Abstract
In the search for a genetic factor involved in the etiology of Kaposi's sarcoma, several studies have recently focused on a significantly increased HLA determinant, DR5, as well as a decreased DR3, among patients with both the classical and the AIDS-related form of Kaposi's sarcoma. To test the consistency of this phenomenon, we analysed the frequencies of HLA immunogenetic markers in 23 histologically confirmed Kaposi's sarcoma patients from Central Africa, where this tumor is endemic, and a local sex- and tribe-matched control group. No definite association was observed for any of the HLA antigens, including DR5 and DR3. We were not able to support the hypothesis that the same HLA-associated immune susceptibility factors are involved in all types of Kaposi's sarcoma.
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