New UBO/FASI in adulthood

Has anyone ever had a new UBO appear on an MRI in adulthood? From what I understand, UBOs usually fade by late adolescence, and it’s uncommon for new ones to show up later on. I had an MRI that showed a new bright spot that wasn’t present on imaging from five years ago.

My NF specialist believes it’s most likely a UBO rather than a tumor, since it’s non-enhancing, but wants to do serial MRI’s for at least a year. Just had my six month scan and it is luckily still the same.

Curious if anyone else has had a similar finding, and how it turned out for you, if yours changed at all or stayed stable? Also how long did they continue to monitor it?