[Extracanalicular osteomas of the temporal bone: three cases].

Osteoma is a slow-growing tumor formed by mature bone tissue. In the temporal bone, intracanalicular osteomas are more frequent than extracanalicular osteomas. In Spain, only twelve cases of extracanalicular tumors of the temporal bone have been described in the literature. We present three new cases of extracanalicular osteoma (mastoids). The clinical and radiological features of each case are described and the relevant literature is reviewed.