HR+/HER2- Breast Cancer is the most prevalent form of breast cancer. This type accounts for a higher percentage among all breast cancers. Hormone receptors are proteins that receive hormone signals and cue the cancer cells to grow. If breast cancer cells get signals from the hormone estrogen that could promote tumor growth, it is known as estrogen receptor-positive (ER+) breast cancer. If cancerous cells get signals from the hormone progesterone that could promote growth, it is known as progesterone receptor-positive (PR+) breast cancer. Breast cancer that is ER-positive or PR-positive falls under the category of hormone receptor-positive (HR+) breast cancer. In addit...
