[Meningioma of the fourth ventricle]

Description of 2 rare cases of meningioma located in the 4th ventricle, of which only 21 other cases have been published, is followed by a review of the relevant literature. The authors point out that CT scan and selective vertebral angiography are the main laboratory investigation in making the diagnosis and total removal of the benign tumor can gain satisfactory result, although the tumor is difficult to be differentiated from ependymoma in naked eye.