[Expansive mass of the posterior region of the 3d ventricle (tumors of the pineal region)].

Tumours of the pineal region are rare. Clinical and CT aspects, and results of the treatment of 12 cases observed in a 5 years period (1979-1984) are described. The authors consider the supracerebellar infratentorial approach, formerly described by Krause in 1926 and reintroduced by Stein in 1971, the best for the surgical management of these tumours.