Close-up of the face of a person with AIDS (Acquired Immune Deficiency Syndrome), showing a purple skin lesion characteristic of Kaposi's sarcoma, a type of vascular cancer, located over the left eye. Kaposi's sarcoma was hitherto usually only seen in elderly persons of Jewish or Mediterranean stock, but is one of the two most common opportunistic diseases associated with AIDS. Its spread, however, is an uncommon cause of death: AIDS patients are more likely to succumb to Pneumocystis carinii pneumonia, the other most rampant opportunistic infection in AIDS.