Solitary bone plasmacytoma is a rare malignant monoclonal gammopathy with relatively indolent course. We present a case of a 50-years-old man. The disease first presented by neurological impairment with loss of lower limb mobility, sweats and fever. In the first place the surgical treatment was done with subsequent radiotherapy (40 Gy) of the spine. In the following 4 months signs of the disease disappeared (negative immunofixation). Only long term regular follow-up was indicated.

        Key words: solitary bone plasmacytoma, radiotherapy, monoclonal gammopathies.