A 23 year old male has presented with repeated episodes of hematemesis. There is no history of jaudice or liver decompensation. On examination ther significant findings include splenomegaly (8 ems below costal margin), and presence of esophageal varices. There is no ascites or peptic ulceration. The liver function tests are normal. The most likely diagnosis is

**Core Concept**
The patient's presentation of hematemesis, splenomegaly, and esophageal varices in the absence of liver dysfunction or ascites suggests portal hypertension, a condition characterized by increased pressure in the portal venous system.

**Why the Correct Answer is Right**
The presence of splenomegaly and esophageal varices is indicative of portal hypertension. This is often due to increased resistance to blood flow in the hepatic sinusoids, which can be caused by liver cirrhosis. However, the absence of liver dysfunction or ascites in this case suggests that the underlying cause may be extrahepatic. The most likely diagnosis is non-cirrhotic portal hypertension (NCPH), which can be caused by portal vein thrombosis, schistosomiasis, or other conditions that increase resistance in the portal venous system.

* **Option B:** Portal vein thrombosis is a possible cause of non-cirrhotic portal hypertension, but it is not the most common cause.
* **Option C:** Schistosomiasis is a parasitic infection that can cause portal hypertension, but it is rare in this region and not the most likely diagnosis.
* **Option D:** Liver cirrhosis is a common cause of portal hypertension, but the absence of liver dysfunction or ascites makes this diagnosis less likely.

**Clinical Pearl / High-Yield Fact**
Non-cirrhotic portal hypertension can be caused by a variety of conditions, including portal vein thrombosis, schistosomiasis, and splenic vein thrombosis. A high index of suspicion is required to diagnose this condition, as it can present with similar symptoms to cirrhotic portal hypertension.

**Correct Answer:** .

✓ Correct Answer: B. Non cirrhotic poal fibrosis