Localized solitary plasmacytoma of the bone is a rare disease, and is characterized by only one isolated bone lesion with no evidence of disease dissemination. Two cases of solitary plasmacytoma that originated in the 12th thorachicae and the right 5th rib are reported in this paper. Radiotherapy was mainly performed on these cases. Both cases are alive without recurrence or dissemination, 12 and 2 years after the treatment respectively.
