[Osteoma of the mastoid].

Osteoma of the mastoid is a osseous, benign and infrequent tumour. To date approximately 50 such cases in the world, and 7 cases in Spain have been described. Clinically this tumours are asymptomatic, except by cosmetic deformities, and are usually unsuspected roentgenographic findings. Treatment is surgical through a postauricular approach. A case of osteoma of the mastoid and a review of the literature is presented.