Clinical Correlates of Benefit From Radium-223 Therapy in Metastatic Castration Resistant Prostate Cancer

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

BACKGROUND: We sought to identify potential clinical variables associated with outcomes after radium-223 therapy in routine practice. METHODS: Consecutive non-trial mCRPC patients who received ≥1 dose of radium dichloride-223 at four academic and one community urology-specific cancer centers from May 2013 to June 2014 were retrospectively identified. Association of baseline and on-therapy clinical variables with number of radium doses received and clinical outcomes including overall survival were analyzed using chi-square statistics, cox proportional hazards, and Kaplan–Meier methods. Bone Scan Index (BSI) was derived from available bone scans using EXINI software. RESULTS: One hundred and forty-five patients were included. Radium-223 was administered for six cycles in 74 patients (51%). One-year survival in this heavily pre-treated population was 64% (95%CI: 54–73%). In univariate and multivariate analysis, survival was highly associated with receiving all six doses of Radium-223. Receipt of six doses was associated with ECOG PS of 0–1, lower baseline PSA & pain level, no prior abiraterone/enzalutamide, <5 BSI value, and normal alkaline phosphatase. In patients who reported baseline pain (n = 72), pain declined in 51% after one dose and increased in 7%. PSA declined ≥50% in 16% (18/110). Alkaline phosphatase declined ≥25% in 48% (33/69) and ≥50% in 16/69 patients. BSI declined in 17 (68%) of the 25 patients who had bone scan available at treatment follow-up. Grade ≥3 neutropenia, anemia, and thrombocytopenia occurred in 4% (n = 114), 4% (n = 125), and 5% (n = 123), respectively. CONCLUSIONS: Patients earlier in their disease course with <5 BSI, low pain score, and good ECOG performance status are optimal candidates for radium-223. Radium-223 therapy is well tolerated with most patients reporting declines in pain scores and BSI. Prostate 77:479–488, 2017.

Detaljer

Författare
  • Ajjai Alva
  • Luke Nordquist
  • Stephanie Daignault
  • Saby George
  • Jorge Ramos
  • Costantine Albany
  • Sudhir Isharwal
  • Matthew McDonald
  • Gregory Campbell
  • Pongwut Danchaivijitr
  • Sarah Yentz
  • Aseem Anand
  • Evan Y. Yu
Enheter & grupper
Externa organisationer
  • University of Michigan
  • Roswell Park Cancer Institute
  • Fred Hutchinson Cancer Research Center
  • Urology Cancer Center, Omaha
  • Indiana University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Cancer och onkologi
  • Urologi och njurmedicin

Nyckelord

Originalspråkengelska
Sidor (från-till)479-488
Antal sidor10
TidskriftProstate
Volym77
Utgåva nummer5
StatusPublished - 2017 apr 1
PublikationskategoriForskning
Peer review utfördJa