title: Remarkable epidural scar formation compressing the cervical cord after osteoplastic laminoplasty with hydroxyapatite spacer.
abstract: The authors report on an 81-year-old woman whose condition deteriorated 2 months after undergoing osteoplastic laminoplasty with placement of hydroxyapatite spacers. Magnetic resonance imaging showed postlaminectomy scar formation compressing the cervical spinal cord. The patient underwent laminectomy and removal of remarkably thick epidural scar tissue, which resulted in resolution of her symptoms. Histological diagnosis of the scar was fibrous granulation tissue with foreign body granuloma, characterized by multinucleated giant cells and marked increases of capillary vessels, fibroblasts, and collagen fibers. This case of symptomatic postlaminectomy scar formation after osteoplastic laminoplasty suggests that osteoplastic laminoplasty cannot always prevent laminectomy membrane formation.
authors.affiliation: Spinal Disorders Center, Fujieda Heisei Memorial Hospital, Fujieda, Shizuoka, Japan. kuraishikeita@yahoo.co.jp
authors.forename: Keita
authors.initials: K
authors.lastname: Kuraishi
authors.forename: Junya
authors.initials: J
authors.lastname: Hanakita
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Takahashi
authors.forename: Manabu
authors.initials: M
authors.lastname: Minami
authors.forename: Masanao
authors.initials: M
authors.lastname: Mori
authors.forename: Mizuki
authors.initials: M
authors.lastname: Watanabe
mesh_terms: D000369:Aged, 80 and over; D060826:Cementoplasty / Q000009:adverse effects*; D002921:Cicatrix / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D004388:Dura Mater / Q000473:pathology* / Q000601:surgery; D017886:Durapatite / Q000009:adverse effects*; D005260:Female; D005549:Foreign-Body Reaction / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007796:Laminectomy / Q000009:adverse effects*; D013117:Spinal Cord Compression / Q000209:etiology* / Q000473:pathology / Q000601:surgery
chemical_list: D017886:Durapatite