1. Stehbens reviewed 11 series reported from 1950-69 and found aneurysm as the source of SAH in 18-76% of the cases.'9 Other causes include trauma, cerebral and spinal vascular malformations, intrinsic and extrinsic cranial and spinal neoplasms, pathological and iatrogenic coagulopathy, collagen vascular disease, sickle cell anaemia, cerebral infarction, and drug abuse. For the purposes of discussion we will divide SAH into distinct categories of aneurysmal and non-aneurysmal SAH. Although some overlap exists in the medical management of SAH in both categories, aneurysmal SAH presents unique surgical management circumstances that will be discussed separately. We will focus the following discussion on the diagnosis and treatment of both aneurysmal and non-aneurysmal SAH
2. Anatomy, a regional atlas of the human body;Clemente, C.D.,1987
3. The subarachnoid Cisterns. An anatomic and Roentgenologic study;Liliequist, B.;Acta Radiol (Stockholm),1959
4. Al-Mefty 0. The "subdural" space: a new look at an outdated concept;Haines, D.E.; Harkey, H.L.;Neurosurg,1993
5. Intracranial aneurysms and subarachnoid hemorrhage;Sahs, A.; Perret, G.E.; Locksley, H.B.; Nishioka, H.;Philadelphia: J B Lippincott,1969