The tibia is the most commonly involved bone, accounting for 85% of cases. It is usually painless, although there may be localized pain or fracture, and presents as a localized firm swelling of the tibia in children less than two decades old (median age for males 10, females 13). Several authors have related this non-neoplastic lesion to adamantinoma - a tumor involving subcutaneous long bones - stating the common cause to be fibrovascular defect. However, the latter is distinguished from an<unk>  by the presence of soft tissue extension, intramedullary extension, periosteal reaction and presence of hyperchromic epithelial cells under the microscope.<unk>  may also be mistaken for fibrous<unk>  of bone, although<unk>  is more likely to show an immunohistochemical reaction to osteonectin, neurofibromin 1, and S-100 protein.
Osteofibrous dysplasia
Fibrous dysplasia of bone
Osteochondrosis
Osteochondroma
Osteoid osteoma
Osteopetrosis
Myositis ossificans
Bone cyst