Estrogen Receptor

Also written as ER.

Some of these carcinomas are found to be 'triple negative' for estrogen receptor, progesterone receptor, and HER2.

What our notes say

Some of these carcinomas are found to be 'triple negative' for estrogen receptor, progesterone receptor, and HER2. (Breast mcqs — Past Paper Questions & Answers)
Malignant cells are positive for HER2 but negative for estrogen receptor. (Breast mcqs — Past Paper Questions & Answers)
Example: *Tamoxifen* is an adjuvant therapy used after surgery in estrogen receptor-positive breast cancer. (Endocrine LAqs and SAqs)
Given the typical characteristics of male breast cancer, what hormone receptor status is most likely to be positive? → Estrogen Receptor (ER) and Progesterone Receptor (PR) positive (Disorders of the Vagina and Breast)
Choosing adequate therapeutic approach (e.g., HER2/NEU or estrogen receptor status in breast cancer) (Medical MCQs: Chemical Pathology & Haematology Exam Review)
Breast cancer (ER+): Tamoxifen (SERM – blocks estrogen receptor), Aromatase inhibitors (anastrozole, letrozole – block peripheral estrogen synthesis, used post-menopause) (Pharmacology CRASH Course)