Restaging pacientů s biochemickým relapsem po léčbě karcinomu prostaty pomocí PET/CT s 18F-fluorocholinem -- naše první zkušenosti.

Aim: To evaluate preliminary experience with 18F-fluorocholine PET/CT (FCh PET/CT) restaging imaging in prostate cancer patients with biochemical failure and stress the problems with prostate cancer recurrence detection in patients with low prostate specific antigen (PSA) levels. Methods: FCh PET/CT was performed for prostate cancer recurrence detection in 24 patients during 16 months. Of them, 14 patients with known clinical outcome were further retrospectively evaluated. We evaluated FCh PET/CT diagnostic performance in relation to PSA levels and PSA kinetics, Gleason score and initial staging. Results: Median of their PSA levels was 1.76 ng/ml, range: 0.44--2.88. Prostate cancer recurrence was detected in only 6 patients out of 14 using FCh PET/CT, sensitivity reached 43%. FCh PET/CT positive patients had clearly shorter PSA doubling time (median 4.15 versus 10.2 in FCh PET/CT negative ones) and slightly higher Gleason score. Conclusions: Although we achieved low FCh PET/CT sensitivity in patients with biochemical failure with low PSA levels, our data suggest that FCh PET/CT could be useful in those with still low PSA levels, but short PSA doubling time. PSA doubling time seems to be helpful in selecting (still) low level PSA patients for FCh PET/CT. [ABSTRACT FROM AUTHOR]