Mortimer said:

Truer words were never spoken. Excellent advice if you want to fly. Of course,
if you want to retire, blab all.

Well, in my case, the three letters that caused the problem were in a
record disclosed by my MD for other reasons (for the BP readings they
contained). I didn't even know the reference was in my MD's notes.
It's unfortunate, however, that the system encourages pilots to be less
than forthcoming. The medical exams should serve some purpose.
Because of the seemingly arbitrary nature of some of the decisions
based on the medical, though, the process seems to discourage candor to
the AME, and that's not helpful to aviation safety.

Wiz