Breast Disease, also known as breast diseases, is related to microglandular adenosis and hypertrophy of breast, and has symptoms including exanthema, mastodynia and pelvic pain. An important gene associated with Breast Disease is PRLR (Prolactin Receptor), and among its related pathways/superpathways are ERK Signaling and GPCR Pathway. The drugs Acetylcholine and Tamoxifen have been mentioned in the context of this disorder. Affiliated tissues include breast and lymph node, and related phenotypes are homeostasis/metabolism and growth/size/body region