Estrogen-Receptor Positive Breast Cancer is related to breast cancer and endometrial hyperplasia. An important gene associated with Estrogen-Receptor Positive Breast Cancer is HSPB8 (Heat Shock Protein Family B (Small) Member 8), and among its related pathways/superpathways are Gene expression (Transcription) and Infectious disease. The drugs Palbociclib and Docetaxel have been mentioned in the context of this disorder. Affiliated tissues include breast and bone, and related phenotypes are Decreased viability and Increased cell viability after pRB stimulation