Abstract:
BACKGROUND:A substantial number of patients will develop further biochemical progression after radical prostatectomy (RP) and salvage radiotherapy (sRT). Recently published data using prostate-specific membrane antigen ligand positron emission tomography (PSMA - PET) for re-staging suggest that those recurrences are often located outside the prostate fossa and most of the patients have a limited number of metastases, making them amenable to metastasis-directed treatment (MDT). METHODS:We analyzed 78 patients with biochemical progression after RP and sRT from a retrospective European multicenter database and assessed the biochemical recurrence-free survival (bRFS; PSA < nadir + 0.2 ng/ml or no PSA decline) as well as the androgen deprivation therapy- free survival (ADT-FS) using Kaplan-Meier curves. Log-rank test and multivariate analysis was performed to determine influencing factors. RESULTS:A total of 185 PSMA - PET positive metastases were detected and all lesions were treated with radiotherapy (RT). Concurrent ADT was prescribed in 16.7% (13/78) of patients. The median PSA level before RT was 1.90 ng/mL (range, 0.1-22.1) and decreased statistically significantly to a median PSA nadir level of 0.26 ng/mL (range, 0.0-12.25; p < 0.001). The median PSA level of 0.88 ng/mL (range, 0.0-25.8) at the last follow-up was also statistically significantly lower (p = 0.008) than the median PSA level of 1.9 ng/mL (range, 0.1-22.1) before RT. The median bRFS was 17.0 months (95% CI, 14.2-19.8). After 12 months, 55.3% of patients were free of biochemical progression. Multivariate analyses showed that concurrent ADT was the most important independent factor for bRFS (p = 0.01). The median ADT-FS was not reached and exploratory statistical analyses estimated a median ADT-FS of 34.0 months (95% CI, 16.3-51.7). Multivariate analyses revealed no significant parameters for ADT-FS. CONCLUSIONS:RT as MDT based on PSMA - PET of all metastases of recurrent prostate cancer after RP and sRT represents a viable treatment option for well-informed and well-selected patients.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Oehus AK,Kroeze SGC,Schmidt-Hegemann NS,Vogel MME,Kirste S,Becker J,Burger IA,Derlin T,Bartenstein P,Eiber M,Mix M,la Fougère C,Belka C,Combs SE,Grosu AL,Müller AC,Guckenberger M,Christiansen H,Henkenberens Cdoi
10.1186/s12885-020-06883-5subject
Has Abstractpub_date
2020-04-29 00:00:00pages
362issue
1issn
1471-2407pii
10.1186/s12885-020-06883-5journal_volume
20pub_type
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