Kaposi's sarcoma and lymphoma: report of a case and review of the literature.

A 23-year-old woman was diagnosed with cutaneous and gingival Kaposi's sarcoma and low-grade lymphoma. Few cases of this rare association have been reported, Pathogenic hypotheses have been put forward that involve genetic susceptibility, oncogenic viruses, immunodepression, and local interactions between tumor clones, but none has been confirmed to date, In our patient, development of Kaposi's sarcoma may have been secondary to immune defense impairment due to the lymphoma.