title: Plexiform schwannoma.
abstract: We present a case of plexiform schwannoma, a rare benign peripheral nerve sheath tumour characterized by a multinodular and plexiform growth pattern, that had slowly grown for 40 years on the trunk of a 64-year-old woman. Preoperative biopsy findings, such as a high cellularity and the extent of nuclear atypia of the tumour, led us to suspect a malignant peripheral nerve sheath tumour; but ultimately a benign plexiform schwannoma was diagnosed based on an immunohistochemical review of the excised tumour using various markers including S-100 and Ki67 (MIB1).
authors.affiliation: Department of Dermatology, Kagoshima University Faculty of Medicine, Kagoshima, Japan. ken0913@m2.kufm.kagoshima-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Terasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Mera
authors.forename: H
authors.initials: H
authors.lastname: Uchimiya
authors.forename: Y
authors.initials: Y
authors.lastname: Katahira
authors.forename: T
authors.initials: T
authors.lastname: Kanzaki
mesh_terms: D014408:Biomarkers, Tumor / Q000378:metabolism; D001706:Biopsy; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000378:metabolism; D008875:Middle Aged; D009442:Neurilemmoma / Q000378:metabolism / Q000473:pathology*; D009418:S100 Proteins / Q000378:metabolism; D012878:Skin Neoplasms / Q000473:pathology*
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D009418:S100 Proteins