目前医学界不能确定管内原位癌最佳的治疗方式，但可以肯定的是有一些可能永远都不会成为威胁生命的癌细胞。
Doctors are uncertain about the best way to treat them and accept some would never become life-threatening cancers.
目前医学界不能确定管内原位癌最佳的治疗方式，但可以肯定的是有一些可能永远都不会成为威胁生命的癌细胞。
Doctors are uncertain about the best way to treat them and accept some would never become life-threatening cancers.
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