title: A case of organized arachnoid cyst with repeated hemorrhage.
abstract: Hemorrhage sometimes occurs within arachnoid cysts, however, organized arachnoid cysts has not been reported. We speculate the previous invasive stress or some kind of infection may have triggered the formation of the organized membrane, which may have formed via a similar mechanism to that for organized chronic subdural hematomas.
authors.affiliation: Department of Neurosurgery St. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kobayashi
authors.affiliation: Department of Neurosurgery t. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan; Division of Emergency and Disaster Center St. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan.
authors.forename: Goro
authors.initials: G
authors.lastname: Nagashima
authors.affiliation: Department of Neurosurgery St. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Noda
authors.affiliation: Division of Emergency and Disaster Center St. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan.
authors.forename: Akihito
authors.initials: A
authors.lastname: Kato
authors.affiliation: Department of Neurosurgery St. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Morishima
authors.affiliation: Department of Hospital Pathology St. Marianna University Kawasaki Municipal Hospital 1-30-37 Shukugawara Tama-ku Kawasaki-city Kanagawa 214-8525 Japan.
authors.forename: Junki
authors.initials: J
authors.lastname: Koike
keywords: Arachnoid cyst; endovascular surgery; organized; repeated hemorrhage