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[Purpose] We analyzed the relation of postoperative axial pain and computed tomography (CT) findings of cervical extensor muscles after laminoplasty. [Subjects] The subjects were 18 patients (male: 15, mean age: 64.9 y.o.) who underwent the laminoplasty. [Method] The patients followed up were classified into two groups, that is, one group including the patients suffering from axial pain (P group: n=8), and the other group including the patients without axial pain (N group: n=10). The degree of pain was evaluated with visual analogue scale (VAS). We compared the multiple factors between two groups at the point of one year after surgery. Analyzed factors related to occurring axial pain and its degree were patient’s basic characteristics and CT factors. [Results] In P group, the crosssectional area of cervical extensor muscles significantly increased (p<0.05), and density value of CT of them significantly decreased (p<0.05) compared with N group. And also, the degree of axial pain was significantly related to the increasing of cross-sectional area and the decreasing of density value of CT of cervical extensor muscles [Conclusion] It was suggested that the alteration of cross-sectional area and density value of CT of cervical extensor muscles were related to postoperative axial pain.

The relation of postoperative axial pain and computed tomography findings of cervical extensor muscles after laminoplasty