脊髓背侧蛛网膜网带的MRI表现

MRI Findings of Dorsal Spinal Arachnoid Web

摘要: 目的：评估脊髓背侧蛛网膜网带的影像学特征、临床特征及其与脊髓空洞的关系，探讨手术干预的效果。方法：对青岛大学附属医院2023年至2025年诊断为脊髓背侧蛛网膜网带的具有“手术刀征”的4名患者进行回顾性的研究。对临床表现、影像学表现、手术疗效进行了评估，并对解剖学及病理生理学机制进行了讨论。结果：本研究中4名脊髓背侧蛛网膜网带的患者好发部位是中上段胸椎，2名患者合并脊髓空洞(50%)。2名(50%)患者接受了网膜束带切除术。术后，2名患者症状均改善。结论：脊髓背侧蛛网膜网带是一种罕见的脊髓压迫原因，影像学表现为典型的“手术刀征”，可与继发性脊髓空洞相关，手术治疗后效果显著。

Abstract: Objective: To evaluate the imaging features, clinical characteristics of the dorsal spinal arachnoid web and its relationship with syringomyelia, and to explore the effect of surgical intervention. Methods: A retrospective study was conducted on 4 patients diagnosed with dorsal spinal arachnoid web with “scalpel sign” in the Affiliated Hospital of Qingdao University from 2023 to 2025. The clinical manifestations, imaging findings and surgical efficacy were evaluated, and the anatomical and pathophysiological mechanisms were discussed. Results: The predilection site of the 4 patients with dorsal spinal arachnoid web in this study was the upper-middle thoracic spine, and 2 patients were complicated with syringomyelia (50%). Two patients (50%) underwent arachnoid web resection. After surgery, the symptoms of both 2 patients were improved. Conclusion: Dorsal spinal arachnoid web is a rare cause of spinal cord compression. Its typical imaging manifestation is the “scalpel sign”, which may be associated with secondary syringomyelia, and the effect of surgical treatment is significant.