Jaw angiosarcoma. First case, with massive intraosseous localization, described in Italian literature.

Angiosarcoma (AS) is a rare non-epithelial malignant neoplasm arising from neoplastic vascular degeneration of endothelial cells. It usually occurs in soft tissue and skin. The incidence, according to American authors, is 1% of all soft tissue sarcomas. About 50% of AS is localized in head and neck region (scalp and face skin) and represents less than 1% of all malignancies of this district; the primitive intra- oral localization is rare, even rarer intraosseous development of AS in jaw bones. The Authors report a case of a mandibular intraosseus angiosarcoma with different peculiarities: the rarity of the location and mode of occurrence; in addition they have focused on clinical-histopathological and immunohistochemical charateristics.