non-peristaltic (tertiary) contractions [2]. * **Nutcracker Esophagus:** Characterized by high-pressure (over 180 mmHg) but **progressive** (peristaltic) contractions [2]. * **Barium Swallow Tip:** If you see "Corkscrew esophagus," think Tertiary contractions/DES [1]. If you see "Bird’s beak appearance," think Achalasia Cardia [1].

Q: Which of the following statements regarding ulcerative colitis is true?

Smoking has a protective effect.. The relationship between smoking and Inflammatory Bowel Disease (IBD) is a classic high-yield topic for NEET-PG. In **Ulcerative Colitis (UC)**, smoking is famously associated with a **protective effect** [1]. **1. Why Option A is correct:** Epidemiological studies consistently show that UC is primarily a disease of non-smokers and ex-smokers. The risk of developing UC is significantly lower in active smokers compared to those who have never smoked. Furthermore, patients who smoke often experience a milder disease course with fewer relapses and a decreased need for colectomy. While the exact mechanism is not fully understood, it is hypothesized that nicotine or other components in tobacco smoke increase colonic mucus production and modify the immune response in the gut mucosa [1]. **2. Why other options are incorrect:** * **Options B & C:** These are incorrect because there is a well-documented, statistically significant inverse relationship between smoking and UC. * **Option D:** Smoking does not cause relapses in UC; in fact, many patients report a **flare-up of symptoms immediately after smoking cessation** [3]. **Clinical Pearls for NEET-PG:** * **The IBD Paradox:** While smoking is **protective in Ulcerative Colitis**, it is a major **risk factor for Crohn’s Disease**, where it increases the risk of strictures, fistulae, and post-operative recurrence. * **Appendectomy:** Similar to smoking, a history of appendectomy at a young age (for true appendicitis) is also protective against the development of Ulcerative Colitis. * **Treatment:** Although smoking is protective, it is never recommended as a therapy due to its systemic health risks. However, nicotine patches have been studied as an adjunctive treatment for active UC with varying results [2].

Q: Which of the following does not lead to chronic liver disease?

Hepatitis A. **Explanation:** The core concept tested here is the natural history of viral hepatitides. **Hepatitis A Virus (HAV)** is an RNA virus transmitted via the fecal-oral route. It causes acute, self-limiting hepatitis but **never** progresses to chronic liver disease or a carrier state [1]. Once the acute infection resolves, the patient develops lifelong immunity (anti-HAV IgG) [1]. **Analysis of Options:** * **Hepatitis A (Correct):** As mentioned, HAV (and Hepatitis E, except in immunocompromised/transplant patients) does not cause chronicity [1]. * **Hepatitis B (Incorrect):** HBV is a classic cause of chronic liver disease [2]. The risk of chronicity is inversely proportional to age (90% in neonates, <5% in adults). * **EBV / Infectious Mononucleosis (Incorrect):** While Epstein-Barr Virus (EBV) primarily causes acute hepatitis as part of the Infectious Mononucleosis syndrome, it is a known cause of **chronic active hepatitis** and can lead to cirrhosis in rare, severe cases or in patients with Chronic Active EBV infection (CAEBV) [1]. *Note: In many standard MCQ formats, EBV is considered a potential cause of chronic inflammation, making HAV the "most correct" answer as it has zero chronicity potential.* **High-Yield Clinical Pearls for NEET-PG:** * **Vowels to the Bowels:** Hepatitis **A** and **E** are fecal-oral and do not cause chronic disease (Exception: HEV Genotype 3 in transplant patients). * **Consonants to the Blood:** Hepatitis **B, C, and D** are parenteral and cause chronic liver disease/cirrhosis [1]. * **Hepatitis B:** The most common cause of Hepatocellular Carcinoma (HCC) worldwide. * **Hepatitis C:** The most common cause of chronic liver disease leading to liver transplantation in the West [3].

Q: Hepatic encephalopathy is caused by an increase of -

Ammonia. **Explanation:** **Hepatic Encephalopathy (HE)** is a reversible neuropsychiatric syndrome occurring in patients with acute or chronic liver failure [1]. It is primarily caused by the liver's inability to detoxify nitrogenous waste products [2]. **1. Why Ammonia is Correct:** Ammonia ($NH_3$) is the primary neurotoxin implicated in HE [1]. It is produced by intestinal bacteria through the breakdown of proteins and urea. In a healthy liver, ammonia is converted into urea via the **Urea Cycle**. In liver failure or portosystemic shunting, ammonia bypasses the liver and crosses the blood-brain barrier [2]. In the brain, astrocytes attempt to detoxify ammonia by combining it with **Glutamate** to form **Glutamine** (via Glutamine Synthetase). The resulting osmotic buildup of glutamine leads to astrocyte swelling and cerebral edema. **2. Why Other Options are Incorrect:** * **Urea:** This is the non-toxic end product of ammonia metabolism. High urea (Uremia) causes encephalopathy in renal failure, not hepatic failure. * **Glutamate:** Glutamate is an excitatory neurotransmitter. In HE, glutamate levels actually **decrease** because it is consumed to produce glutamine. * **Fatty Acids:** While short-chain fatty acids may play a synergistic role in neurotoxicity, they are not the primary causative agent. **NEET-PG High-Yield Pearls:** * **Clinical Sign:** **Asterixis** (flapping tremors) is the hallmark of Grade II HE. * **EEG Finding:** Characteristic **triphasic waves**. * **Treatment of Choice:** **Lactulose** (acidifies the gut to convert $NH_3$ to non-absorbable $NH_4^+$) and **Rifaximin** (reduces ammonia-producing gut bacteria). * **Precipitating Factors:** GI bleed (increases protein load), infections (SBP), hypokalemia, and constipation.

Q: Which of the following is NOT a complication of enteral feeding?

Hypoglycemia. Enteral nutrition (EN) involves delivering nutrients directly into the gastrointestinal tract. While it is generally safer than parenteral nutrition, it is associated with specific gastrointestinal, mechanical, and metabolic complications [1]. **Hypoglycemia** is not a standard complication of enteral feeding. In fact, **hyperglycemia** is the common metabolic complication seen in patients receiving EN, often due to the high carbohydrate load, underlying stress response, or insulin resistance in critically ill patients. Hypoglycemia typically only occurs if enteral feeding is abruptly stopped without adjusting insulin doses or in cases of "dumping syndrome" (reactive hypoglycemia) following gastric surgery. **Diarrhea (A):** The most common gastrointestinal complication of EN (occurring in up to 30% of patients). It is usually caused by high osmolarity of the formula, rapid infusion rates, or concomitant antibiotic use (e.g., *C. difficile*). **Constipation (B):** Frequently occurs due to low fiber content in standard formulas, inadequate fluid intake, or the use of opioid medications in hospitalized patients. **Aspiration Pneumonia (D):** The most serious respiratory complication. Risk factors include a supine position (head of bed <30°), high gastric residual volumes, and impaired gag reflex. **Refeeding Syndrome:** A life-threatening metabolic complication occurring when feeding is restarted in severely malnourished patients. Look for **Hypophosphatemia** (hallmark), hypokalemia, and hypomagnesemia. **Prevention of Aspiration:** Keep the head of the bed elevated to **30–45 degrees**. **Preferred Route:** Enteral feeding is always preferred over parenteral feeding ("If the gut works, use it") because it maintains the intestinal mucosal barrier and prevents bacterial translocation.

Q: Which of the following conditions is associated with mucinous ascites?

Stomach carcinoma. The explanation with [1], [2] inline citations added: **Mucinous ascites** (also known as gelatinous ascites) occurs when mucin-producing cells seed the peritoneal cavity, leading to the accumulation of thick, semi-solid fluid. This condition is most commonly associated with **Pseudomyxoma Peritonei**, which typically arises from mucinous tumors of the **appendix** or **ovary**. However, among the given options, **Stomach carcinoma** (specifically the signet-ring cell type or mucinous adenocarcinoma) is a well-recognized cause of peritoneal carcinomatosis that can lead to mucinous ascites [1]. **Analysis of Options:** * **Stomach carcinoma (Correct):** Advanced gastric malignancies can spread to the peritoneum. If the primary tumor is a mucinous adenocarcinoma, it secretes abundant mucus into the peritoneal space, resulting in mucinous ascites. * **Tuberculosis:** Characteristically causes **exudative ascites** with high protein (>3g/dL), high SAAG ( 1.1) due to portal hypertension [2]. **NEET-PG High-Yield Pearls:** * **Pseudomyxoma Peritonei:** Classically described as "Jelly Belly." The most common primary site is the **Appendix**. * **SAAG (Serum-Ascites Albumin Gradient):** The most reliable marker to differentiate portal hypertensive (>1.1) from non-portal hypertensive (<1.1) causes [2]. * **Chylous Ascites:** Milky fluid (high triglycerides) seen in lymphomas or thoracic duct obstruction. * **Signet-ring cells:** Pathognomonic histological finding in certain gastric cancers that can lead to Krukenberg tumors and mucinous spread.

Question 1

What is the best medical therapy for radiation proctitis among the following?

Accepted Answer

Sucralfate enema

Answer

Formalin application

Answer

5-Aminosalicylic acid enema

Answer

Steroid enema

Question 2

What is the most common extraintestinal manifestation of Inflammatory Bowel Disease?

Accepted Answer

Rheumatological

Answer

Dermatological

Answer

Metabolic bone disease

Answer

Hepatobiliary

Question 3

All of the following are true about Zollinger-Ellison syndrome, except?

Accepted Answer

Pyloric antral tumor

Answer

Recurrent peptic ulcers

Answer

High levels of gastrin

Answer

Basal acid output more than 15 mEq/L

Question 4

Crohn's disease is associated with which one of the following infectious agents?

Accepted Answer

Clostridium difficile

Answer

Mycobacterium paratuberculosis

Answer

Cytomegalovirus (CMV)

Answer

Mycoplasma

Question 5

Which of the following describes non-progressive contractions of the esophagus?

Accepted Answer

Tertiary

Answer

Primary

Answer

Secondary

Answer

Quaternary

Question 6

Which of the following statements regarding ulcerative colitis is true?

Accepted Answer

Smoking has a protective effect.

Answer

Smoking does not have a protective effect.

Answer

There is no relation to smoking.

Answer

Smoking causes relapses.

Question 7

Which of the following does not lead to chronic liver disease?

Accepted Answer

Hepatitis A

Answer

EBV

Answer

Infectious mononucleosis

Answer

Hepatitis B

Question 8

Hepatic encephalopathy is caused by an increase of -

Accepted Answer

Ammonia

Answer

Urea

Answer

Glutamate

Answer

Fatty acid

Question 9

Which of the following is NOT a complication of enteral feeding?

Accepted Answer

Hypoglycemia

Answer

Diarrhea

Answer

Constipation

Answer

Aspiration pneumonia

Question 10

Which of the following conditions is associated with mucinous ascites?

Accepted Answer

Stomach carcinoma

Answer

Tuberculosis

Answer

Nephrotic syndrome

Answer

Cirrhosis

Gastroenterology — MCQs

Gastroenterology — MCQs

On this page

Practice by Chapter

Want unlimited practice?