Kaposi's Sarcoma is a cancerous lesion that can occur on the soles of the feet. The lesion is irregular in shape and has a purplish, reddish or bluish black appearance. Kaposi's Sarcoma lesions tend to spread and form large plaques or become nodular. The nodular lesions have a firm rubbery appearance. The disease is usually associated with AIDS infection. It can occur without the concurrent AIDS infection, but this is very rare.
Dr. Joseph Hall
When you have problems with your feet, you need to turn to foot and ankle doctors who listen.