What is the main purpose of hormone receptor testing in breast cancer?

The main purpose of hormone receptor testing in breast cancer is to assess the hormone sensitivity of the cancer. This testing specifically looks for the presence of estrogen receptors (ER) and progesterone receptors (PR) on the cancer cells. The results of this testing are crucial because they help determine how likely the cancer is to respond to hormone therapy, which can be an effective treatment for hormone receptor-positive breast cancers.

When a tumor is identified as hormone receptor-positive, it indicates that the growth of the cancer is influenced by hormones such as estrogen and progesterone. These tumors can often be treated successfully with therapies that block these hormones or lower their levels in the body. Understanding the hormone receptor status allows healthcare providers to tailor treatment plans more effectively, enhancing the likelihood of positive outcomes for patients.

The other options, while relevant to overall patient management, do not encompass the specialized role of hormone receptor testing in breast cancer treatment. Recognizing that hormone receptor testing is specific to understanding cancer behavior and treatment response is essential for delivering optimal care in breast cancer management.