title: Differences on intraoperative ultrasonography between meningioma and neurilemmoma.
abstract: We examined the differences on intraoperative ultrasonography between 17 cases of meningioma and 29 of neurilemmoma, the common intradural extramedullary tumors. In meningiomas, cysts were rarely seen (in 12.5%, P < 0.01%) and echogenicity was high (in 82.3%, P < 0.01%). In neurilemmoma, many cysts were seen (72.5%) and low echoes tended to be more common (72.4%, P < 0.01%). In the neurilemmomas with high or isoechogenicity, Antoni A types, histologically rich in collagen fibres, predominated.
authors.affiliation: Department of Orthopaedic Surgery, Nihon University Surugadai Hospital, Tokyo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Matsuzaki
authors.forename: Y
authors.initials: Y
authors.lastname: Tokuhashi
authors.forename: K
authors.initials: K
authors.lastname: Wakabayashi
authors.forename: K
authors.initials: K
authors.lastname: Ishihara
authors.forename: M
authors.initials: M
authors.lastname: Iwahashi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002420:Cauda Equina / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007431:Intraoperative Complications / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008297:Male; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008579:Meningioma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D009442:Neurilemmoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D013116:Spinal Cord / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D013120:Spinal Cord Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D014463:Ultrasonography