primary carcinomas , including lobular carcinomas , and recurrences or metastases are characterized by similar frequencies of response to the estradiol receptor test ( 68 % positive , 26 % negative and 6 % borderline ) , while normal breast tissue is characterized by a higher frequency of negative results ( 3 % positive , 71 % negative and 26 % borderline ) .
C0206692
lobular carcinomas
C0006141
breast