title: Cyst of the ligamentum flavum--case report.
abstract: An 86-year-old man presented with intermittent claudication caused by a cyst of the ligamentum flavum. Lumbar magnetic resonance imaging demonstrated an extradural cystic mass at the L5-S1 intervertebral space and canal stenosis at the L4-5 space. L-5 laminectomy and flavectomy at the L4-5 and L5-S1 spaces were performed, and the cystic mass was excised. The histological features were consistent with cyst of the ligamentum flavum. The histological diagnosis was ganglion cyst of the ligamentum flavum. After surgery, claudication completely disappeared and the patient made a good recovery.
authors.affiliation: Spine and Spinal Cord Center, Tokyo Mita Hospital, International University of Health and Welfare, Japan. spine-ns@sb.dcns.ne.jp
authors.forename: Shunji
authors.initials: S
authors.lastname: Asamoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Jimbo
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Fukui
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Doi
authors.forename: Hajime
authors.initials: H
authors.lastname: Sakagawa
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ida
authors.forename: Manabu
authors.initials: M
authors.lastname: Takahashi
authors.forename: Naoki
authors.initials: N
authors.lastname: Shiraishi
mesh_terms: D000369:Aged, 80 and over; D045888:Ganglion Cysts / Q000175:diagnosis* / Q000601:surgery*; D006801:Humans; D017843:Ligamentum Flavum; D008297:Male