May Be Caused by

 Common

Cortical desmoid

Osteochondroma

Parosteal myositis ossificans

Parosteal osteosarcoma

Periosteal osteosarcoma

Periosteal desmoid

Subperiosteal osteoid osteoma

Turret exostosis

 Uncommon

Bizarre parosteal pseudotumor

Chondrosarcoma arising from osteochondroma

Fibrosarcoma

Florid reactive periostitis

Giant cell tumor of tendon sheath

Glomus tumor

Gouty tophus

High-grade surface osteosarcoma

Kaposi sarcoma

Malignant fibrous histiocytoma

Ossifying fasciitis

Osteoma

Parosteal chondrosarcoma

Parosteal fasciitis

Parosteal hemangioma

Parosteal lipoma

Periosteal chondroma

Periosteal chondrosarcoma

Periosteal fibroma

Periosteal ganglion

Subperiosteal aneurysmal bone cyst

Subperiosteal ganglion

Subperiosteal osteoblastoma

Synovial sarcoma