Resumen

YORIS, Orlando et al. Deformity by a Trabecular Juvenile Active Ossifying Fibroma: A case report. Acta odontol. venez [online]. 2009, vol.47, n.2, pp.411-417. ISSN 0001-6365.

The juvenile active ossifying fibroma, trabecular type, is a histological variant of ossifying fibroma, which belong to the benign fibrous osseous lesions family, being its common feature the replacement of medullar bone by fibrous tissue with variable quantity of bone and/or cementoide. It is found on the cranial facial bones in 12 to 15 years old patients, behaving in an aggressive fashion. The purpose of this paper is to report, a sixteen years old male patient, who went for consultation to the oral surgery service at this institution, due to a marked right facial asymmetry, asymptomatic, for five years. The computerized tomography showed a mass involving right maxillary sinus and nasal cavity, extending to the inferior border of the orbit enclosing the homologous structures on the left side. The incisional biopsy revealed a trabecular juvenile active ossifying Fibroma. The excisional biopsy confirmed this diagnosis. It is shown how this lesion is capable to cause a marked facial asymmetry and how is important the microscopic study of the lesions in order to get a precise diagnosis.

Palabras clave : Fibrous osseous; trabecular; ossifying fibroma; juvenile.