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乳腺导管原位癌(ductal carcinomain situ,DCIS)在组织学上定义为癌细胞累及上皮全层,尚未突破基底膜而仅局限在导管内的恶性肿瘤[1]。自20世纪80年代以来,随着乳腺X射线检查技术不断进步,使临床不可触及的乳腺癌,尤其是DCIS检出率明显增加,
Ductal ductal carcinoma in situ (DCIS) is histologically defined as the cancer involving all layers of the epithelium, has not yet broken through the basement membrane and confined to malignant tumors in the duct [1]. Since the 1980s, with the continuous improvement of mammography technology, the detection rate of clinically unreachable breast cancer, especially DCIS, has been significantly increased,