Variant of Giant cell tumor is?

Chondroblastoma [Ref This is the best we could find, after long hours of search. "A chondroblastoma is a rare, usually benign, tumor of bone that accounts .for approximately I% of all bone tumors. In 1931, Cadman classified it as a chondromatous variant of giant cell tumors, when he described these lesions in the proximal humerus. A decade later, Jaffe and Lichtenstein renamed the Codman tumor a benign chondroblastoma to emphasize the chondroblastic genesis of the lesion and to distinguish it .from the classic giant cell tumor of bone."- emedicine.inedscape.com