[gchappel]

First question- how old?
They really can be almost anything, "patchy spots" are often aging changes in the right age groups.
We don't usually describe masses as patchy spots, so that is a plus.
Do you have an actual copy of the report- the actual medical description would be helpful, patch spots is not a radiographic description.
These are often nothing, but wish I could give you a better idea.
Good luck, definitely followup with the mri.
Gary