由于高失败率和多个术后并发症，肘关节肿瘤切除和重建对于骨科医生来说是一个艰巨的挑战。三维打印技术的成熟使得复杂恶性肘关节肿瘤患者术前设计、术中导航和骨缺损重建得以简化。为了改善预后，本研究探讨了一种在三维打印技术辅助下进行肿瘤切除和肘关节重建的方法。患者3年前因左侧肾透明细胞癌行肾切除术，6个月前出现右肘关节活动受限和外侧触痛。肿瘤穿刺活检证实为肾透明细胞癌转移。细致的CT扫描数据获得，对上肢骨骼和关节进行三维重建，并模拟了病变组织切除。根据模型，制定了个体化的骨切割指南和肘关节假体，并进行了设计和制造。然后，在实际手术完成前，进行了术前阶段的模拟。手术顺利完成。在术后1、3和6个月的检查中，假体的位置和移动性均为令人满意，并且没有观察到任何并发症。与术前期相比，特殊骨科医院评分和梅约肘关节功能评分均有所提高。对于肘关节复杂肿瘤患者，三维打印技术可能有助于精确切除肿瘤，并提供比传统手术更精确有效的个体化肘关节假体。当结合术后早期科学康复训练时，可以获得满意的治疗效果，因此这是一种值得推广的方法。版权所有2023年作者。由Wolters Kluwer Health, Inc.出版。

With a high failure rate and multiple postoperative complications, the resection for tumors in the elbow and reconstruction present a formidable challenge to orthopedic surgeons. The maturation of 3-dimension (3D) printing technology has facilitated the preoperative design, intraoperative navigation, and reconstruction of bone defects in patients with complex malignant tumors of the elbow joint. In order to improve prognosis, we explored a method of tumor resection and elbow reconstruction aided by 3D printing technology in this research.The patient underwent nephrectomy for clear cell carcinoma of the left kidney 3 years ago. Six months ago, the patient presented with limited movement and lateral tenderness in the right elbow joint. The tumor puncture biopsy demonstrated renal clear cell carcinoma metastasis.Renal clear cell carcinoma with distal humerus bone metastasis.Thin-layer CT scan data of the patient was acquired, and a 3D reconstruction of both upper limb bones and joints was conducted, followed by a simulation of diseased tissue excision. According to the model, individualized osteotomy guidelines and elbow prostheses were designed and manufactured. Then, prior to the completion of the actual operation, a simulation of the preoperative phase was performed.The operation was completed without incident. At the 1-, 3-, and 6-month postoperative examinations, both the position and mobility of the prosthesis were found to be satisfactory, and no complications were observed. The hospital for special surgery score and mayo elbow performance score scores increased in comparison to the preoperative period.For patients with complex tumors in the elbow joint, 3D printing technology may assist in the precise excision of the tumor and provide an individualized elbow joint prosthesis that is more precise and effective than traditional surgery. It can accomplish a satisfactory treatment effect for patients when combined with early postoperative scientific rehabilitation training, so it is a method worth promoting.Copyright © 2023 the Author(s). Published by Wolters Kluwer Health, Inc.