I had a double mastectomy originally so with MBC, I get CT scans of the chest, abdomen and pelvis at first every 3 months and now every 6 months. I'm almost 3 years out. I only had a bone scan in the beginning to look for metastasic (different than a DEXA scan for osteoporosis). I was told I would only have more bones scans if symptomatic. I have complained of knee and shin pain in recent months and was told it's the AI causing it. How does he know? We may have to revisit that issue. They do an initial brain MRI, but only do followup brain MRIs if there are symptoms to suggest an issue. I had an initial PET scan, but no followups. I am currently taking Kisqali and Letrozole. Blessings, Zebra