Phase II trial on SBRT for unresectable liver metastases: long-term outcome and prognostic factors of survival after 5 years of follow-up

Marta Scorsetti, Tiziana Comito, Elena Clerici, Ciro Franzese, Angelo Tozzi, Cristina Iftode, Lucia Di Brina, Pierina Navarria, Pietro Mancosu, Giacomo Reggiori, Antonella Fogliata, Stefano Tomatis, Guido Torzilli, Luca Cozzi

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: The aim of this study was to evaluate long-term efficacy and survival prognostic factors of stereotactic body radiation therapy (SBRT) for un-resectable liver metastases in patients enrolled in a prospective phase II trial.

METHODS AND MATERIALS: 5-year local control (LC), overall survival (OS), progression free survival (PFS) and toxicity rates were analyzed in patients with un-resectable liver metastases enrolled in a Phase II Trial on liver SBRT, with a prescription dose of 75Gy in 3 consecutive fractions.

RESULTS: A total of 61 patients with 76 lesions were enrolled, with a median follow-up time of 6.1 years. One, three and 5 year LC rates were 94 ± 3.1%, 78.0 ± 5.9% and 78.0 ± 5.9%, without reaching the median LC time. Median OS was 27.6 months and the survival rates were 85.2 ± 4.5%, 31.1 ± 5.9% and 18.0 ± 4.9% at 1, 3 and 5-year after SBRT, respectively. Univariate analysis showed that favorable primary site (colorectal, breast and gynecological) of metastases (p = 0.001) improved survival. Toxicity was moderate. One patient experienced G3 late chest wall pain, which resolved within 1 year from SBRT. No cases of Radiation Induced Liver Disease (RILD) were detected.

CONCLUSIONS: Long-term results of this Phase II study suggest the efficacy and safety of SBRT for un-resectable liver metastases after 5-year of follow up. Selection of cases with positive prognostic factors may improve long-term survival of these oligo-metastastic patients and may confirm the role of SBRT as an effective alternative local therapy for liver metastases.

Original languageEnglish
Pages (from-to)234
JournalRadiation Oncology
Volume13
Issue number1
DOIs
Publication statusPublished - Nov 26 2018

Keywords

  • Aged
  • Dose Fractionation, Radiation
  • Female
  • Follow-Up Studies
  • Humans
  • Liver Neoplasms/mortality
  • Male
  • Neoplasms/mortality
  • Prognosis
  • Prospective Studies
  • Radiosurgery/mortality
  • Survival Rate

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