bone cancer after breast cancer?

I belong to a breast cancer support group and several women have had bone pain (back, legs, hips) and have had bones scans and they've all come up with other reasons (bursitis, arthritis, etc.) There are two of us who have bone mets, but our pain was extraordinarily different than the others.

Bone mets is not likely to affect the knees. They typically start in the spine or pelvis and then go into the "long" bones (upper arm and femur in the leg). There's a good chance that there's other stuff going on with your sister and that she's going to be fine.

If she does have bone mets without any organ involvement, it's considered to be much more treatable with many options. If only a few bones are affected, radiation is a common treatment method. Hormone treatment is also commonly used.

By the way, if she does have bone mets, it's not called bone cancer. It's called breast cancer with metastasis to the bones.

EDIT: Hey, that's great news! I'm really happy for you all! :D

Sadly this is a fear that all of us who have been through cancer face.

It is possible that her cancer has spread to the bone, that is something breast cancer is known to do.

It is also possible she has some other bone degeneration as a side issue of the ongoing treatment. Most of these 5 year pills increase the risk of osteoporosis so there is that possibility.

Sadly my friend had breast cancer, had every procedure your sister had,
but tragically within a few years
the cancer reappeared in her bones and in her liver, and sadly she passed away soon after
she was 32 as well
You'll just have to hope for the best and support your sister whatever the outcome is