Vogel, M.M. ; Kroeze, S.G.C.* ; Henkenberens, C.* ; Schmidt-Hegemann, N.S.* ; Kirste, S.* ; Becker, J.* ; Burger, I.A.* ; Derlin, T.* ; Bartenstein, P.* ; Mix, M.* ; la Fougère, C.* ; Eiber, M.* ; Christiansen, H.* ; Belka, C.* ; Grosu, A.-L.* ; Müller, A.C.* ; Guckenberger, M.* ; Combs, S.E.
     
 
    
        
Prognostic risk classification for biochemical relapse-free survival in patients with oligorecurrent prostate cancer after [68Ga]PSMA-PET-guided metastasis-directed therapy.
    
    
        
    
    
        
        Eur. J. Nucl. Med. Mol. Imaging 47, 2328-2338 (2020)
    
    
    
		
		
			
				Purpose: Since the success of prostate-specific membrane antigen-positron emission tomography (PSMA-PET) imaging for patients with oligorecurrent prostate cancer (ORPC), it is increasingly used for radiotherapy as metastasis-directed therapy (MDT). Therefore, we developed a prognostic risk classification for biochemical relapse-free survival (bRFS) for patients after PSMA-PET-guided MDT after radical prostatectomy. Methods: We analyzed 292 patients with local recurrence (LR) and/or pelvic lymph node (LN) lesions and/or up to five distant LN, bone (BM), or visceral metastases (VM) detected with [68Ga]PSMA-PET imaging. Median follow-up was 16 months (range 0–57). The primary endpoint was bRFS after MDT. Cox regression analysis for risk factors was incorporated into a recursive partitioning analysis (RPA) with classification and regression tree method. Results: PSA at recurrence ≥ 0.8 ng/mL, BM, and VM was significantly associated with biochemical relapse. RPA showed five groups with tenfold cross-validation of 0.294 (SE 0.032). After building risk classes I to IV (p < 0.0001), mean bRFS was 36.3 months (95% CI 32.4–40.1) in class I (PSA < 0.8 ng/mL, no BM) and 25.8 months (95% CI 22.5–29.1) in class II (PSA ≥ 0.8 ng/mL, no BM, no VM). LR and/or pelvic LNs caused relapse in classes I and II. Mean bRFS was 16.0 months (95% CI 12.4–19.6) in class III (PSA irrelevant, present BM) and 5.7 months (95% CI 2.7–8.7) in class IV (PSA ≥ 0.8 ng/mL, no BM, present VM). Conclusion: We developed and internally validated a risk classification for bRFS after PSMA-PET-guided MDT. Patients with PSA < 0.8 ng/mL and local relapse only (LR and/or pelvic LNs) had the most promising bRFS. PSA ≥ 0.8 ng/mL and local relapse only (LR and/or pelvic LNs) indicated intermediate risk for failure. Patients with BM were at higher risk regardless of the PSA. However, those patients still show satisfactory bRFS. In patients with VM, bRFS is heavily decreased. MDT in such cases should be discussed individually.
			
			
				
			
		 
		
			
				
					
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
    
        Typ der Hochschulschrift
        
    
 
    
        Herausgeber
        
    
    
        Schlagwörter
        Mdt ; Oligometastatic ; Oligorecurrent ; Prostate-specific Membrane Antigen-positron Emission Tomography ; Prostatic Carcinoma; Pet/ct-based Radiotherapy; Radical Prostatectomy; Ga-68-psma Pet/ct; Salvage Radiotherapy; Radiation Treatment; Recurrence; Psa; Impact
    
 
    
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        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2020
    
 
    
        Prepublished im Jahr 
        
    
 
    
        HGF-Berichtsjahr
        2020
    
 
    
    
        ISSN (print) / ISBN
        1619-7070
    
 
    
        e-ISSN
        1432-105X
    
 
    
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	    Band: 47,  
	    Heft: 10,  
	    Seiten: 2328-2338 
	    Artikelnummer: ,  
	    Supplement: ,  
	
    
 
  
        
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            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
    
 
    
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        Erfassungsdatum
        2020-04-06