Elsner Clara, Kunz Andreas Steven, Wagner Nicole, Huflage Henner, Hübner Stefan, Luetkens Karsten Sebastian, Bley Thorsten Alexander, Schmitt Rainer, Ergün Süleyman, Grunz Jan-Peter
Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany.
Institute of Anatomy and Cell Biology, University of Würzburg, Koellikerstr. 6, 97070 Würzburg, Germany.
Diagnostics (Basel). 2023 Jul 19;13(14):2406. doi: 10.3390/diagnostics13142406.
Recent dissection studies resulted in the introduction of the term "chiasma antebrachii", which represents an intersection of the flexor digitorum superficialis (FDS) tendons for digits 2 and 3 in the distal third of the forearm. This retrospective investigation aimed to provide an MRI-based morphologic analysis of the chiasma antebrachii. In 89 patients (41 women, 39.3 ± 21.3 years), MRI examinations of the forearm (2010-2021) were reviewed by two radiologists, who evaluated all studies for the presence and length of the chiasma as well as its distance from the distal radioulnar and elbow joint. The chiasma antebrachii was identified in the distal third of the forearm in 88 patients (98.9%), while one intersection was located more proximally in the middle part. The chiasma had a median length of 28 mm (interquartile range: 24-35 mm). Its distances to the distal radioulnar and elbow joint were 16 mm (8-25 mm) and 215 mm (187-227 mm), respectively. T1-weighted post-contrast sequences were found to be superior to T2- or proton-density-weighted sequences in 71 cases (79.8%). To conclude, the chiasma antebrachii is part of the standard FDS anatomy. Knowledge of its morphology is important, e.g., in targeted injections of therapeutics or reconstructive surgery.
近期的解剖学研究引入了“前臂交叉”这一术语，它指的是在前臂远侧三分之一处，示指和中指的指浅屈肌腱（FDS）相互交叉。这项回顾性研究旨在对前臂交叉进行基于磁共振成像（MRI）的形态学分析。在89例患者（41名女性，年龄39.3±21.3岁）中，两名放射科医生回顾了2010年至2021年期间的前臂MRI检查，评估了所有研究中前臂交叉的存在情况、长度以及其与远侧桡尺关节和肘关节的距离。88例患者（98.9%）在前臂远侧三分之一处发现了前臂交叉，而有一处交叉位于更靠近近端的中部。前臂交叉的中位长度为28毫米（四分位间距：24 - 35毫米）。其与远侧桡尺关节和肘关节的距离分别为16毫米（8 - 25毫米）和215毫米（187 - 227毫米）。在71例（79.8%）病例中，发现T1加权增强序列优于T2加权或质子密度加权序列。总之，前臂交叉是指浅屈肌标准解剖结构的一部分。了解其形态很重要，例如在进行靶向治疗注射或重建手术时。
