Concomitant Peripheral Giant Cell Lesion and Traumatic Bone Cyst in the Mandible: a Rare Case Report

Abstract

Synchronous lesions of the jaws are reported here. A 14-year-old girl presented with a reddish sessile nodule in the mandibular left premolar gingival region. Radiographically, a well-defined radiolucent area involving the left mandibular body was observed. Incisional biopsy of the extraosseous lesion was performed, and a giant cell lesion was histopathologically diagnosed. Another surgical intervention was planned. However, the patient returned 2 years later with both intra- and extraosseous lesions with increased sizes. A surgical exploratory procedure in the bone lesion revealed an empty cavity; curettage to stimulate bleeding was performed, in addition to excision of the extraosseous lesion. The final diagnosis was synergistic peripheral giant cell lesion and traumatic bone cyst. The 12 month follow-up did not show any relapse. Besides, neoformation of the entire bone was observed. The pathogenesis of both the lesions remains uncertain; one hypotheses is local trauma leading to development of a reactive disease.