The cases of six patients with fronto-ethmoidal osteomas which have produced intracranial complications are reported. The patients have been divided in two groups depending on their clinical aspects, from cranio-facial deformities to exophtalmus, rinorrhea, pneumocephalus, meningitis and mucocele. A review of the literature is made and the importance of such lesions is stressed together with a critical analysis of the methods proposed for their surgical treatment. The results obtained with a frontal approach and a plastic closure of the dura were uniformelly good with restoration of functions in all patients.