Good news: the report on last week's MRI of the thoracic spine does NOT indicate new metastases. Instead everything which appears seems to have been treated already. No risk of spinal cord compression or fractures.
Bone scans show only bone activity. If I'd broken a bone as a child, it would still show up on a bone scan. Likewise old, treated mets show up on bone scans as well as new mets.
It's possible that the MRI did not cover the same places as the bone scan, although I am sure the thoracic spine is the thoracic spine. I did not see the bone scan report but the MRI report is very thorough.
Dr. G cleared me to dance (a little). We discussed a new treatment; more on that later while I do some research.