Gastroenterology Practice Questions

Q: A patient presents with a history of alcoholic cirrhosis. Imaging reveals a hypervascular lesion during the arterial phase of CT and portal vein thrombosis. What is the most likely diagnosis given these findings?

Hepatocellular carcinoma. **Explanation:** The clinical presentation described is a classic textbook case of **Hepatocellular Carcinoma (HCC)**. **1. Why Hepatocellular Carcinoma is correct:** HCC typically arises in the setting of chronic liver disease, most commonly **alcoholic cirrhosis** or chronic Hepatitis B/C. The hallmark radiological feature of HCC on dynamic contrast-enhanced CT or MRI is **"Arterial Enhancement with Venous Washout."** Because HCC derives its blood supply primarily from the hepatic artery (unlike normal liver parenchyma which relies on the portal vein), it appears **hypervascular during the arterial phase** [1]. Furthermore, HCC has a high propensity for **vascular invasion**, specifically involving the **portal vein**, leading to portal vein thrombosis (PVT) [1]. **2. Why the other options are incorrect:** * **Cholangiocarcinoma:** This typically presents as a non-cirrhotic mass with **delayed enhancement** (due to fibrous stroma) rather than arterial hypervascularity. It rarely causes portal vein thrombosis. * **Metastatic colorectal carcinoma:** These are usually **hypovascular** lesions. While they are the most common liver tumors overall, they do not typically show arterial phase "washout" or occur specifically due to cirrhosis. * **Neuroendocrine tumors (NETs):** While NET metastases can be hypervascular, they are usually multiple (not a single lesion) and are not associated with cirrhosis or a high frequency of portal vein thrombosis. **High-Yield Clinical Pearls for NEET-PG:** * **Tumor Marker:** Alpha-fetoprotein (AFP) is the most common marker; levels >400 ng/mL are highly suggestive [1]. * **Screening:** USG + AFP every 6 months for cirrhotic patients. * **Milan Criteria:** Used to determine eligibility for liver transplantation (Single lesion <5cm or up to 3 lesions <3cm). * **Treatment of choice for PVT:** Sorafenib or Lenvatinib (Systemic therapy) is indicated when vascular invasion is present [2].

Q: Which one of the following causes acute pancreatitis in a non-alcohol abuser?

Gall stones. **Explanation:** **Gallstones (Option D)** are the most common cause of acute pancreatitis worldwide, accounting for approximately 40–70% of cases. In non-alcoholics, the primary mechanism is the migration of a gallstone into the common bile duct, leading to transient or persistent obstruction of the Ampulla of Vater [1]. This causes reflux of bile into the pancreatic duct and increased intraductal pressure, triggering the premature intrapancreatic activation of digestive enzymes (trypsinogen to trypsin), leading to autodigestion of the gland. **Analysis of Incorrect Options:** * **Thiazides (Option A):** While certain drugs can cause pancreatitis, they are rare causes. Thiazides are categorized as Class II/III drugs associated with pancreatitis, but they are significantly less common than mechanical obstruction. * **Hypercalcemia (Option B):** Elevated calcium levels can lead to the activation of trypsinogen within the pancreas, but this is a metabolic cause seen much less frequently than gallstones. * **Hypercholesterolemia (Option C):** This is a distractor. It is **Hypertriglyceridemia** (typically levels >1000 mg/dL), not hypercholesterolemia, that is a recognized cause of acute pancreatitis. **NEET-PG High-Yield Pearls:** * **Mnemonic (GET SMASHED):** **G**allstones (Most common), **E**thanol (2nd most common), **T**rauma, **S**teroids, **M**umps, **A**utoimmune, **S**corpion sting, **H**ypertriglyceridemia/Hypercalcemia, **E**RCP, **D**rugs (Azathioprine, Sulfonamides, Valproate). * **Diagnosis:** Requires 2 out of 3: (1) Acute epigastric pain radiating to the back, (2) Serum amylase/lipase >3x upper limit, (3) Characteristic findings on CECT [2]. * **Lipase** is more specific and remains elevated longer than amylase.

Q: Liver biopsy is indicated in patients with hemochromatosis only if which of the following is present?

Serum ferritin is > 1000 g/L. In the modern management of Hereditary Hemochromatosis (HH), liver biopsy is no longer required for diagnosis, which is now primarily based on genetic testing (HFE gene mutations) and iron studies [1]. However, a biopsy remains the gold standard for **prognostication**, specifically to assess for cirrhosis and the risk of hepatocellular carcinoma (HCC) [1]. **Why Option B is correct:** A serum ferritin level **>1000 µg/L** is the most significant predictor of advanced fibrosis and cirrhosis in patients with HH [1]. If ferritin is <1000 µg/L and liver enzymes are normal, the risk of cirrhosis is negligible, and a biopsy can be safely avoided. Therefore, a biopsy is indicated when ferritin exceeds this threshold to stage the disease [1]. **Analysis of Incorrect Options:** * **Option A:** While elevated transaminases suggest liver injury, they are non-specific. Ferritin levels are a more reliable trigger for biopsy in the context of iron overload. * **Option C:** If clinical or radiological evidence of cirrhosis is already present (e.g., esophageal varices, shrunken liver on USG), a biopsy may be redundant or risky; the biopsy is performed to *detect* occult cirrhosis when ferritin is high [2]. * **Option D:** Transferrin saturation (TSAT) is the **earliest screening marker** (usually >45%). While it indicates iron overload, it does not correlate with the degree of tissue damage or fibrosis. **High-Yield NEET-PG Pearls:** * **Best Initial Test:** Transferrin Saturation (TSAT). * **Most Accurate Diagnostic Test:** Genetic testing for C282Y mutation of the HFE gene [1]. * **Classic Triad (Bronze Diabetes):** Cirrhosis, Diabetes Mellitus, and Skin Hyperpigmentation. * **Treatment of Choice:** Therapeutic phlebotomy (Target ferritin: 50–100 µg/L) [1]. * **MRI (T2*):** A non-invasive alternative to biopsy for quantifying hepatic iron concentration [1].

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: 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].

Question 1

A 60-year-old alcoholic man presents with a 6-month history of recurrent epigastric pain, progressive weight loss, and foul-smelling diarrhea. The abdominal pain is now almost constant and intractable. An X-ray film of the abdomen reveals multiple areas of calcification in the mid-abdomen. Which of the following is the most likely diagnosis?

Accepted Answer

Chronic pancreatitis

Answer

Carcinoid syndrome

Answer

Crohn disease

Answer

Insulinoma

Question 2

A 48-year-old man presents with a complaint of non-bloody diarrhea and right lower quadrant pain with a palpable mass and tenderness. Radiographic examination reveals evidence of ulceration, stricture, and fistula development of the colon and small bowel. Which of the following drugs would be MOST useful for treating this patient?

Accepted Answer

Prednisone

Answer

Diphenoxylate and atropine

Answer

Hydrocortisone suppositories

Answer

Hyoscyamine

Question 3

A 43-year-old man develops chronic hepatitis, which was attributed to a complication resulting from multiple blood transfusions for sickle cell anemia. He complains of chronic sweating, palpitation, and hunger attacks. What is the most likely cause of these symptoms?

Accepted Answer

Hepatogenic hypoglycemia

Answer

Hemolytic anemia

Answer

Jaundice

Answer

Spontaneous hyperglycemia

Question 4

A patient presents with a history of alcoholic cirrhosis. Imaging reveals a hypervascular lesion during the arterial phase of CT and portal vein thrombosis. What is the most likely diagnosis given these findings?

Accepted Answer

Hepatocellular carcinoma

Answer

Cholangiocarcinoma

Answer

Metastatic colorectal carcinoma

Answer

Neuroendocrine tumors

Question 5

Which one of the following causes acute pancreatitis in a non-alcohol abuser?

Accepted Answer

Gall stones

Answer

Thiazides

Answer

Hypercalcemia

Answer

Hypercholesterolemia

Question 6

A patient presents with tachycardia, BP of less than 100 mm systolic, and postural hypotension. What is the most likely diagnosis?

Accepted Answer

Bleeding peptic ulcer

Answer

Vasovagal attack

Answer

Diabetic neuropathy

Answer

Shy Drager syndrome

Question 7

Liver biopsy is indicated in patients with hemochromatosis only if which of the following is present?

Accepted Answer

Serum ferritin is > 1000 g/L

Answer

Elevation of transaminases is present

Answer

Evidence of cirrhosis is present

Answer

Percentage saturation of iron is high

Question 8

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 9

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 10

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

Gastroenterology — MCQs

Gastroenterology — MCQs

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