Juvenile psammomatoid ossifying fibroma of the orbit and paranasal sinuses. A case report.

Juvenile psammomatoid ossifying fibroma (JPOF) is an uncommon benign fibro-osseous lesion predominantly arising in the paranasal sinuses and orbits of children and young adults. We report a case of JPOF involving the paranasal sinuses and orbit in a 15-year-old boy that presented due to progressive proptosis and downward displacement of the left eye. The lesion, first described as fibrous dysplasia (FD), was totally removed surgically, and then proved to be a JPOF, by histopathology. We discuss its differential diagnosis with other fibro-osseous lesions, histopathological features, and treatment options.