Fibro-Osseous Lesion Associated with Central Giant Cell Granuloma: A Rare Hybrid Lesion of the Anterior Mandible

Hybrid lesions have been reported in literature as lesions consisting of a combination of characteristics from different pathologies. In this article we document a case where a collision tumor of central giant cell granuloma and juvenile trabecular ossifying fibroma co-existed in the mandible. Only a few cases of similar conditions were documented in literature. An 18-year-old female presented with an unusually painful swelling in the symphysis and parasymphysis region bilaterally. Although the two-dimensional imaging suggested an enlarged cystic lesion, the CBCT revealed a well-defined multi-locular hypodense lesion with hyperdense foci, buccal cortical expansion, and lingual cortical perforation suggesting a more aggressive pathology. Curettage, peripheral ostectomy and apicectomy to the associated teeth were the treatment modalities performed. Six months postoperatively, tooth mobility had resolved, and trabecular bone formation was evident in the parasymphysis region. The co-existence of central giant cell granuloma and juvenile trabecular ossifying fibroma is to be considered on observing the clinical and radiographic pictures of both in the same case.