[Clinical aspects, therapy and morphology of epidermoids in the 3d ventricle]

Statistically, there is one epidermoid in the IIIrd ventricle among 10000 space occupying intracranial processes. The symptoms are uncharacteristic. The surgical accesses to the IIIrd ventricle are discussed on the basis of examples of such cases. When a foramen monroi blockade is present, the tranventricular approach via the right anterior horn appears to be advisable. The epidermoids in the IIIrd ventricle are frequently changed in a considerably regressive manner and thus cystic. As malformations they are probably identical with the so-called foramen Monroi cysts and the Septum Pellucidum cysts.