Variant of Giant cell tumor is
GCT is adult counterpa of chondroblastoma. Chondroblastoma is an epiphyseal tumor which occurs in 2nd decade while GCT is an epiphyseal tumor which occurs in adults Refer https ://emedicine. Medscape.com/aicle/125449-overview
Ossifying fibroma
Non Ossifying fivroma
Osteosarcoma
Chondtoblastoma
Skeletal infections