Ultrasound-assisted lumbar puncture with a horizontal and perpendicular paramedian approach based on positioning in patients with abnormal spinal anatomy: a case report and technical description.

"Declarations Ethics approval and consent to participateThis study was approved by the Research Ethics Committee of The First Affiliated Hospital, Sun Yat-Sen University in Guangzhou, China (Ref: [2022]413). Consent for publicationWritten consent was obtained from the patients for the publication of this case report, along with the radiological images and photographs. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This work was supported by grants from the Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation (No. pdjh2023a0003 to Yuanjia Zhang, and No. pdjh2023b0009 to Wei Luo, respectively)."