title: Benign Chondroblastoma.
abstract: Eight cases of benign chondroblastoma seen between 1957 and 1980 were reviewed. The majority presented between the age of 10 and 25. There was no male preponderance. All except one lesion occurred in the epiphysis but biansagression across epiphyseal plate into the metaphysis was not uncommon. In only one case the lesion was entirely in the metaphysis of the middle phalanx of a finger. Radiologically, the lesion appeared cystic with mottled calcification and a peripheral sclerotic margin. Microscopically, all lesions were benign with three characteristic features: round a polygonal chondroblast, areas of cell necrosis with intra and extra-cellular calcification and giant cells in response to the dead cells. Thorough curettage and bone grafting resulted in complete resolution in all cases without recurrence. For the lesions of the femoral head, an approach through the fovea of the head after division of the ligamentum teres and dislocation of the hip anteriorly was preferred. Adequate curettage could be dome without the risk of avascular necrosis or femoral neck fracture otherwise encountered with the transcervical approach.
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D002648:Child; D002813:Chondrosarcoma / Q000000981:diagnostic imaging / Q000601:surgery*; D003475:Curettage / Q000379:methods; D005260:Female; D005266:Femoral Neoplasms / Q000601:surgery; D005385:Fingers / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D011859:Radiography