So, what level actually defines undetectable? I've seen a variety of answers.
What's the story?
I've asked my Surgeon / Urologist this same question several times and the answer he consistently gives me is that he and the hospital - Northwestern Memorial Hospital in Chicago - do not report beyond 0.0 - and that they consider that level "undetectable." Remember that different laboratories may report different testing results for the same sample and that what you may read from one person posting test results and sensitivity levels can be an 'apples to oranges' comparison with your situation. I still wonder though . . .
Age: 59 (58 at diagnosis - June, 2008)
April '08 PSA 4.8 ("free PSA" 7.9), up from 3.5 year prior
June '08 had biopsy, 2 days later told results positive but in less than 1% of sample
Developed sepsis 2 days post-biopsy, seriously ill in hospital for 3 days
Dr. recommended robotic removal using da Vinci
Northwestern Memorial Hospital, Chicago, IL
Dr. Robert Nadler, Urologist/Surgeon
Post-op Gleason's: 3+3, Tertiary 4
Bladder & Urethral: Free
Seminal vesicles: Not involved
Lymphatic/Vascular Invasion: Not involved
Tumor: T2c; Location: Bilateral; Volume: 20%
Catheter: Removed 12-days after surgery
Incontinent: Yes (1/2 light pads per day)
Combination of Cialis and MUSE (alprostadil) three times weekly started 9-27-08
Returned to work 9-29-08 (18-19 days post-op)
PSA test result, post-op, 10/08: 0.0; 12/08: 0.0; 4/09: 0.0