[What position to take for Kaposi's sarcoma in organ transplantation?].

Kaposi's Sarcoma (KS) is a tumor of multicentric origin, accounting for 4% of the observed neoplasia among organ transplant recipients. Its exact pathogenesis is still unknown. The diagnosis must be suspected in view of skin and/or subcutaneous tumor lesions with potential visceral involvement, which are easily confirmed by histological examination. Initial staging of the disease in 4 subgroups allows to guide therapy and prognosis. Therapeutic options depend on the transplanted organ and on results of early staging at time of diagnosis and treatment may associate: decrease and/or cessation of immunosuppression, laser therapy, radiotherapy and/or chemotherapy.