**Question:** A 38-year old homeless male develops sudden onset hematemesis following a bout of severe vomiting and retching. He had no complaints prior to the onset of his symptoms. On examination, he is pale and looks anxious. The vital signs are normal. Laboratory investigations show normal liver function tests, a low Hb and high MCV, chest X-ray is normal. The above problem on endoscopy would appear as -

A. Gastric ulcer
B. Esophageal varices
C. Duodenal ulcer
D. Pancreatic necrosis

**Correct Answer:** B. Esophageal varices

**Core Concept:** Hematuria (blood in urine) and hematemesis (blood in vomit) are clinical signs indicating bleeding from the upper gastrointestinal tract (UGI). Esophageal varices are dilated, tortuous veins in the esophagus caused by portal hypertension. Portal hypertension is a condition where blood pressure in the portal vein is elevated due to increased blood flow to the liver.

**Why the Correct Answer is Right:** The patient presents with sudden onset hematemesis and a history of severe vomiting and retching, suggesting a bleeding source in the upper GI tract. The normal vital signs and chest X-ray rule out cardiac or respiratory causes, respectively. The low Hb and high MCV indicate anemia, which is consistent with blood loss. Esophageal varices are the most common cause of UGI bleeding in patients with portal hypertension.

**Why Each Wrong Option is Incorrect:**

A. Gastric ulcer: Though ulcers may cause bleeding, they are typically not seen on endoscopy as they are mostly located in the stomach and are self-limiting.

B. Duodenal ulcer: Similar to gastric ulcer, duodenal ulcers are not typically seen on endoscopy as they are located in the duodenum, which is not directly visible during endoscopy.

C. Pancreatic necrosis: This is a complication of acute pancreatitis and is not associated with bleeding or endoscopy findings.

D. Pancreatic necrosis: Similar to option C, pancreatic necrosis is a complication of acute pancreatitis and is not associated with bleeding or endoscopy findings.

**Clinical Pearl:** Esophageal varices are the most common cause of UGI bleeding in patients with portal hypertension, which is often a result of liver cirrhosis. Esophageal varices are visible on endoscopy as they are located in the esophagus. Treatment options include endoscopic therapy (sclerotherapy or band ligation) and pharmacotherapy (propranolol). Early recognition and prompt intervention are crucial to prevent severe hemorrhage and complications like variceal rupture, which can lead to life-threatening bleeding.