title: Intraosseous lipoma of the third lumbar spine: a case report.
abstract: BACKGROUND
  Intraosseous lipoma is a benign bone tumor, and the tumor occurs more frequently in the lower extremities. We present a very rare case of intraosseous lipoma occurring in the lumbar vertebral arch and spinous process.
  
  
  METHODS
  A 54-year-old Japanese man presented with a three-month history of lumbar pain. Magnetic resonance imaging of the L3 vertebral arch and spinous process revealed high intensity on T1- and T2-weighted imaging, and it was suppressed on fat-suppression imaging and no enhancement showed on gadolinium contrast-enhanced imaging. Computed tomography imaging revealed an osteolytic change accompanied by marginal osteosclerosis in his third lumbar vertebral arch and spinous process, as well as a thinned and bulging bone cortex. An analgesic had been administered prior to his visit, but low back pain had persisted, so we performed curettage and filled the defect with hydroxyapatite bone. His low back pain was improved immediately after surgery, and no recurrence of tumor has been observed on computed tomography imaging as of three years postoperatively.
  
  
  CONCLUSIONS
  Symptomatic intraosseous lipoma of spine is very rare, but the patient may be surgically well-treated by curettage and reconstruction of the benign tumor.
authors.affiliation: Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie, 514-8507, Japan. teekha_c@hotmail.com.|Department of Orthopedic Surgery, Thammasat University Hospital, 2 Prachan Road, Bangkok, 10200, Thailand. teekha_c@hotmail.com.
authors.forename: Chaipond
authors.initials: C
authors.lastname: Teekhasaenee
authors.affiliation: Department of Orthopedic Surgery, Saiseikai Matsusaka General Hospital, 1-15-6 Asahi-cho, Matsusaka city, Mie, 515-8557, Japan. kitatatakitata@docomo.ne.jp.
authors.forename: Koji
authors.initials: K
authors.lastname: Kita
authors.affiliation: Department of Orthopedic Surgery, Saiseikai Matsusaka General Hospital, 1-15-6 Asahi-cho, Matsusaka city, Mie, 515-8557, Japan. tkbanboo@gmail.com.
authors.forename: Kenji
authors.initials: K
authors.lastname: Takegami
authors.affiliation: Department of Orthopedic Surgery, Saiseikai Matsusaka General Hospital, 1-15-6 Asahi-cho, Matsusaka city, Mie, 515-8557, Japan. eijikawa17@yahoo.co.jp.
authors.forename: Eiji
authors.initials: E
authors.lastname: Kawakita
authors.affiliation: Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie, 514-8507, Japan. sakakitoshi@mac.com.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Sakakibara
authors.affiliation: Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu city, Mie, 514-8507, Japan. ykasai@clin.medic.mie-u.ac.jp.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kasai
mesh_terms: D001672:Biocompatible Materials; D003475:Curettage / Q000379:methods; D017886:Durapatite; D006801:Humans; D008067:Lipoma / Q000175:diagnosis / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000473:pathology / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013125:Spinal Neoplasms / Q000175:diagnosis / Q000601:surgery*; D014057:Tomography, X-Ray Computed
chemical_list: D001672:Biocompatible Materials; D017886:Durapatite