Fig. 4
From: Ectopic gas in the fibular graft after anterior cervical corpectomy and fusion
A 65-year-old man underwent anterior cervical corpectomy and fusion due to cervical spondylotic myelopathy (Group II). A three-level corpectomy and a fibula graft were performed. The computed tomography image shows ectopic gas (arrow) in the fibular graft 3 months after surgery (A). The gas disappeared 6 months after surgery (B), but it appeared again (arrow) with bony erosion of the graft 1 year after surgery (C). Three months after graft breakage, the gas (arrow) remained with bony erosion of the graft (D). After additional posterior fusion, the gas disappeared as bone fusion was achieved (E, F)