Breast Fibroadenosis, also known as fibroadenosis of breast, is related to papillary carcinoma and papilloma. An important gene associated with Breast Fibroadenosis is ERBB2 (Erb-B2 Receptor Tyrosine Kinase 2), and among its related pathways/superpathways are Signaling by Receptor Tyrosine Kinases and Cell cycle Regulation of G1/S transition (part 1). Affiliated tissues include breast, and related phenotypes are neoplasm and limbs/digits/tail