Review of four cases of childhood hepatic angiosarcoma—elevated environmental arsenic exposure in one case

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Abstract
Four cases of childhood hepatic angiosarcoma (HAS), representing the malignant form of infantile hemangioendothelioma, are described. The morphologic appearance of childhood HAS differs from the adult form in the following features: the associated presence of benign infantile hemangioendothelioma; the presence of dysontogenetic features; and an altered appearance of the angiosarcoma itself. It is postulated for these cases that the benign infantile hemangioendothelioma progressed to the malignant angiosarcoma. One of the four cases had exposure to elevated levels of arsenic in the environment that may have contributed to this progression. This latter case adds to published reports associating arsenic exposure with increased risk for hepatic angiosarcoma.

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