An atypical case of nonossifying fibroma

Abstract

An atypical case of nonossifying fibroma involving the distal tibia of a 10-year-old girl is presented. The radiographic characteristics of the lesion and histopathologic finding were not consistent with this diagnosis, although the location is not rare. The first medical examination revealed lytic lesion with lateral cortical resorption and periosteal reaction radiographically. Histologically, unexpected granulomata were observed inside the lesion. It cannot be ruled out that this unusual finding may be related to previous documented trauma, resulting in interstitial hemorrhages and subsequent reactive resorptive processes.
A final diagnosis was obtained through the second surgical intervention and histopathologic finding.