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导管原位癌（ｄｕｃｔａｌ ｃａｒｃｉｎｏｍａ ｉｎ ｓｉｔｕ， ＤＣＩＳ）亦称导管内癌，作为一种非浸润性癌，其主要病变是乳腺导管上皮细胞的异常增生。此病发病率随着２０年来钼靶摄片的普及而大为增加。ＤＣＩＳ治疗的传统观点仍以根治术或改良根治术（简称乳房切除）为
Catheter carcinoma in situ (DCIS) is also called intraductal carcinoma. As a non-invasive carcinoma, the main lesion is the abnormal proliferation of ductal epithelial cells of the breast. The incidence of this disease has increased significantly with the popularity of mammography in 20 years. The traditional view of DCIS treatment is still radical or modified radical mastectomy (abbreviated as mastectomy)