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目的:研究直肠癌系膜淋巴结(LN)大小、分布、转移及微转移规律. 方法:对全直肠系膜切除的直肠癌标本用LN显示液处理, 切取的LN以常规病理结合免疫组化染色检测. 结果:本组31例548枚LN,27例(87.1%)153枚(27.9%) LN发现转移.其中,直径小于0.5 cm LN 366枚(66.8%), 转移91枚(59.5%).转移病例中,后壁直肠癌15例,78 枚LN转移,75枚沿直肠上动脉分布.侧壁直肠癌12例, 75枚LN转移,同侧直肠上动脉分支、直肠中动脉旁转移37和8枚,对侧分别为9和0枚. 结论:直肠癌大部分转移LN直径小于0.5 cm,主要分布于直肠上动脉旁.LN转移与肿瘤方位有关,后壁癌可同时沿肿瘤两侧系膜扩散,侧壁癌以同侧LN受累为主.
Objective: To study the size, distribution, metastasis and micrometastasis of mesangial lymph nodes (LN) in rectal cancer.Methods: The total mesorectal excision specimens of rectal cancer were treated with LN fluid, and the LNs were excised by routine pathological and immunohistochemical methods Results: A total of 548 LN cases were found in 31 cases, of which 27 cases (87.1%) 153 (27.9%) LN were found to be metastatic, of which 366 (66.8%) were smaller than 0.5 cm in LN and 91 (59.5% Fifteen cases of posterior wall rectal cancer, 78 LN metastases, and 75 posterior superior colorectal cancers were distributed in the study. Twelve cases of side wall rectal cancer, 75 LN metastases, ipsilateral superior rectal artery branches, And the contralateral were 9 and 0. Conclusion: The majority of LN metastasis of rectal cancer less than 0.5 cm in diameter, mainly in the rectal artery.LN metastasis and tumor orientation, posterior wall cancer along the tumor along both sides of the mesangium Diffusion, side wall cancer with ipsilateral LN involvement.