Hemorrhage in the brain may be extraventricular or intraventricular. In the latter case the blood may originate in the ventricle itself and produce a primary ventricular hemorrhage. In the first, the original seat of the hemorrhage is the tissue surrounding the ventricle and the ventricle itself is only secondarily involved. Secondary effusion of blood into cerebral ventricles is not an infrequent phenomenon, while a primary hemorrhage within the ventricular cavity is rather a rare occurrence, judging from the meager literature on the subject. Not many records are to be found on primary intraventricular hemorrhage. Nevertheless, sufficient data have been accumulated to deserve a special description.
The mechanism of formation, the pathology, the course, the symptomatology of ventricular hemorrhages have been somewhat differently considered by various authors who have had the opportunity to observe such findings. All writers, however, concur in the belief that this form of cerebral