Accurate diagnosis and treatment of sacral meningeal cysts without spinal nerve root fibres: identifying leakage orificium using high-resolution spherical arbitrary-dimensional reconstructing magnetic resonance imaging.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The reviewer HT declared a shared affiliation with the author JS to the handling editor at the time of review."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This work was supported by the National Natural Science Foundation of China (42293324 to JS; 82371319 to CY), Beijing Nova Program (20230484356 to CY), Beijing Natural Science Foundation (7222217 to CY), the Capital Health Research and Development of Special (2022-4-40918 to CY), AO Spine Research Start-up Grant (AOS-Startup-21-016 to CY), and Peking University Third Hospital Clinical Key Project (BYSYZD2021023 to CY)."