title: Posteriorly migrated thoracic disc herniation: a case report.
abstract: BACKGROUND
  Posterior epidural migration of thoracic disc herniation is extremely rare but may occur in the same manner as in the lumbar spine.
  
  
  METHODS
  A 53-year-old Japanese man experienced sudden onset of incomplete paraplegia after lifting a heavy object. Magnetic resonance imaging revealed a posterior epidural mass compressing the spinal cord at the T9-T10 level. The patient underwent emergency surgery consisting of laminectomy at T9-T10 with right medial facetectomy, removal of the mass lesion, and posterior instrumented fusion. Histological examination of the mass lesion yielded findings consistent with sequestered disc material. His symptoms resolved, and he was able to resume walking without a cane 4 weeks after surgery.
  
  
  CONCLUSIONS
  Pre-operative diagnosis of posterior epidural migration of herniated thoracic disc based on magnetic resonance imaging alone may be overlooked, given the rarity of this pathology. However, this entity should be considered among the differential diagnoses for an enhancing posterior thoracic extradural mass.
authors: Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita, 010-8543, Japan. miyakosh@doc.med.akita-u.ac.jp.
authors: Naohisa
authors: N
authors: Miyakoshi
authors: Michio
authors: M
authors: Hongo
authors: Yuji
authors: Y
authors: Kasukawa
authors: Yoshinori
authors: Y
authors: Ishikawa
authors: Yoichi
authors: Y
authors: Shimada
references: Neuroradiology. 1999 Sep;41(9):630-5
references: 10525762
references: J Spinal Disord Tech. 2005 Dec;18(6):544-6
references: 16306848
references: J Korean Neurosurg Soc. 2008 May;43(5):239-41
references: 19096604
references: Neurol Med Chir (Tokyo). 1999 Oct;39(11):769-72
references: 10598446
references: Acta Orthop Belg. 2009 Jun;75(3):423-7
references: 19681334
references: Spine J. 2003 Jan-Feb;3(1):82-6
references: 14589251
references: Neurosurgery. 1991 Feb;28(2):180-6
references: 1997885