PSA readings after prostatectomy

[Guest guest]

I had a robotic prostatectomy in 2007, after two tumors were found in the gland,

Gleason score of 6. My follow-up PSA tests in 2008 and 2009 showed PSA of less

than 0.01 (in other words, undetectable). Now in January 2010, the report I just

received in the mail after my latest test says less than 0.03. Is that still

considered undetectable? My impression is that in dealing with such small

quantities, the difference between .01 and .03 isn't necessarily significant. Am

I right about that?

Thanks,