Primary plasmacytoma at the site of exit wounds after electrical injury.

We report a case of primary plasmacytoma occurring 12 years after electrical injury. Roentgenograms showed multiple well-circumscribed lytic lesions involving both the right and left tibial diaphyseal regions. Bone biopsy from the left tibial region showed sheets of monoclonal myeloma cells. No evidence of multiple myeloma was found. The patient was treated with local radiation to both tibias and had no evidence of recurrence 6 years later. In conclusion, we report the first case of primary plasmacytoma of both tibias that occurred after electrical injury 12 years before.