目的探讨大肠癌患者外周血循环癌细胞端粒酶活性的变化与临床意义。
Objective To investigate telomerase activity in circulating tumor cells of patients with colorectal carcinoma.
这种类型的癌细胞在通过淋巴和血液循环的早期转移时分化严重。
The cancer cells in this type are badly differentiated with early metastasis through lymph and blood circulation.
一些变异的细胞快速生长，另一些则刺激附近的血管生长出新的毛细血管，其它的则使癌细胞进入血循环并生成新的肿瘤。
Some mutations spur rapid growth; others prod nearby blood vessels into sprouting new capillaries; still others send cancer cells out into the bloodstream, where they can seed new tumors.
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