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Different patterns of lymphatic spread of sigmoid, rectosigmoid, and rectal cancers.

机译:乙状结肠,直肠乙状结肠和直肠癌的淋巴扩散方式不同。

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PURPOSE: We tried to evaluate the clinicopathological characteristics of rectosigmoid cancer compared with those of sigmoid and rectal cancer. METHODS: We collected data on patients who underwent curative resections for sigmoid (399; SC group), rectosigmoid (175; RS group), and upper rectal cancer (453; RA group) between June 1996 and December 2007. RESULTS: The mean distance from the anal verge was 12.5 cm for rectosigmoid cancer, 13 cm for sigmoid cancer, and 9.8 cm for rectal cancer. The most common metastatic lymph nodes were pararectal nodes for the RS and RA groups and sigmoid mesenteric lymph nodes for the SC group. In a comparison of categories N2 and N1 for SC and RA groups, the increase of the metastasis rate was similar for all lymph nodes groups. However, for the RS group, the increase of metastasis to pararectal nodes was prominent in the N2 category. Overall recurrence and disease-free survival rate were not different among the groups. For stage III disease, the local recurrence rate was significantly higher in the RA group; the disease-free survival rate was higher in the SC group, and the RS group showed results similar to those of the RA group. CONCLUSION: Clinicopathological characteristics of rectosigmoid cancer were similar to those of sigmoid or rectal cancer. For lymphatic spreads, it was different from sigmoid or rectal cancer and more frequently metastasized to pararectal nodes. Oncologic results were slightly unfavorable to sigmoid colon, and showed data similar to those of rectal cancer. Therefore, rectosigmoid cancer was a "real" classification of colorectal cancer with unique lymphatic spread.
机译:目的:我们试图评估与乙状结肠和直肠癌相比,乙状结肠癌的临床病理特征。方法:我们收集了1996年6月至2007年12月期间接受乙状结肠切除术(399; SC组),直肠乙状结肠切除术(175; RS组)和上直肠癌(453; RA组)的患者的数据。结果:平均距离对于肛门乙状结肠癌,距肛门边缘的距离为12.5厘米,对于乙状结肠癌为13厘米,对于直肠癌为9.8厘米。 RS和RA组最常见的转移性淋巴结是直肠旁淋巴结,SC组最常见的是乙状结肠肠系膜淋巴结。比较SC和RA组的N2和N1类,所有淋巴结组的转移率增加相似。但是,对于RS组,转移到直肠旁结点的转移在N2类中很明显。各组的总体复发率和无病生存率无差异。对于III期疾病,RA组的局部复发率明显更高; SC组无病生存率较高,RS组的结果与RA组相似。结论:直肠乙状结肠癌的临床病理特征与乙状结肠或直肠癌相似。就淋巴扩散而言,它不同于乙状结肠癌或直肠癌,更常转移至直肠旁淋巴结。肿瘤学结果对乙状结肠不利,显示的数据与直肠癌相似。因此,直肠乙状结肠癌是具有独特淋巴扩散的大肠癌的“真正”分类。

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