Pamiss:
I concur that this is most likely a CYA situation.
I can't remember the exact phraseology, but I remember being greatly worried about a sentence or two on my scan report. My family doctor looked at it and laughed. He knew the doctor and knew for a fact that this was CYA phraseology. My doctor said that if they were really concerned they would have phrased it as "xxxxx". I can't remember the exact phrasing, but yours is definitely in the CYA.
Oh, I'd better do a CYA for myself. The above is merely an opinion from a non-medico!
Mel