title: Chronic subdural hematoma associated with arachnoid cyst. Two case histories with pathological observations.
abstract: Arachnoid cysts are well known to induce chronic subdural hematoma (CSDH) after head injury. However, histological observations of the arachnoid cyst and hematoma membrane have only been rarely described. An 8-year-old boy and a 3-year-old boy presented with CSDH associated with arachnoid cyst. Surgical removal of the hematoma and biopsy of the hematoma membrane and cyst wall were performed. Clinical courses were good and without recurrence more than 1.5 years after surgery. Histological examination suggested that the cysts did not contribute to hematoma development. Pediatric hematoma membranes, similar to adult hematoma membranes, are key in the growth of CSDH. Therefore, simple hematoma evacuation is adequate as a first operation for CSDH associated with arachnoid cyst.
authors.affiliation: Department of Neurosurgery, Kitakyushu General Hospital, Kitakyushu, Fukuoka, Japan. ttakayasu-nsu@umin.ac.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Takayasu
authors.forename: Kunyu
authors.initials: K
authors.lastname: Harada
authors.forename: Shigeru
authors.initials: S
authors.lastname: Nishimura
authors.forename: Jun
authors.initials: J
authors.lastname: Onda
authors.forename: Tohru
authors.initials: T
authors.lastname: Nishi
authors.forename: Hisashi
authors.initials: H
authors.lastname: Takagaki
mesh_terms: D000058:Accidental Falls; D001099:Arachnoid / Q000473:pathology / Q000503:physiopathology; D016080:Arachnoid Cysts / Q000150:complications* / Q000473:pathology* / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D003399:Craniotomy / Q000379:methods; D019299:Decompression, Surgical / Q000379:methods; D016489:Head Injuries, Closed / Q000150:complications*; D020200:Hematoma, Subdural, Chronic / Q000209:etiology* / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D013355:Subdural Space / Q000473:pathology / Q000503:physiopathology; D016896:Treatment Outcome