内镜纳米炭标记技术辅助直肠癌新辅助放化疗后原位切除46例临床分析  

Endoscopic Carbon Nanoparticles Labeling Technique Assisted in situ Resection After Neoadjuvant Chemoradiotherapy for Rectal Cancer:Clinical Analysis of 46 Cases

作　　者：王源钊 张文昊 杨劲 吴伟航 方永超 赵虎 林楠 王蓉 王瑜 Wang Yuanzhao;Zhang Wenhao;Yang Jin(Department of General Surgery,Dongfang Hospital Affiliated to Xiamen University,No.900 Hospital of Joint Logistics Support Force,Fuzhou 350025,China)

机构地区：[1]厦门大学附属东方医院联勤保障部队第九〇〇医院普通外科,福州350025 [2]厦门大学附属东方医院联勤保障部队第九〇〇医院消化内科,福州350025

出　　处：《中国微创外科杂志》2023年第12期891-897,共7页Chinese Journal of Minimally Invasive Surgery

基　　金：福建省科技计划引导性项目(2021Y0061);全军后勤科研面上项目(CLB21J016)。

摘　　要：目的探讨内镜纳米炭标记技术在中低位局部进展期直肠癌(locally advanced rectal cancer,LARC)新辅助放化疗(neoadjuvant chemoradiotherapy,nCRT)后原位切除术中的价值。方法2020年1月~2023年1月,选择46例中低位LARC,于nCRT前内镜下应用纳米炭标记肿瘤下缘,nCRT后行腹腔镜直肠前切除术。观察术中纳米炭标记的显露情况,手术标本中各区域(原发肿瘤区域、肿瘤退缩瘢痕、远端切缘以及肿瘤下缘退缩区)长度,远端切缘阳性率。结果46例注射纳米炭至手术中位间隔时间105(77~182)d。nCRT后复查肠镜时均可在直肠黏膜面观察到纳米炭残迹。腹腔镜直肠前切除术中,41例(89.1%)可观察到直肠固有筋膜表面纳米炭标记显露,其中38例判定为显露且标记效果良好(纳米炭标记区宽度≤1.5 cm,可辅助术者精准判断远端手术切缘),3例判定为显露但标记效果欠佳(纳米炭黑染范围较大,但仍可实现肿瘤原位切除)。5例未观察到纳米炭标记,判定为显露失败。术中冰冻病理显示远端切缘均为阴性。测量可辨认原发肿瘤区域的30例离体标本:切除肠管长度17.9(10.1~25.7)cm;原发肿瘤区域长径(4.3±0.8)cm;肿瘤退缩瘢痕直径2.5(0.8~4.8)cm;肿瘤下缘退缩长度1.0(0~2.9)cm;17例中位直肠癌远端切缘长度3.4(1.5~4.3)cm,13例低位直肠癌远端切缘长度1.6(0.5~2.8)cm。结论直肠癌nCRT前应用内镜纳米炭标记技术,可以长期标记原发肿瘤下缘,辅助术者精准切除原发肿瘤区域。Objective To investigate the value of endoscopic carbon nanoparticles labeling technique assisted in situ resection after neoadjuvant chemoradiotherapy(nCRT)for middle and low locally advanced rectal cancer(LARC).Methods From January 2020 to January 2023,46 cases of middle or low LARC were selected for endoscopic injection of carbon nanoparticles suspension to label the lower edge of the tumor before nCRT,and laparoscopic anterior resection of the rectum was performed after nCRT.The main observations were the visualization of carbon nanoparticles marker during the operation,the length of each area(primary tumor area,tumor regression scar,distal resection margin,and regression area of lower edge of tumor)of surgical specimens and the positive rate of distal resection margins.Results The median interval between injection of carbon nanoparticles suspension and surgery was 105(77-182)d in the 46 cases.Carbon nanoparticles remnants were observed on the rectal mucosal surface in all the patients after nCRT by endoscopy.During laparoscopic anterior rectal resection surgeries,carbon nanoparticles marker exposure on the surface of the rectal intrinsic fascia observed in 41 cases(89.1%),of which 38 cases were judged as good exposure(the width of marker area≤1.5 cm,which assisted the operator accurately determining the distal surgical margins)and 3 cases were judged as inferior exposure(a larger range of black staining whereas in situ resection of the tumor still achievable).In another 5 cases,the carbon nanoparticles marker could not be observed and were judged as exposure failure.Intraoperative cryopathology showed that all distal resection margins were negative.Measurement of 30 surgical specimens with identifiable primary tumor area showed that the length of resected intestinal canal was 17.9(10.1-25.7)cm,the diameter of primary tumor area was(4.3±0.8)cm,the diameter of scar after tumor regression was 2.5(0.8-4.8)cm,and the length of regression of tumor lower margin was 1.0(0-2.9)cm.The length of distal resection mar

关 键 词：直肠癌 新辅助放化疗 肿瘤标记 纳米炭混悬注射液 原位切除 

分 类 号：R735.37[医药卫生—肿瘤]