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3D‐printed model for resection of positive surgical margins in robot‐assisted prostatectomy
BJU International ( IF 3.7 ) Pub Date : 2024-11-27 , DOI: 10.1111/bju.16595
Christian Engesser, Brantner Philipp, Brigitta Gahl, Walter Matthias, Gehweiler Julian, Helge Seifert, Svetozar Subotic, Cyrill Rentsch, Christian Wetterauer, Lukas Bubendorf, Tatjana Vlajnic, Albolfazl Hosseini, Jan Ebbing

ObjectivesTo improve precision of secondary resection (SR) after positive surgical margin (PSM) detection by frozen section (FS) during nerve‐sparing (NS) robot‐assisted radical prostatectomy (RARP) by employing a personalised three‐dimensional (3D)‐printed prostate model derived from pelvic magnetic resonance imaging (MRI). This model was used to mark positive surgical margins (PSM) and guide intraoperative SR during NS‐RARP.Patients and MethodsProspective multicentre cohort study with 100 patients undergoing NS‐RARP between September 2018 and August 2021. Primary and secondary endpoints were the conversion rate of FS‐identified PSM to a tumour‐free margin and functional/oncological parameters within a 12‐month follow‐up, respectively.ResultsA PSM was identified in 23% of cases during FS, with a conversion to negative surgical margins (NSM) in 83% (19/23 cases) by model‐guided SR. The tumour detection rate in SR specimens was 39% (nine of 23 cases). Among the 19 patients with converted margins, 18 (95%) achieved undetectable prostate‐specific antigen levels 2 months postoperatively, with six (32%) having subsequent biochemical recurrence within 12 months. prostate‐specific‐membrane‐antigen positron emission tomography computed tomography found one local recurrence, and five cases of metastatic disease. In converted patients, the baseline median five‐item version of the International Index of Erectile Function score decreased by 16% after 1 year, with no significant difference compared to patients with primarily NSM. Limitations include the absence of a control group, the potential for false‐negative FS results and limited accuracy of MRI.ConclusionThe integration of 3D‐printed prostate models into NS‐RARP has the potential to positively impact surgical outcomes by improving the precision of SR and optimising pathosurgical communication.

中文翻译:


用于机器人辅助前列腺切除术中阳性手术切缘切除术的 3D 打印模型



目的采用源自盆腔磁共振成像 (MRI) 的个性化三维 (3D) 打印前列腺模型,在保留神经 (NS) 机器人辅助根治性前列腺切除术 (RARP) 期间通过冰冻切片 (FS) 检测阳性手术切缘 (PSM) 后提高二次切除 (SR) 的精度。该模型用于标记阳性手术切缘 (PSM) 并指导 NS-RARP 期间的术中 SR。患者和方法前瞻性多中心队列研究,2018 年 9 月至 2021 年 8 月期间对 100 名接受 NS-RARP 的患者进行研究。主要和次要终点分别是 FS 确定的 PSM 向无肿瘤切缘的转化率和功能/肿瘤学参数在 12 个月的随访中。结果在 FS 期间 23% 的病例中发现了 PSM,通过模型引导的 SR,83% (19/23) 的病例转化为阴性手术切缘 (NSM)。SR 标本中的肿瘤检出率为 39%(23 例中的 9 例)。在 19 例切缘转化患者中,18 例 (95%) 在术后 2 个月达到检测不到的前列腺特异性抗原水平,其中 6 例 (32%) 在 12 个月内随后出现生化复发。前列腺特异性膜抗原正电子发射断层扫描 计算机断层扫描发现 1 例局部复发和 5 例转移性疾病。在转换的患者中,国际勃起功能指数评分的基线中位五项版本在 1 年后下降了 16%,与主要患有 NSM 的患者相比没有显着差异。局限性包括没有对照组、FS 结果可能出现假阴性以及 MRI 的准确性有限。结论将 3D 打印前列腺模型整合到 NS-RARP 中有可能通过提高 SR 的精度和优化病理外科通信来对手术结果产生积极影响。
更新日期:2024-11-27
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