[Clinical analysis of 12 cases of long bone ossifying fibromas]

Twelve cases of ossifying fibroma of long bones, the lesions in 11 cases were resected with their sclerotic margin. Inactivation of the tumor cells within bone cavity was applied 50% Zinc Chloride, and autogenous bone grafts were applied with or without a few man-made bones. One case was treated by en bloc resection of the lesion. Follow-up for 3-14 years revealed that 2 cases recurred, and secondary operation was performed. After that follow-up for 5-14 years revealed no-recurrence. Recurrence rate of these cases was low and the effect of treatment was satisfactory. This kind of lesion showed the features of its aggressive growth and proneness to recur after operation. The authors consider that resection of the lesion including its sclerotic margin was effective to prevent recurrence.