Accessory bones around the elbow are scarce, with a reported mean incidence rate of 0.77%. The rarest one is the os supratrochleare anterius, with only a handful of documented cases in the literature. Despite their scarcity, various types of ossicles have been documented, posing diagnostic challenges and potential misinterpretation on X-rays. Herein, we report a case of an accidentally found os supratrochleare anterius in a 43-year-old pig farmer presenting with symptoms of tennis elbow. After conservative treatment with nonsteroidal anti-inflammatory drugs and physiotherapy, he made a full recovery within 2 weeks. This report emphasizes the rarity of the ossupra trochleare anterius, the importance of accurate diagnosis, and the need for continued research and awareness of this anatomical variation.

肘部周围的副骨很少，据报道平均发病率为 0.77%。最罕见的是前滑车上骨，文献中只有少数有记录的病例。尽管数量稀少，但各种类型的小骨已被记录下来，这给诊断带来了挑战，并可能对 X 射线造成误解。在此，我们报告一例意外发现的 43 岁养猪户出现前滑车上骨的病例，该养猪户出现网球肘症状。经过非甾体抗炎药保守治疗和物理治疗，2周内完全康复。本报告强调了前滑车的罕见性、准确诊断的重要性以及继续研究和认识这种解剖变异的必要性。