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invasive front of colorectal cancer:Dynamic interface of pro-/anti-tumor factors

World Journal of Gastroenterology 2009年第47期15卷 5898-5906页

作者： Inti Zlobec Alessandro Lugli Institute for Pathology University Hospital BaselSchnbeinstrasse 40CH-4031 BaselSwitzerland

tumor-host interaction at the invasive front of colorectal cancer represents a critical interface encompassing a dynamic process of de-differentiation of colorectal carci-noma cells known as epithelial mesenchymal transition (EMT). EMT can be identified histologically by the presence of "tumor budding" ,a feature which can be highly specific for tumors showing an inf iltrating tumor growth pattern. Importantly,tumor budding and tumor border configuration have generated considerable interest as additional prognostic factors and are also recognized as such by the International Union Against Cancer. Evidence seems to suggest that the presence of tumor budding or an infiltrating growth pattern is inversely correlated with the presence of immune and inflammatory responses at the invasive tumor front. In fact,several tumor-associated antigens such as CD3,CD4,CD8,CD20,Granzyme B,FOXP3 and other immunological or inflammatory cell types have been identified as poten-tially prognostic in patients with this disease. Evidence seems to suggest that the balance between protumor (including budding and inf iltrating growth pattern) and anti-tumor (immune response or certain inflammatory cell types) factors at the invasive front of colorectal cancer may be decisive in determining tumor progression and the clinical outcome of patients with colorectal cancer. On one hand,the inf iltrating tumor border configuration and tumor budding promote progression and dissemination of tumor cells by penetrating the vascular and lymphatic vessels. On the other,the host attempts to fend off this attack by mounting an immune response to protect vascular and lymphatic channels from invasion by tumor buds. Whereas standard pathology reporting of breast and prostate cancer involves additional prognostic features,such as the BRE and Gleason scores,the ratio of pro-and anti-tumor factors could be a promising approach for the future development of a prognostic score for patients with colorectal cancer whi

关键词： Colorectal cancer Prognosis tumor invasive front tumor budding tumor growth pattern tumor infiltrating lymphocytes tumor immunity Microsatellite instability

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