Remarkable epidural scar formation compressing the cervical cord after osteoplastic laminoplasty wit

Journal of Neurosurgery: Spine, Volume 0, Issue 0, Page 1-5, Ahead of Print.

Keita Kuraishi, M.D., Ph.D., Junya Hanakita, M.D., Ph.D., Toshiyuki Takahashi, M.D., Ph.D., Manabu Minami, M.D., Ph.D., Masanao Mori, M.D., Ph.D., and Mizuki Watanabe, M.D. 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.


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