Chondroblastoma was first described in detail by codman in 1931 and so is occasionally referred to as codman’s tumo
r. Chondroblastoma was first described as calcified giant cell tumor by Ewing.11 Chondroblastoma constitutes a very rare bone tumor entity.2,6 In most cases it manifests between 10 to 20 years. Chondroblastoma are typically centered in an epiphysis. Although they occur most often in the end of a major tubular bone, they can appear in any secondary center of ossification, such as the greater trochanter. Males predominate in incidence. In the literature, there are only three types of tumors that involve the physis. They are chondroblastoma, Giant cell tumor of the bone, and clear cell chondrosarcoma. Other possible differential diagnosis would be epiphyseal osteomyelitis. Roentgenograms show a characteristic well-delineated area of rarefaction of cancellous bone extending over and beyond the epiphyseal line quite early. The position is often eccentric in the …show more content…
Predominant secondary aneurysmal bone cyst like changes has been noted in up to 15% of chondroblastoma cases.9 Some authors have suggested that recurrences are more common when aneurysmal bone cyst changes are present. Treatment for chondroblastoma consists of simple curettage, bone grafting, and possible cementation using similar techniques as for giant cell tumor surgery.8,9 After intralesional resection, reconstruction can be accomplished with autograft or allograft or both. When treated with curettage these tumors seem to have a higher rate of recurrence.10 Unni recommendations that aggressive lesions (lesions with cortical erosion or cortical breakthrough) should be treated with wide cortical saucerisation and curettage. Cryotherapy or phenol can be used as adjuvants.2 Vascularised or cancellous autogenous grafts would give maximum bone incorporation but donor site morbidity limits their
r. Chondroblastoma was first described as calcified giant cell tumor by Ewing.11 Chondroblastoma constitutes a very rare bone tumor entity.2,6 In most cases it manifests between 10 to 20 years. Chondroblastoma are typically centered in an epiphysis. Although they occur most often in the end of a major tubular bone, they can appear in any secondary center of ossification, such as the greater trochanter. Males predominate in incidence. In the literature, there are only three types of tumors that involve the physis. They are chondroblastoma, Giant cell tumor of the bone, and clear cell chondrosarcoma. Other possible differential diagnosis would be epiphyseal osteomyelitis. Roentgenograms show a characteristic well-delineated area of rarefaction of cancellous bone extending over and beyond the epiphyseal line quite early. The position is often eccentric in the …show more content…
Predominant secondary aneurysmal bone cyst like changes has been noted in up to 15% of chondroblastoma cases.9 Some authors have suggested that recurrences are more common when aneurysmal bone cyst changes are present. Treatment for chondroblastoma consists of simple curettage, bone grafting, and possible cementation using similar techniques as for giant cell tumor surgery.8,9 After intralesional resection, reconstruction can be accomplished with autograft or allograft or both. When treated with curettage these tumors seem to have a higher rate of recurrence.10 Unni recommendations that aggressive lesions (lesions with cortical erosion or cortical breakthrough) should be treated with wide cortical saucerisation and curettage. Cryotherapy or phenol can be used as adjuvants.2 Vascularised or cancellous autogenous grafts would give maximum bone incorporation but donor site morbidity limits their