Interleukin-2 has known efficacy in the treatment of metastatic renal cell carcinoma but it also has adverse effects mediated by an inflammatory mechanism and capillary leak syndrome. The authors report the case of a patient with a metastatic renal cell carcinoma who had an asymptomatic intra-epidural metastasis in the thoracic spine, which became symptomatic during IL-2 administration without any recurrence after specific treatment by surgery and radiotherapy.