Abstract
This study was undertaken to determine respective associations between prostatic citrate or metabolic atrophy (no detectable citrate, choline, and creatine) at magnetic resonance spectroscopy (MRS) and time on hormone-deprivation therapy, serum PSA, and biopsy Gleason score. Clinical data, histopathology reports and PSA levels of 36 patients on hormone-deprivation therapy (age, 64±9 years, pre-therapeutic biopsy Gleason sum, median 6, range 3–8, antiandrogens only, n=3, LHRH-analogues only, n=4, combined hormone-deprivation therapy, n=29, duration, 27±19 weeks) for locally confined prostate cancer (PCA) were retrospectively correlated with findings in the peripheral zone of the prostate at 3D-MRS (endorectal coil, PRESS, TR 1,000 ms, TE 130 ms). The results show that citrate was usually detected after 13 weeks or less of hormone-deprivation therapy (10/12 vs. 6/24 patients, chi-square-test, p=0.002). All patients with PSA levels exceeding 0.20 ng/ml had detectable metabolites (citrate, n=12, choline without citrate, n=6), while 9/18 patients with PSA 0.20 ng/ml or less showed metabolic atrophy (Fisher-exact-test, p=0.001). There were no significant associations between citrate, metabolic atrophy, pre-therapeutic PSA, and biopsy Gleason sum, respectively. It has been concluded that hormone-deprivation therapy for locally confined PCA has not reached its full deprivation potential after 13 weeks. MRS detects prostate metabolism in patients with PSA exceeding 0.20 ng/ml after hormone-deprivation therapy.
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This study was supported in part by grants NIH R01-59897 and NIH R29-64667 and the Association for the Cure of Cancer of the Prostate Foundation.
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Mueller-Lisse, U.G., Swanson, M.G., Vigneron, D.B. et al. Magnetic resonance spectroscopy in patients with locally confined prostate cancer: association of prostatic citrate and metabolic atrophy with time on hormone deprivation therapy, PSA level, and biopsy Gleason score. Eur Radiol 17, 371–378 (2007). https://doi.org/10.1007/s00330-006-0321-3
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DOI: https://doi.org/10.1007/s00330-006-0321-3