Abstract：
BACKGROUND: The aim of this anatomical study was to evaluate the course of the extensor pollicis longus (EPL) tendon, its positional relationship to adjacent structures, and the resulting clinical relevance under consideration of various functional positions.
METHODS: Twenty upper extremities from ten adult human cadavers embalmed using Thiel\'s method were included in this study. The greatest possible movement/slippage of the EPL tendon, the angle at which the tendon wraps around Lister\'s tubercle, and its course across the extensor carpi radialis longus and brevis (ECRL and ECRB) were recorded and defined in all functional positions.
RESULTS: Our findings demonstrate a high range of motion of the tendon in relation to clinically relevant structures.
CONCLUSIONS: Understanding the anatomical course of the EPL tendon, its potential extent of movement, and its resulting positional changes is essential for the diagnosis and surgical treatment of patients with complaints or injuries in the dorsoradial wrist region.
METHODS: Twenty upper extremities from ten adult human cadavers embalmed using Thiel\'s method were included in this study. The greatest possible movement/slippage of the EPL tendon, the angle at which the tendon wraps around Lister\'s tubercle, and its course across the extensor carpi radialis longus and brevis (ECRL and ECRB) were recorded and defined in all functional positions.
RESULTS: Our findings demonstrate a high range of motion of the tendon in relation to clinically relevant structures.
CONCLUSIONS: Understanding the anatomical course of the EPL tendon, its potential extent of movement, and its resulting positional changes is essential for the diagnosis and surgical treatment of patients with complaints or injuries in the dorsoradial wrist region.
摘要：
背景：这项解剖学研究的目的是评估长伸肌（EPL）肌腱的过程，它与相邻结构的位置关系，以及在考虑各种功能位置时产生的临床相关性。
方法：本研究包括使用Thiel方法进行防腐处理的10名成人尸体的20个上肢。EPL肌腱的最大可能的移动/滑动，肌腱缠绕李斯特结节的角度，并在所有功能位置记录并定义了其穿过radial腕长和短伸肌的过程（ECRL和ECRB）。
结果：我们的发现表明，与临床相关结构相关的肌腱有很大的运动范围。
结论：了解EPL肌腱的解剖过程，其潜在的运动范围，其导致的位置变化对于背背腕部有主诉或损伤的患者的诊断和手术治疗至关重要。
方法：本研究包括使用Thiel方法进行防腐处理的10名成人尸体的20个上肢。EPL肌腱的最大可能的移动/滑动，肌腱缠绕李斯特结节的角度，并在所有功能位置记录并定义了其穿过radial腕长和短伸肌的过程（ECRL和ECRB）。
结果：我们的发现表明，与临床相关结构相关的肌腱有很大的运动范围。
结论：了解EPL肌腱的解剖过程，其潜在的运动范围，其导致的位置变化对于背背腕部有主诉或损伤的患者的诊断和手术治疗至关重要。
