The co-existence of ductal and lobular carcinoma in situ in the breast, without evidence of stromal invasion. The disease is MONDO_0006184 (ductal breast carcinoma in situ and lobular carcinoma in situ). Also known as: DCIS and LCIS of breast, DCIS and LCIS of the breast, ductal and lobular breast carcinoma in situ, ductal and lobular carcinoma in situ of breast, ductal and lobular carcinoma in situ of the breast, ductal carcinoma in situ with lobular carcinoma in situ of breast, ductal carcinoma in situ with lobular carcinoma in situ of the breast, intraductal and lobular breast carcinoma in situ.