Solitary plasmacytoma of rib: a rare presentation

Plasmacytoma of Bone (SPB) is a rare neoplasm that accounts for about 5% of all plasma cell neoplasms. Clinically, it presents as a localized lytic bone lesion. Its diagnosis is based on identification of localized monoclonal plasma cells with immunohistochemistry.SPB commonly involves spine and pelvis while the involvement of rib is very rare with only a few sporadic cases reported before. We report this case of solitary plasmacytoma of left 5th and 6th ribs in a 43?year?old male. It was clinically and radiologically diagnosed as sarcoma. Histopathological examination and immunohistochemistry enabled the diagnosis of plasmacytoma. Further biochemical investigations, bone marrow examination and radiological assessment were performed to fulfill the diagnostic criteria of solitary plasmacytoma of bone.