3mm nodule on right upper lung no change mri 2008/2011. can this just be an age thing you know how some things grow on you as you get older. ?

No, but: It's probably an old scar from and old infection. I would probably recheck in a year, but if you're otherwise feeling well and have no new issues, no change in 3 years is a good thing.

PPD/quantiferon gold: Would suggest getting a PPD and/or a quantiferon gold blood test checking for any possible exposure to TB as this can cause small nodules.

3 mm nodule: Nodules stable for 3 yrs are almost certainly benign, especially 3 mm nodules. Most people will have some nodules in their lung. I question whether these were truly seen on MRI as this is a poor test to image the lungs (which are always moving). Are you sure it wasn't a ct? I would recommend no further testing if this is truly stable for three years. Even PPD is overkill unless you have symptoms.