Abstract
Osteoid-osteoma is sometimes reported in Western countries, but is very rare in Japan. Osteoid-osteoma of paranasal sinuses is a rare disease anywhere in the world. We report here the first case in Japan of osteoid-osteoma of the frontal sinus associated with eye symptoms. The patient was a 13-year-old boy with exophthalmus, decreased visual acuity and diplopia. The patient was treated by surgical removal of the tumor by Killian's technique. The defect of the upper orbital edge was repaired with iliac bone fragments. We also present a statistical analysis of osteoma and osteoid osteoma of paranasal sinuses origin.
