直肠癌是指齿线至直——乙状结肠交界处之间的癌肿，是消化道最常见的恶性肿瘤之一。

Cancer refers to the teeth straight line-at the junction between the sigmoid colon cancer, digestive tract is one of the most common malignant tumor.

youdao

直肠癌是指齿线至直——乙状结肠交界处之间的癌肿，是消化道最常见的恶性肿瘤之一。

Cancer refers to the teeth straight line-at the junction between the sigmoid colon cancer, digestive tract is one of the most common malignant tumor.

youdao