Abstract
Intraosseous schwannomas are rare and represent 0.2% of all bone tumors. Their occurrence in tibia is extremely rare and only five cases have been reported till date. We report an additional case of intraosseous schwannoma in right tibia of a 46-year-old female whose plain radiograph of right knee joint revealed an osteolytic expansile lesion with trabeculations in the proximal tibia. Magnetic resonance imaging study showed a well defined, lobulated mass in the anteromedial aspect of upper tibia. Histopathological examination of the excised specimen revealed schwannoma which was confirmed by positivity for S-100 on immunohistochemistry.
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