BAX and invasive ductal breast carcinoma: Bax is expressed in the epithelium of the normal breast and its expression is highest during postlactational mammary gland involution; furthermore, Bax expression is significantly reduced or absent in invasive ductal breast carcinomas (Krajewski et al, 1994; Bargou et al, 1995; Li et al, 1996; Feuerhake et al, 2000; Shilkaitis et al, 2000).