Central odontogenic fibroma, granular cell variant

A case of central odontogenic fibroma (COF) of the epithelium-rich type (granular cell variant) is reported. A 46-year-old female, demonstrated a multilocular, septated radiolucency below and between the roots of the teeth in 44–47 region. On microscopy the lesion revealed an odontogenic fibroma of the epithelium-rich type with areas characterized by lobules of spherical cells of varying size containing fine S-100 negative granules. In addition, scattered foci of cementoid/osteoid calcified material occurred. Based on several studies, the present authors entertain the hypothesis that supports a histiocystic origin the granular cells. Therapy consisted of curettage of the lesion. The defect was filled with spongeous bone. No recurrence occurred after follow-up of two years.