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논문 기본 정보

자료유형
학술저널
저자정보
Seiji Ohtori (Chiba University) Sumihisa Orita (Chiba University) Kazuyo Yamauchi (Chiba University) Yawara Eguchi (Chiba University) Yasuchika Aoki (Chiba University) Junichi Nakamura (Chiba University) Tetsuhiro Ishikawa (Chiba University) Masayuki Miyagi (Chiba University) Hiroto Kamoda (Chiba University) Miyako Suzuki (Chiba University) Gou Kubota (Chiba University) Kazuhide Inage (Chiba University) Takeshi Sainoh (Chiba University) Jun Sato (Chiba University) Yasuhiro Shiga (Chiba University) Koki Abe (Chiba University) Kazuki Fujimoto (Chiba University) Hirohito Kanamoto (Chiba University) Gen Inoue (Chiba University) Kazuhisa Takahashi (Chiba University)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.10 No.3
발행연도
2016.1
수록면
516 - 521 (6page)

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Study Design: Retrospective case series. Purpose: To classify back muscle degeneration using magnetic resonance imaging (MRI) and investigate its relationship with back pain after surgery. Overview of Literature: Back muscle injury and degeneration often occurs after posterior lumbar surgery, and the degeneration may be a cause of back pain. However, the relationship between back muscle degeneration and back pain remains controversial. Methods: A total of 84 patients (average age, 65.1 years; 38 men, 46 women) with lumbar spinal stenosis underwent posterior decompression surgery alone. MRI (1.5 tesla) was evaluated before and more than a year after surgery in all patients. Muscle on MRI was classified into three categories: low intensity in T1-weighted imaging, high intensity in T2-weighted imaging (type 1), high intensity in both T1- and T2-weighted images (type 2), and low intensity in both T1- and T2-weighted imaging (type 3). The prevalence of the types and their relationship with back pain (determined on a visual analog scale) were evaluated. Results: MRI revealed muscle degeneration in all patients after surgery (type 1, 6%; type 2, 82%; and type 3, 12%). Type 2 was significantly more frequent compared with types 1 and 3 (p <0.01). Low back pain was significantly improved after surgery (p <0.01). Low back pain was not associated with any MRI type of muscle degeneration after surgery (p >0.05). Conclusions: Various pathologies of back muscle degeneration after posterior lumbar surgery were revealed. Type 2 (fatty) change was most frequent, and other patients had type 3 (scar) or type 1 (inflammation or water-like) changes. According to the Modic classification of bone marrow changes, Modic type 1 change is associated with inflammation and back pain. However, no particular type of back muscle degeneration was correlated with back pain after surgery.

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