Kaposi Sarcoma

A malignant neoplasm characterized by a vascular proliferation that usually contains blunt endothelial cells. Erythrocyte extravasation and hemosiderin deposition are frequently present. The most frequent site of involvement is the skin; however, it may also occur internally. It generally develops in people with compromised immune systems including those with acquired immune deficiency syndrome (AIDS).

Source: NCI Thesaurus (C9087).