BACKGROUND:Surgery is usually recommended to treat retroperitoneal tumors. However, complete surgical resections often remain challenging. OBJECTIVE:To assess the assistant role of three-dimensional (3D) imaging and printing model in retroperitoneal tumor resection, as well as compare the difference between 3D printing and computed tomography (CT) in preoperative planning and confidence building. METHODS:We admitted a patient with retroperitoneal mass (13.0×6.4×14.8 cm) adjacent to important abdominal blood vessels whose surgery was thought to be difficult. 3D printing and CT was arranged. A novel questionnaire and scoring system consisting of surgery difficulty and safety were designed to compare doctors understanding and confidence for surgery based on 3D printing and CT. Twenty-four doctors completed the scoring table based on CT and then 3D imaging, respectively. Paired t-test was applied for statistics analysis. RESULTS:Preoperative evaluation based on 3D printing indicated that the tumor could be removed completely. The operation lasted 120 minutes to successfully remove the tumor and the estimated blood loss was less than 100 ml. Scores based on 3D printing is significantly higher than CT in difficulty and safety of surgery (p < 0.001). Interestingly, the junior doctors seem to benefit more from 3D printing than the senior doctors. CONCLUSIONS:3D imaging and printing model provides greater help for preoperative planning and confidence building than using CT in resection of retroperitoneal tumor, especially for the junior doctors.

中文翻译：

---

三维打印 - 辅助计划完整和安全切除腹膜后肿瘤。

背景：通常建议手术治疗腹膜后肿瘤。然而，完整的手术切除通常仍然具有挑战性。目的：评估三维（3D）成像和打印模型在腹膜后肿瘤切除术中的辅助作用，比较3D打印和计算机断层扫描（CT）在术前计划和建立信心方面的差异。方法：我们收治了一名腹膜后肿块（13.0×6.4×14.8 cm）的患者，该肿块毗邻重要的腹部血管，手术被认为是困难的。安排了3D打印和CT。基于3D打印和CT，设计了一种由手术难度和安全性组成的新型问卷和评分系统，以比较医生对手术的理解和信心。24名医生分别根据CT和3D影像完成评分表。配对 t 检验用于统计分析。结果：基于3D打印的术前评估表明肿瘤可以完全切除。手术历时120分钟，成功切除肿瘤，估计失血量不到100毫升。基于 3D 打印的手术难度和安全性评分明显高于 CT（p < 0.001）。有趣的是，初级医生似乎比高级医生从 3D 打印中受益更多。结论:3D成像和打印模型比CT在腹膜后肿瘤切除术中为术前计划和建立信心提供了更大的帮助，尤其是对初级医生而言。基于 3D 打印的术前评估表明肿瘤可以完全切除。手术历时120分钟，成功切除肿瘤，估计失血量不到100毫升。基于 3D 打印的手术难度和安全性评分明显高于 CT（p < 0.001）。有趣的是，初级医生似乎比高级医生从 3D 打印中受益更多。结论:3D成像和打印模型比CT在腹膜后肿瘤切除术中为术前计划和建立信心提供了更大的帮助，尤其是对初级医生而言。基于 3D 打印的术前评估表明肿瘤可以完全切除。手术历时120分钟，成功切除肿瘤，估计失血量不到100毫升。基于 3D 打印的手术难度和安全性评分明显高于 CT（p < 0.001）。有趣的是，初级医生似乎比高级医生从 3D 打印中受益更多。结论:3D成像和打印模型比CT在腹膜后肿瘤切除术中为术前计划和建立信心提供了更大的帮助，尤其是对初级医生而言。基于 3D 打印的手术难度和安全性评分明显高于 CT（p < 0.001）。有趣的是，初级医生似乎比高级医生从 3D 打印中受益更多。结论:3D成像和打印模型比CT在腹膜后肿瘤切除术中为术前计划和建立信心提供了更大的帮助，尤其是对初级医生而言。基于 3D 打印的手术难度和安全性评分明显高于 CT（p < 0.001）。有趣的是，初级医生似乎比高级医生从 3D 打印中受益更多。结论:3D成像和打印模型比CT在腹膜后肿瘤切除术中为术前计划和建立信心提供了更大的帮助，尤其是对初级医生而言。