Adebahr, S.* ; Althaus, A.* ; Scharl, S.* ; Strouthos, I.* ; Farolfi, A.* ; Serani, F.* ; Lanzafame, H.* ; Trapp, C.* ; Koerber, S.A.* ; Peeken, J.C. ; Vogel, M.M. ; Vrachimis, A.* ; Spohn, S.K.B.* ; Grosu, A.L.* ; Kroeze, S.G.C.* ; Guckenberger, M.* ; Fanti, S.* ; Hruby, G.* ; Emmett, L.* ; Belka, C.* ; Schmidt-Hegemann, N.S.* ; Henkenberens, C.* ; Aebersold, D.M.* ; Wiegel, T.* ; Afshar-Oromieh, A.* ; Zamboglou, C.* ; Shelan, M.*
     
 
    
        
The prognostic significance of a negative PSMA-PET scan prior to salvage radiotherapy following radical prostatectomy.
    
    
        
    
    
        
        Eur. J. Nucl. Med. Mol. Imaging 51, 558-567 (2024)
    
    
    
		
		
			
				Aim: The optimal management for early recurrent prostate cancer following radical prostatectomy (RP) in patients with negative prostate-specific membrane antigen positron-emission tomography (PSMA-PET) scan is an ongoing subject of debate. The aim of this study was to evaluate the outcome of salvage radiotherapy (SRT) in patients with biochemical recurrence with negative PSMA PET finding. Methods: This retrospective, multicenter (11 centers, 5 countries) analysis included patients who underwent SRT following biochemical recurrence (BR) of PC after RP without evidence of disease on PSMA-PET staging. Biochemical recurrence-free survival (bRFS), metastatic-free survival (MFS) and overall survival (OS) were assessed using Kaplan-Meier method. Multivariable Cox proportional hazards regression assessed predefined predictors of survival outcomes. Results: Three hundred patients were included, 253 (84.3%) received SRT to the prostate bed only, 46 (15.3%) additional elective pelvic nodal irradiation, respectively. Only 41 patients (13.7%) received concomitant androgen deprivation therapy (ADT). Median follow-up after SRT was 33 months (IQR: 20–46 months). Three-year bRFS, MFS, and OS following SRT were 73.9%, 87.8%, and 99.1%, respectively. Three-year bRFS was 77.5% and 48.3% for patients with PSA levels before PSMA-PET ≤ 0.5 ng/ml and > 0.5 ng/ml, respectively. Using univariate analysis, the International Society of Urological Pathology (ISUP) grade > 2 (p = 0.006), metastatic pelvic lymph nodes at surgery (p = 0.032), seminal vesicle involvement (p < 0.001), pre-SRT PSA level of > 0.5 ng/ml (p = 0.004), and lack of concomitant ADT (p = 0.023) were significantly associated with worse bRFS. On multivariate Cox proportional hazards, seminal vesicle infiltration (p = 0.007), ISUP score >2 (p = 0.048), and pre SRT PSA level > 0.5 ng/ml (p = 0.013) remained significantly associated with worse bRFS. Conclusion: Favorable bRFS after SRT in patients with BR and negative PSMA-PET following RP was achieved. These data support the usage of early SRT for patients with negative PSMA-PET findings.
			
			
				
			
		 
		
			
				
					
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
    
        Typ der Hochschulschrift
        
    
 
    
        Herausgeber
        
    
    
        Schlagwörter
        Pet Negative ; Prostate Cancer ; Psma-pet ; Salvage Radiotherapy; Adjuvant Radiotherapy; Radiation; Therapy; Men; Phase-3; Antigen; Cancer
    
 
    
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        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2024
    
 
    
        Prepublished im Jahr 
        2023
    
 
    
        HGF-Berichtsjahr
        2023
    
 
    
    
        ISSN (print) / ISBN
        1619-7070
    
 
    
        e-ISSN
        1432-105X
    
 
    
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	    Band: 51,  
	    Heft: 2,  
	    Seiten: 558-567 
	    Artikelnummer: ,  
	    Supplement: ,  
	
    
 
  
        
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            Verlag
            Springer
        
 
        
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            One New York Plaza, Suite 4600, New York, Ny, United States
        
 
	
        
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        Begutachtungsstatus
        Peer reviewed
    
 
     
    
        POF Topic(s)
        30203 - Molecular Targets and Therapies
    
 
    
        Forschungsfeld(er)
        Radiation Sciences
    
 
    
        PSP-Element(e)
        G-501300-001
    
 
    
        Förderungen
        University of Bern
    
 
    
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        Erfassungsdatum
        2023-10-18