the peroxidase-antiperoxidase histochemical method of staining for tissue carcinoembryonic antigen ( cea ) was performed on 20 samples of malignant breast tissue , 20 samples of fibroadenomatous breast tissue , and 15 samples of breast tissue that variably contained minimal fibrosis ( n = 7 ) , ductal ectasia ( n = 5 ) , and sclerosing adenosis ( n = 3 ; the fibrocystic changes of the breast ) .
C0016059
fibrosis
C0016034
the fibrocystic changes of