 The patient was initially treated with Phenobarbital; then Dilantin was added (early 1970's); then Depakene was added ( early 1980's) due to poor seizure control. An EEG on 8/22/66 showed "Left mid-temporal spike focus with surrounding slow abnormality, especially posterior to the anterior temporal areas (sparing the parasagittal region). In addition, the right lateral anterior hemisphere voltage is relatively depressed. ...this suggests two separate areas of cerebral pathology." He underwent his first HCT scan in Sioux City in 1981, and this revealed an right temporal arachnoid cyst. The patient had behavioral problems throughout elementary/junior high/high school. He underwent several neurosurgical evaluations at UIHC and Mayo Clinic and was told that surgery was unwarranted. He was placed on numerous antiepileptic medication combinations including Tegretol, Dilantin, Phenobarbital, Depakote, Acetazolamide, and Mysoline. Despite this he averaged 2-3 spells a month. He was last seen, 6/19/95, and was taking Dilantin and Tegretol. His typical spells were described as sudden in onset and without aura. He frequently becomes tonic or undergoes tonic-clonic movement and falls with associated loss of consciousness. He usually has rapid recovery and can return to work in 20 minutes. He works at a Turkey packing plant. Serial HCT scans showed growth in the arachnoid cyst until 1991, when growth arrest appeared to have occurred.