[Subarachnoid hemorrhage of unknown origin].
An analysis upon the incidence of sine materia SAH is done concerning the period before and after the availability of CT-scan. Furthermore, cases of SAH affecting the perimesencephalic cisterns, where the source of bleeding is in the majority not detectable are reported. The evolution of these SAH is generally favourable. Different groups of diffuse SAH, diagnosed sine materia at the first angiographic study, have to be submitted to a further short term angiography. In these cases, high risks to detect aneurysms affecting the anterior or posterior circulation are take into consideration. New technologies, i.e. angio-TC, provided by spiral-TC, or angio-RM may help to achieve a more precise and reliable diagnosis in patients with sine materia SAH.
Infuso
L
L
Clinica Neurologica, Università degli Studi, Pavia.
D006801:Humans; D011379:Prognosis; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology
L'emorragia subaracnoidea sine materia.