l Low risk patients
l <4mm, no F/U
l 4-6 mm, F/U in 12  months,
stop if no change.
l 6-8mm, F/U in 6-12 months,
then up to 18-24 months if no
change.
l >8mm, CT F/U 3, 9, 24 months
or PET/enhanced CT/bx