Lymphoproliferative disorder involving the cervix in a patient being treated with FK-506.

FK-506 is an immunosuppressive agent used mainly to prevent allograft rejection in organ transplant patients. Recently, it has been applied as a treatment for patients with autoimmune disorders. An entity called posttransplant lymphoproliferative disorder (PTLD) is a well-recognized result of immunosuppression in transplant patients receiving long-term immunosuppression. This disorder is a complication of treatment with FK-506 in 0.7 to 1.6% of transplant patients and is usually of B-cell origin. A majority of patients have serologic evidence of EBV infection. We report a case of a patient receiving long-term FK-506 therapy for multiple sclerosis who developed lymphoproliferative disorder involving the cervix. We will discuss the possible role of FK-506 initiation of this tumor.