Chronic expanding hematoma after spinal surgery

Background contextChronic expanding hematoma after spinal surgery is extremely rare, with no case previously reported in the literature.PurposeTo report a rare case of a chronic expanding hematoma of the spine that occurred 24 years after thoracic laminectomy and spinal cord tumor resection.Study designCase report.MethodsA 71-year-old man presented with a spinal mass located approximately at the level of the sixth thoracic vertebral body. The patient had undergone thoracic laminectomy with tumor resection 24 years previously. The mass had appeared 5 years after this and had gradually enlarged over 19 years.ResultsThe tumor was resected en bloc. The lamina and spinous processes had been partially eroded by the tumor at the fifth and sixth thoracic vertebrae, but the dura was intact. Histopathologic examination confirmed the diagnosis of chronic expanding hematoma. The hematoma had not recurred at the 1-year follow-up.ConclusionWe report herein an extremely rare case of chronic expanding hematoma after spinal surgery. This entity may be considered a late complication after surgery regardless of the number of years that have passed since the index surgery.