CHONDROBLASTOMA IN THE DISTAL FEMUR: A CASE REPORT WITH LITERATURE REVIEW

Chondroblastoma is an aggressive tumor of bone with the capacity for recurrence and metastasis with a relatively high incidence in older children and adolescents during the period of active epiphyseal growth. It is generally regarded as a benign neoplasm, but sometimes it grows aggressively or recurs.14-year-old young boy operated operated twice for chondroblastoma. Currently he presented with right knee joint pain, which started two months ago. Radiography and magnetic resonance imaging studies of the right knee showed concluded to recurrence of chondroblastoma of the distal femur. The histologic study of the biopsy curettage showed a chondroblastic with large polygonal cells. The final diagnostic was chondroblastoma.Chondroblastoma is a rare primary bone tumor of young people that typically arises in the ends of the long bonesRadiologic investigations show a small, circumscribed, lytic lesion. The tumor is characterized histologically by the proliferation of chondroblasts along with areas of mature cartilage, giant cells, and occasionally, secondary aneurysmal bone cyst formation. Recently, immunohistochemical stains such as DOG1 and SOX9 have been described in Chondroblastoma.