Metastasis directed treatment of brain metastases from colorectal cancer - a Danish population-based cohort study

Acta Oncol. 2020 Sep;59(9):1118-1122. doi: 10.1080/0284186X.2020.1769861. Epub 2020 May 22.

Abstract

Background: Brain metastases (BMs) are an uncommon presentation of metastatic colorectal cancer (mCRC) with reported incidence of about 2-4%. Today, there is an increased awareness towards a metastasis directed treatment approach with either surgical resection, stereotactic radiotherapy (SRT) or both. We examined patient characteristics and survival for patients treated with a localized modality for BM from CRC in a nationwide population-based study.Methods: A registry-based cohort study of all patients with a resected primary colorectal cancer and localized treatment of BM during 2000-2013. We computed descriptive statistics and analysed overall survival by the Kaplan-Meier method and Cox regression.Results: A total of 38131 patients had surgery for a primary CRC and 235 patients were recorded with a metastasis directed treatment for BM, comprising resection alone (n = 158), SRT alone (n = 51) and combined resection and SRT (n = 26). Rectal primary tumor (48.9% vs. 36.2%, p < .001) and lung metastasectomy (11.9 vs 2.8%, p < .001) were more frequent in the BM group. The median survival of patients receiving localized treatment for BM was 9.6 months (95% confidence interval (CI) 7.2-10.8). The 1- and 5-year overall survival were 41.7% (95% CI 35-48%) and 11.2% (95% CI 6.9-16.3%). In multivariate analysis, nodal stage was associated with increased mortality with a hazard ratio of 1.63 (95% CI 1.07-2.60, p = .03) for N2 stage with reference to N0.Conclusion: We report a median overall survival of 9.6 months for patients receiving localized treatment for BM from CRC. Lung metastases and rectal primary tumor are more common in the population treated for BM.

MeSH terms

  • Aged
  • Brain Neoplasms / mortality
  • Brain Neoplasms / secondary
  • Brain Neoplasms / therapy*
  • Colorectal Neoplasms / mortality
  • Colorectal Neoplasms / pathology
  • Colorectal Neoplasms / surgery*
  • Combined Modality Therapy / methods
  • Combined Modality Therapy / statistics & numerical data
  • Denmark / epidemiology
  • Female
  • Follow-Up Studies
  • Humans
  • Kaplan-Meier Estimate
  • Lung Neoplasms / mortality
  • Lung Neoplasms / secondary
  • Lung Neoplasms / surgery*
  • Male
  • Metastasectomy / statistics & numerical data*
  • Middle Aged
  • Neurosurgical Procedures / statistics & numerical data
  • Pneumonectomy / statistics & numerical data
  • Prognosis
  • Radiosurgery / statistics & numerical data*
  • Registries / statistics & numerical data
  • Survival Analysis
  • Treatment Outcome