This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
True about Epithelioid hemangioendothelioma 
Select and explain. 
A. Rare vascular tumor of infants, B. Usually solitary, C. Underlying cirrhosis common, D. Expresses factor VIII an gen
D: Expresses factor VIII an gen
Answer: D: Expresses factor VIII an gen 
Explanation: 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.