title: Florid reactive periostitis.
abstract: A case of florid reactive periostitis of the thumb is reported. This rare, benign, bone-producing lesion is easily confused with osteosarcoma. It is also known as parosteal or nodular fascitis. Careful histologic and radiographic evaluations are needed to establish the diagnosis and avoid unnecessary amputation. Marginal excision seems to be adequate treatment.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D010522:Periostitis / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D013933:Thumb