Yegen Gülçin, Keskin Metin, Büyük Melek, Kunduz Enver, Balık Emre, Sağlam Esra Kaytan, Kapran Yersu, Asoğlu Oktar, Güllüoğlu Mine
Istanbul University Istanbul Faculty of Medicine, Department of Pathology, Istanbul, Turkey.
Istanbul University Istanbul Faculty of Medicine, Department of General Surgery, Istanbul, Turkey.
Ann Diagn Pathol. 2016 Feb;20:29-35. doi: 10.1016/j.anndiagpath.2015.10.008. Epub 2015 Oct 29.
The current therapeutic approach to patients with locally advanced rectal cancer is neoadjuvant radiotherapy or chemoradiotherapy followed by total mesorectal excision. We aimed to investigate the number, size, and distribution of metastatic and nonmetastatic lymph nodes within the mesorectum; whether neoadjuvant therapy has any impact on the number and size of the lymph nodes; and the impact of metastatic lymph node localization on overall and disease-free survival. Specimens from 50 consecutive patients with stage II/III rectal cancer receiving either neoadjuvant radiotherapy or chemoradiotherapy were investigated. Lymph node dissection was carried out by careful visual inspection and palpation. The localization of the each lymph node within the mesorectum and the relation with the tumor site were noted. The size and the number of lymph nodes retrieved decreased significantly with neoadjuvant therapy. Majority of the metastatic and nonmetastatic lymph nodes were located at or proximally to the tumor level and posterior side of the mesorectum. No relation was observed between the overall and disease-free survival, and the localization of the metastatic lymph nodes. Presence of lymph node metastases proximal to the tumor level has no impact on survival compared with the presence of lymph node metastasis only in the peritumoral region of the mesorectum. Although neoadjuvant therapy decreases the size and the number of lymph nodes, reaching an ideal number of lymph nodes for accurate staging is still possible with careful naked eye examination and dissection of perirectal fat. As the majority of metastatic and nonmetastatic lymph nodes are located in peritumoral and proximal compartment, and posterior side of the mesorectum, these regions should be the major interest of dissection.
目前对局部晚期直肠癌患者的治疗方法是新辅助放疗或放化疗,然后行全直肠系膜切除术。我们旨在研究直肠系膜内转移和非转移淋巴结的数量、大小及分布;新辅助治疗是否对淋巴结的数量和大小有任何影响;以及转移淋巴结定位对总生存期和无病生存期的影响。对50例连续接受新辅助放疗或放化疗的II/III期直肠癌患者的标本进行了研究。通过仔细的视觉检查和触诊进行淋巴结清扫。记录每个淋巴结在直肠系膜内的定位及其与肿瘤部位的关系。新辅助治疗后,所获取淋巴结的大小和数量显著减少。大多数转移和非转移淋巴结位于肿瘤水平或其近端以及直肠系膜的后侧。未观察到总生存期和无病生存期与转移淋巴结定位之间存在关联。与仅在直肠系膜肿瘤周围区域存在淋巴结转移相比,肿瘤水平近端存在淋巴结转移对生存无影响。尽管新辅助治疗会减少淋巴结的大小和数量,但通过仔细的肉眼检查和直肠周围脂肪的清扫,仍有可能获得用于准确分期的理想淋巴结数量。由于大多数转移和非转移淋巴结位于肿瘤周围和近端区域以及直肠系膜的后侧,这些区域应是清扫的主要关注点。