短语词组短语ductal hyperplasia 导管增生ductal epithelioma 导管上皮瘤ductal preservation 导管保护Ductal invasion 细胞则主要呈侵入胆管ductal sign 导管征ductal injection 乳导管ductal occluder 磨菇伞器ductal obstruction 导管阻塞Ductal carcinoma 导管癌;管腺癌 返回 ductal