Kaposi Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm characterized by a vascular proliferation which 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).

**Synonyms:** - KS - Kaposi sarcoma - Kaposi's Sarcoma - Kaposi's sarcoma - Kaposi's sarcoma, unspecified - Multiple Hemorrhagic Sarcoma - Multiple hemorrhagic sarcoma