Gastroenterology Practice Questions

Q: Albumin treatment along with antibiotics in the setting of spontaneous bacterial peritonitis (SBP) is indicated to prevent the development of hepatorenal syndrome, EXCEPT in which of the following situations?

International Normalized Ratio (INR) > 2. In Spontaneous Bacterial Peritonitis (SBP), the administration of intravenous albumin (1.5 g/kg on day 1 and 1.0 g/kg on day 3) significantly reduces the risk of renal failure and mortality. However, according to the **AASLD guidelines**, albumin is specifically indicated only if certain biochemical thresholds are met, as it provides the most benefit to high-risk patients. **Explanation of Options:** The criteria for administering albumin in SBP are: 1. **Serum Creatinine > 1 mg/dL** (Option A) 2. **Blood Urea Nitrogen (BUN) > 30 mg/dL** (Option B) 3. **Total Bilirubin > 4 mg/dL** (Option C) If a patient meets any of the above criteria, albumin is mandatory [1]. **INR > 2 (Option D)** is a marker of impaired synthetic function and severity of cirrhosis (MELD score), but it is **not** a validated criterion for initiating albumin therapy in SBP. **Why Albumin?** SBP causes systemic vasodilation and a decrease in effective arterial blood volume, leading to Hepatorenal Syndrome (HRS). Albumin acts as a plasma expander and has antioxidant properties that protect renal perfusion [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis of SBP:** Absolute Neutrophil Count (ANC) in ascitic fluid **≥ 250 cells/mm³**. * **Most common organism:** *E. coli* (Gram-negative). * **Empiric Antibiotic of Choice:** 3rd generation cephalosporins (e.g., Cefotaxime). * **Prophylaxis:** Indicated if ascitic fluid protein is < 1.5 g/dL with associated renal or hepatic impairment [2]. Norfloxacin or Rifaximin are commonly used.

Q: A 73-year-old woman admitted with mild, spontaneously resolving upper GI hemorrhage, not requiring transfusion, had a history of significant aspirin ingestion over 4 months for rheumatoid arthritis pain. Endoscopy confirmed a duodenal ulcer, and biopsy was positive for H. pylori. What is the recommended next step in managing this duodenal ulcer?

Triple therapy. **Explanation:** The management of peptic ulcer disease (PUD) focuses on addressing the underlying etiology to promote healing and prevent recurrence [1]. In this patient, two major risk factors are present: **chronic NSAID (Aspirin) use** and **H. pylori infection** [1]. **1. Why Triple Therapy is Correct:** The presence of *H. pylori* is a definitive indication for eradication therapy, regardless of NSAID use [1]. Eradicating the organism significantly reduces the rate of ulcer recurrence and complications [1]. Standard **Triple Therapy** (Proton Pump Inhibitor + Clarithromycin + Amoxicillin/Metronidazole) is the first-line treatment. Even though aspirin contributed to the ulcer [1], failing to treat the infection leaves the patient at high risk for future bleeds. **2. Why Incorrect Options are Wrong:** * **H2 Blockers (A):** While they reduce acid, they are less potent than PPIs and do not address the *H. pylori* infection. They are no longer the standard of care for active ulcer healing when more effective options exist. * **Bipolar Electrocautery (B) & Photocoagulation (D):** These are **endoscopic hemostatic interventions**. They are indicated for *active* bleeding, visible vessels, or adherent clots (high-risk Forrest classification). Since the patient’s hemorrhage was mild and resolved spontaneously without the need for transfusion, invasive mechanical or thermal therapy is not indicated. **Clinical Pearls for NEET-PG:** * **Most common cause of PUD:** *H. pylori* (Duodenal > Gastric). * **Second most common cause:** NSAIDs (Gastric > Duodenal). * **Investigation of choice for PUD:** Upper GI Endoscopy (UGIE). * **Test of Cure:** Always perform a urea breath test or stool antigen test 4 weeks after completing therapy to confirm eradication [1]. * **NSAID management:** If possible, NSAIDs should be discontinued. If mandatory, co-prescription with a PPI is required for prophylaxis.

Q: Palmar erythema is seen in all of the following conditions except?

Anemia. **Explanation:** Palmar erythema is a clinical sign characterized by a symmetrical, mottled reddening of the palms, specifically over the thenar and hypothenar eminences. The underlying pathophysiology is primarily related to **hyperdynamic circulation** and **increased levels of circulating estrogen**, which lead to capillary dilatation. **Why Anemia is the Correct Answer:** Anemia is characterized by **pallor** of the palmar creases [1] and conjunctiva [1] due to reduced hemoglobin levels. While severe anemia can cause a hyperdynamic state, it does not typically manifest as palmar erythema. Therefore, it is the "except" in this list. **Analysis of Other Options:** * **Pregnancy (Option A):** High levels of endogenous estrogen during pregnancy cause increased vascularity and capillary dilatation, making palmar erythema a common physiological finding (seen in ~60-70% of pregnancies). * **Cirrhosis (Option B):** This is the most classic association. In chronic liver disease, the liver's ability to metabolize estrogen is impaired. Elevated estrogen levels and increased nitric oxide production lead to peripheral vasodilation and palmar erythema. * **Wilson Disease (Option D):** As a cause of chronic hepatitis and eventually cirrhosis, Wilson disease leads to palmar erythema via the same mechanism of hepatic insufficiency and altered hormone metabolism. **NEET-PG High-Yield Pearls:** * **Distribution:** Palmar erythema typically spares the central portion of the palm. * **Other Causes:** Thyrotoxicosis (due to increased cardiac output), Rheumatoid Arthritis (RA), and Chronic Febrile illnesses. * **Liver Signs:** Often co-exists with **Spider Angiomata** (also estrogen-dependent). * **Clinical Note:** It is not specific to liver disease but serves as a marker for altered sex hormone metabolism or systemic vasodilation.

Q: Portal hypertension is defined as hepatic venous pressure gradient more than:

5 mm Hg. **Explanation:** Portal hypertension is defined by an increase in the **Hepatic Venous Pressure Gradient (HVPG)**. The HVPG is the difference between the wedged hepatic venous pressure (representing sinusoidal pressure) and the free hepatic venous pressure (representing systemic venous pressure) [1]. 1. **Why 5 mm Hg is correct:** The normal HVPG ranges between **1 to 5 mm Hg** [1]. Portal hypertension is clinically defined as an HVPG **>5 mm Hg**. This represents the earliest hemodynamic threshold where portal pressures exceed the normal physiological range. 2. **Analysis of Incorrect Options:** * **1 mm Hg (Option A):** This is within the lower limit of the normal range and does not constitute hypertension. * **10 mm Hg (Option C):** This is the threshold for **Clinically Significant Portal Hypertension (CSPH)** [1]. At this level, complications like esophageal varices and ascites begin to develop. * **20 mm Hg (Option D):** This is a high-risk threshold associated with a significantly increased risk of active variceal bleeding and failure to control bleeding despite treatment. **High-Yield Clinical Pearls for NEET-PG:** * **HVPG >5 mm Hg:** Definition of Portal Hypertension [1]. * **HVPG ≥10 mm Hg:** Clinically Significant Portal Hypertension (CSPH); predicts the development of varices [1]. * **HVPG ≥12 mm Hg:** Threshold for **variceal rupture/bleeding**. * **Gold Standard:** HVPG measurement via the transjugular route is the gold standard for assessing portal pressure, as direct portal vein catheterization is invasive and risky [1].

Q: Acalculous cholecystitis can be seen in all of the following conditions except?

Malaria. **Explanation:** **Acalculous cholecystitis (AC)** is the inflammation of the gallbladder in the absence of gallstones. It typically occurs in critically ill patients due to gallbladder stasis and ischemia [1]. **Why Malaria is the Correct Answer:** While malaria (especially *P. falciparum*) can cause multi-organ dysfunction, it is **not** a recognized or typical cause of acalculous cholecystitis. Jaundice in malaria is primarily pre-hepatic (hemolysis) or due to malarial hepatitis (hepatocellular damage), rather than primary gallbladder inflammation. **Analysis of Other Options:** * **Dengue Hemorrhagic Fever:** AC is a well-documented complication of Dengue. It occurs due to increased vascular permeability leading to gallbladder wall edema and serous effusion, often seen during the critical phase. * **Leptospirosis:** This zoonosis can cause AC through direct bacterial invasion or systemic vasculitis. It is often part of the clinical spectrum in severe cases (Weil’s disease) alongside jaundice and renal failure. * **Enteric Fever (Typhoid):** *Salmonella typhi* can colonize the gallbladder. While it more commonly leads to a chronic carrier state in patients with stones, acute acalculous cholecystitis can occur during the second or third week of the illness due to lymphatic spread or direct invasion. **Clinical Pearls for NEET-PG:** * **Most common cause:** AC is most frequently seen in patients in the **ICU** (post-major surgery, severe trauma, burns, or prolonged TPN) [1]. * **Diagnosis:** **Ultrasonography** is the initial investigation of choice (look for wall thickening >4mm, pericholecystic fluid, and a positive sonographic Murphy’s sign). * **HIDA Scan:** This is the most sensitive imaging modality for AC if ultrasound is inconclusive. * **Other infectious causes:** HIV (CMV or Cryptosporidium), Cholera, and Polyarteritis Nodosa (PAN).

Q: Abdominal pain, fat malabsorption, and frothy stools suggest which of the following conditions?

Giardiasis. **Giardiasis** is caused by the protozoan *Giardia lamblia*, which primarily colonizes the duodenum and upper jejunum [1]. The parasite attaches to the intestinal mucosa via a ventral sucking disc, leading to the blunting of villi and functional malabsorption. The hallmark clinical presentation includes **foul-smelling, frothy, greasy stools (steatorrhea)** that float in water, accompanied by abdominal bloating, flatulence, and weight loss. The "frothy" nature is due to excess gas produced by bacterial fermentation of unabsorbed nutrients. **Why other options are incorrect:** * **Amoebiasis:** Caused by *Entamoeba histolytica*, it typically presents with bloody diarrhea (dysentery), tenesmus, and "anchovy sauce" liver abscesses [2]. It involves the colon rather than the small intestine, so fat malabsorption is not a feature. * **Bacillary dysentery:** Caused by *Shigella*, it presents with high-grade fever, severe abdominal cramps, and small-volume stools containing blood and mucus (inflammatory diarrhea), not malabsorptive stools. * **Pancreatic enzyme deficiency:** While this causes steatorrhea and fat malabsorption [3], it is usually a chronic condition (e.g., Chronic Pancreatitis) associated with deep-seated epigastric pain radiating to the back and history of alcohol use. In the context of standard NEET-PG questions, "frothy stools" is a classic buzzword for Giardiasis. **Clinical Pearls for NEET-PG:** * **Diagnosis:** Stool microscopy (Trophozoites with "Owl's eye" appearance or Cysts) or Entero-test (String test). * **Drug of Choice:** Tinidazole (single dose) or Metronidazole. * **Association:** Common in patients with **IgA deficiency**. * **Site:** It does not invade the bloodstream; it remains luminal/mucosal [1].

Q: Which investigation is considered the gold standard for diagnosing GERD?

24-hour esophageal pH monitoring. **Explanation:** **1. Why 24-hour esophageal pH monitoring is the Gold Standard:** Gastroesophageal Reflux Disease (GERD) is fundamentally defined by the abnormal reflux of gastric contents into the esophagus. The **24-hour ambulatory pH monitoring** is the gold standard because it provides a quantitative assessment of esophageal acid exposure. It measures the percentage of time the pH drops below 4, correlates symptoms with reflux episodes (Symptom Index), and calculates the **DeMeester Score**. It is particularly essential for patients with persistent symptoms despite PPI therapy or those with atypical (extra-esophageal) symptoms. **2. Analysis of Incorrect Options:** * **Upper GI Endoscopy (EGD):** While often the *first-line* investigation to rule out complications (like Barrett’s esophagus or malignancy), it has low sensitivity for GERD. Up to 60-70% of patients have **NERD (Non-Erosive Reflux Disease)**, where the endoscopy appears completely normal. * **Barium Swallow/Meal:** These are useful for identifying structural abnormalities like hiatal hernias, strictures, or achalasia, but they cannot reliably diagnose or quantify acid reflux. **3. High-Yield Clinical Pearls for NEET-PG:** * **Investigation of Choice (Initial):** Upper GI Endoscopy (to check for "red flags" like dysphagia or weight loss). * **Bravo pH Monitoring:** A newer, wireless capsule method that is better tolerated than the transnasal catheter. * **Impedance-pH Monitoring:** The preferred test for detecting **non-acid reflux** (alkaline reflux). * **Treatment of Choice:** Lifestyle modifications + Proton Pump Inhibitors (PPIs). * **Surgical Gold Standard:** Laparoscopic Nissen Fundoplication (360 wrap).

Q: A 65-year-old woman with a history of Hashimoto's thyroiditis presented with symptoms of malabsorption. Following evaluation, she was diagnosed with atrophic gastritis. Which of the following is NOT a feature of this patient's condition?

Excessive acid production in the stomach. This patient presents with **Autoimmune Atrophic Gastritis (Type A Gastritis)**, a condition frequently associated with other autoimmune disorders like Hashimoto's thyroiditis [2]. ### **Why Option B is Correct** In Autoimmune Atrophic Gastritis, the immune system produces antibodies against **parietal cells** and **intrinsic factor** [2]. Parietal cells are responsible for secreting hydrochloric acid (HCl). Their destruction leads to **achlorhydria** (absence of acid) or severe hypochlorhydria, not excessive acid production. Therefore, Option B is the incorrect feature. ### **Explanation of Other Options** * **Option A (Anti-parietal cell antibodies):** These are present in approximately 90% of patients and are the primary mediators of gland destruction in the fundus and body of the stomach. * **Option C (Endocrine cell hyperplasia):** Due to the lack of acid, the negative feedback loop on G-cells is lost, leading to **hypergastrinemia**. Persistent high gastrin levels stimulate the hyperplasia of Enterochromaffin-like (ECL) cells, which can eventually progress to carcinoid tumors. * **Option D (Vitamin B12 deficiency):** Parietal cell loss results in a deficiency of **Intrinsic Factor**. This leads to Vitamin B12 malabsorption, resulting in Megaloblastic anemia (Pernicious Anemia) and neurological symptoms (Subacute Combined Degeneration) [1]. ### **High-Yield Clinical Pearls for NEET-PG** * **Location:** Type **A** affects the **A**natomical Body/Fundus (spares the antrum). Type **B** is associated with **B**acteria (*H. pylori*) and affects the Antrum. * **Biopsy Findings:** Diffuse mucosal atrophy, loss of rugae, and intestinal metaplasia (increased risk of gastric adenocarcinoma). * **Associated Conditions:** Vitiligo, Type 1 Diabetes, and Addison’s disease (Autoimmune Polyendocrine Syndromes). * **Key Lab Marker:** Elevated serum gastrin levels (secondary to achlorhydria).

Question 1

Albumin treatment along with antibiotics in the setting of spontaneous bacterial peritonitis (SBP) is indicated to prevent the development of hepatorenal syndrome, EXCEPT in which of the following situations?

Accepted Answer

International Normalized Ratio (INR) > 2

Answer

Serum creatinine is > 1 mg/dl

Answer

Blood urea nitrogen (BUN) > 30 mg/dl

Answer

Total bilirubin is > 4 mg/dl

Question 2

A 73-year-old woman admitted with mild, spontaneously resolving upper GI hemorrhage, not requiring transfusion, had a history of significant aspirin ingestion over 4 months for rheumatoid arthritis pain. Endoscopy confirmed a duodenal ulcer, and biopsy was positive for H. pylori. What is the recommended next step in managing this duodenal ulcer?

Accepted Answer

Triple therapy

Answer

H2 blockers

Answer

Bipolar electrocautery of the ulcer

Answer

Photocoagulation

Question 3

Palmar erythema is seen in all of the following conditions except?

Accepted Answer

Anemia

Answer

Pregnancy

Answer

Cirrhosis

Answer

Wilson disease

Question 4

Portal hypertension is defined as hepatic venous pressure gradient more than:

Accepted Answer

5 mm Hg

Answer

1 mm Hg

Answer

10 mm Hg

Answer

20 mm Hg

Question 5

Venoocclusive disease is seen in all except?

Accepted Answer

Mushroom poisoning

Answer

Bone marrow transplant

Answer

Bush teas

Answer

Cytosine arabinoside

Question 6

Acalculous cholecystitis can be seen in all of the following conditions except?

Accepted Answer

Malaria

Answer

Dengue hemorrhagic fever

Answer

Leptospirosis

Answer

Enteric fever

Question 7

Abdominal pain, fat malabsorption, and frothy stools suggest which of the following conditions?

Accepted Answer

Giardiasis

Answer

Amoebiasis

Answer

Bacillary dysentery

Answer

Pancreatic enzyme deficiency

Question 8

Which investigation is considered the gold standard for diagnosing GERD?

Accepted Answer

24-hour esophageal pH monitoring

Answer

Upper GI endoscopy

Answer

Barium meal follow-through

Answer

Barium swallow

Question 9

Which of the following statements regarding gluten-sensitive enteropathy is not true?

Accepted Answer

Consumption of barley, rice, oats, and wheat should be avoided.

Answer

It is also known as celiac sprue.

Answer

Anti-gliadin antibodies are present.

Answer

Cryptitis does not occur in gluten-sensitive enteropathy.

Question 10

A 65-year-old woman with a history of Hashimoto's thyroiditis presented with symptoms of malabsorption. Following evaluation, she was diagnosed with atrophic gastritis. Which of the following is NOT a feature of this patient's condition?

Accepted Answer

Excessive acid production in the stomach

Answer

Anti-parietal cell antibodies

Answer

Endocrine cell hyperplasia

Answer

Vitamin B12 deficiency

Gastroenterology — MCQs

Gastroenterology — MCQs

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