Due to repeated outbreak and protracted course of disease, the risk of cancerization of colitis is increasing and 40% colitis cases with more than 25 years disease course produce cancerization.

由于结肠炎症反复发作，迁延不愈，癌变风险不断升高，25年以上病程癌变率高达40%。

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Due to repeated outbreak and protracted course of disease, the risk of cancerization of colitis is increasing and 40% colitis cases with more than 25 years disease course produce cancerization.

由于结肠炎症反复发作，迁延不愈，癌变风险不断升高，25年以上病程癌变率高达40%。

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