Resection of the largest reported hepatic small vessel neoplasm

Hepatic small vessel neoplasm (HSVN) is a recently described vascular neoplasm of the adult liver. The neoplastic cells are positive for markers of vascular lineage (CD31, CD34, FLI-1). The distinctive morphology and infiltrative borders separate HSVN from benign vascular tumors such as cavernous hemangioma, while lack of atypical morphologic features, low to absent mitotic activity and low proliferation index distinguish it from malignant vascular tumors such as epithelioid hemangioendothelioma and angiosarcoma.

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