Abstract

Osteoblastoma-like osteosarcoma is a rare, low-grade variant of osteosarcoma that may resemble osteoblastoma clinically, radiographically and histologically. We report a case of osteoblastoma-like osteosarcoma in the right proximal tibia in a 17-year-old woman. Plain radiography revealed an irregular osteolytic lesion in the metaepiphysis of the right proximal tibia and transverse fracture line of the metaphysic through an osteolytic lesion. MRI showed well-defined mass confined to the medullary space with cortical disruption and pathologic fracture. The MR signals were low on T1-weighted image and intermediate on T2-weighted image.

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