Osteomas, benign bone-forming tumors, commonly originate in the paranasal sinuses in the head and neck. In the temporal bone, exostosis of the external auditory canal is common but mastoid osteomas are rare.
We present two cases of osteoma of the external auditory canal and one of the mastoid bone. Surgical removal and pathological study confirmed the diagnosis. We also discuss differences and surgical therapies in exostosis and osteoma.