You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is True about Epithelioid hemangioendothelioma and explain in detail?
EPITHELIOID HEMANGIOENDOTHELIOMA (EHE) is rare vascular tumor of adults, is usually multifocal and can also be associated with prolonged survival, even in the presence of metastases, which are commonly seen in the lung. There is usually no underlying cirrhosis. Histologically, these tumors are usually of borderline malignancy and express factor VIII an gen, confirming their endothelial origin.