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WHO Classification of Tumours
Kaposi sarcoma


A malignant neoplasm characterized by a vascular proliferation which usually contains blunt endothelial cells. Erythrocyte extravasation and hemosiderin deposition are frequently present. It preferentially develops in people with compromised immune systems including those with the acquired immune deficiency syndrome (AIDS).

In the appendix, Kaposi sarcoma is exceedingly rare

Click to access Pubmed
Deziel DJ, Saclarides TJ, Marshall JS, Yaremko LM (1991)
Appendiceal Kaposi's sarcoma: a cause of right lower quadrant pain in the acquired immune deficiency syndrome.
Am J Gastroenterol 86: 901-3