The traumatic aneurysm of intracranial vessels. 
From our observations of two patients, the problems of traumatic intracranial aneurysm are discussed.  The prerequisites for recognition of such an aneurysm are the clinical findings, especially the angiographic control of the course of the aneurysm and, if possible, the results of histological examination.  The difficulties involved in passing an opinion on such cases are alluded to.