Arachnoid cyst
4.Results Of the 100 cases,51 were acoustic neuroma,18 were meningioma,3 were trigeminal neuroma,15 were epidermoid cyst,4 were arachnoid cyst,4 were hemagioblastoma,2 were ependymocytoma,3 were cerebellar astrocytoma. Male(41 cases)and female(59 cases)are between 16～74 years old,The average age is 48.8 years.
5.239 cases(45.3%) were diagnosed as myelomeningocele, 123 cases(23.3%) were meningocele, 107 (20.3%) were spinal bifida with lipoma, and 59 cases of spinal bifida occulta (1.2%). Surgical removal of the arachnoid cyst and lipoma relieved compression of the spinal dural sac and the tethered spinal cord.
6.Methods Thirty-four patients with surgically and pathologically proved pontocerebellar tumors in which acoustic neuroms were found in 20,meningiomas in 4,trigeminalneuroms in 3,hemangioblastomas in 2,and arachnoid cyst,cholesteatoma,aneurysm,glioma,metastasis in 1 each underwent SE and FSE MR imaging before and after intravenous administration of Gd-DTPA.
