We report a case of metastatic renal cell carcinoma arising in a cadav
er transplant kidney 6 years after transplantation. Due to molecular a
nalysis of the tumor tissue we could prove that the carcinoma originat
ed from the male donor. After tumor resection and interruption of immu
notherapy, the concomitant bone and lymph node metastases resolved wit
h alpha-interferon and interleukin-2-based immunotherapy.