Supplementary Material for: The 'Ballerina' Sign: Posterior capsular rupture during cataract surgery

Purpose:
Posterior capsular rupture (PCR) is a significant complication that can profoundly impact patients, surgeons, and other stakeholders within the healthcare system during cataract surgery. This case study aims to introduce a new clinical sign, the "Ballerina" sign, which could potentially indicate posterior capsular rupture (PCR) during cataract surgery.
Methods:
In this case report, during a cataract operation of a 70-year-old man, a spiraling fragment of the nucleus was observed attached to a vitreous string.
Results:
During the procedure, an anterior vitrectomy was performed with no further intraoperative complications and a 3-piece lens was inserted into the sulcus. Positive visual outcomes were observed during follow-up appointments on the first day, two weeks, and three months after the operation.
Conclusions:
The “Ballerina” sign documentation in the medical literature is novel, and we anticipate that it will provide ophthalmic surgeons with valuable insight during cataract surgeries for early detection of PCR.

【研究目的】后囊膜破裂（Posterior capsular rupture, PCR）是白内障手术过程中可对患者、外科医师及医疗体系内其他相关方造成严重影响的显著并发症。本病例研究旨在介绍一种全新的临床体征——"芭蕾舞者"体征（Ballerina sign），该体征或可在白内障手术中提示后囊膜破裂的发生。
【研究方法】本病例报告中，1名70岁男性患者接受白内障手术时，术者观察到一块螺旋状的晶状体核碎片附着于玻璃体条索之上。
【研究结果】手术过程中，术者实施了前段玻璃体切除术，未出现进一步的术中并发症，并将一片三片式人工晶状体（3-piece lens）植入睫状沟内。术后首日、术后2周及术后3个月的随访中，患者均获得了良好的视觉预后。
【研究结论】"芭蕾舞者"体征（Ballerina sign）在医学文献中的记载尚属首次，我们预计该体征可为眼科外科医师在白内障手术中早期识别后囊膜破裂提供极具价值的参考依据。