Chondroblastoma Wheeless

Description: Discussion: - age at presentation: - most common primary epiphyseal tumor in children is chondroblastoma; - most commonly arises between ages 10 to 30; - not infrequently, the tumor will also arise in adults; - the adults counterpart of chondroblastoma is giant cell tumor; - in the report by AJ. Ramappa et al, 62 % of the 47 patients were 20 of age or younger (in contrast, 38% of patients will be well beyond skeletal maturity); - location: - lesions are distributed widely in the skeleton, but most were in the epiphyses or apophyses; - most lesions occur in the proximal part of the tibia (17%) and the proximal part of the humerus (15%); (J Bone Joint Surg [Am] 82-A: 1140-5, 2000) - may occur in the apophysis of the greater trochanter; - of note, chondroblastoma is the most common tumor affecting the patella, followed by giant cell tumor; - metastatic lesions are uncommon but due occur; - males more affected than females