Hormone (estrogen and/or progesterone) positive cancer cells are able to grow and multiply more rapidly when those hormones are present. They do so by attaching to what are called hormone receptors on the cancer cells. The objective of hormone therapy is to reduce the amount of those hormones in your body, thereby slowing the growth of cancer cells and preventing the mutation of healthy cells into cancer preventing the hormones from attaching to them. As such, hormone therapy alone does not cure existing cancer. It is generally used to slow existing cancer and/or prevent recurrence of hormone susceptible cancers.

A PET scan shows metabolic activity. High metabolic activity in unexpected areas are an indication of cancer growth.,

CA27.29 is a tumor marker found in the blood. In addition to breast cancer, they can be elevated from other conditions such as kidney or liver disease.

I would definitely discuss your concerns with your oncologist. Is your treatment plan designed to be curative or is it palliative?