Recep Tayyip Erdogan University, School of Medicine, Department of Neurosurgery, Rize, Turkey.
Turk Neurosurg. 2022;32(2):237-243. doi: 10.5137/1019-5149.JTN.34649-21.2.
To determine the relationship between the occurrence of lumbar L4-5 disc herniation (LDH) and the size of psoas muscles.
The cross-sectional areas (CSAs) of the psoas muscles were measured at the L4-5 disc level on axial MRI of patients with LDH who were admitted to the hospital between 1 January 2020 and 1 June 2020. The patients were divided into three groups according to the involvement side of LDH as the patients without disc (Group I), right side disc (Group II), and left side disc (Group III). The relationship of ipsilateral and the opposite side of the CSA of PM in the control group and the patients with LDHs was analyzed.
This retrospective study included 65 patients (ages between 20 and 70 years) whose mean age is 42, 12. The mean values of the right side cross-sectional area of PM were 12.09 cm2 in Group I (n=18), 12.84 cm2 in Group II (n=20), and 14.15 cm2 in Group III (n=27), The left side values were 12.08 cm2, 13.22 cm2, 14.00 cm2 in Group I, II, and III, respectively. The difference between right and left side CSA of PM is that values of patients with left-sided LDHs were higher than those of the control and right-sided LDH group, and the difference was statistically significant. A strong correlation was observed between the left and right side of the cross-sectional area of psoas muscle at the L4-5 level (p < 0.05).
This study shows that there are reciprocal changes in the cross-sectional area of the psoas muscle in patients with L4-5 lumbar disc herniation.
确定腰椎 L4-5 椎间盘突出症（LDH）的发生与腰大肌大小之间的关系。
对 2020 年 1 月 1 日至 2020 年 6 月 1 日期间因 LDH 住院的患者的 MRI 轴位图像上 L4-5 椎间盘水平的腰大肌横截面积（CSA）进行测量。根据 LDH 的受累侧，将患者分为三组：无椎间盘组（Group I）、右侧椎间盘组（Group II）和左侧椎间盘组（Group III）。分析对照组和 LDH 患者 CSA 同侧和对侧 PM 的关系。
本回顾性研究共纳入 65 例年龄在 20 至 70 岁之间的患者，平均年龄为 42.12 岁。Group I（n=18）右侧 PM 的 CSA 平均值为 12.09 cm2，Group II（n=20）为 12.84 cm2，Group III（n=27）为 14.15 cm2，左侧 PM 的 CSA 分别为 12.08 cm2、13.22 cm2和 14.00 cm2。左侧 CSA 的值大于对照组和右侧 LDH 组，差异有统计学意义。在 L4-5 水平，腰大肌 CSA 的左右两侧之间存在很强的相关性（p < 0.05）。
本研究表明，L4-5 腰椎间盘突出症患者的腰大肌 CSA 存在相互变化。
