The presence of antineuronal anti-Tr antibodies is associated to paraneoplastic cerebellar degeneration due to Hodgkin's disease. The anti-Tr can become negative after successful and early treatment of the tumor, and there could even be remission of the cerebellar symptoms in some patients. There are few cases in which no tumor is found when there are anti-Tr. We report the case of a 66 year old man with a severe cerebellar syndrome and anti-Tr in serum detected by immunohistochemistry. After a 4 year follow-up, no underlying tumor has been found. In addition, anti-Tr spontaneously disappeared. The cerebellar degeneration persists and is incapacitating. This case suggests that in a few instances the origin of anti-Tr is not a tumor but another unknown cause. Alternatively the anti-Tr mediated immune response could have eradicated the underlying lymphoma.