“…The clinical symptoms were related to subarachnoid hemorrhage (headache, nuchal rigidity and vomiting) in three cases 7,10,11 , local compression of adjacent nerve roots (low back pain and sciatica, sensitive and motor disturbance of the lower limbs, sphincter dysfunction) in six 5,6,8,[11][12][13][14] , and, in two cases, symptoms of intracranial hypertension caused by hydrocephalus 9,12 .The symptoms usually had acute onset in the subarachnoid hemorrhage patients, in the hydrocephalus patients the symptoms started four and three months before admission, and when the symptoms were related with expansive process, the average of beginning of symptoms ranged between ten days and nine years. In all previously reported cases, as in ours, the tumor was totally removed despite their close adherence to the nerve roots.…”