Impact of stereotactic body radiotherapy on colorectal cancer with distant metastases

Oncol Rep. 2014 Feb;31(2):795-9. doi: 10.3892/or.2013.2871. Epub 2013 Nov 27.


Stereotactic radiotherapy is a minimally invasive technique for delivering highly focused ionizing radiation with extreme precision. This technique was initially developed in neurosurgical practice and applied to extracranial lesions in the 1990s, and was termed stereotactic body radiotherapy (SBRT). Studies have reported that the resection of distant metastases from colorectal cancer (CRC) contributes to relatively long-term survival. However, the resection of pulmonary and liver metastases is not possible for various reasons. SBRT offers a therapeutic alternative to unresectable metastatic lesions. The present study describes three cases of distant metastasis from CRC that exhibited a complete response (CR) to SBRT. Case 1 is a 70-year-old man with recurrent liver metastases after surgery for rectal cancer with liver metastasis (S3: diameter 1.8 cm and volume 3.0 ml; S6: diameter 1.3 cm and volume 1.2 ml). Cases 2 and 3 were 65-year-old and 70-year-old men, respectively. Both patients had pulmonary metastasis after surgery for rectal and cecum cancer (Case 2: diameter 1.2 cm and volume 0.9 ml; Case 3: diameter 0.8 cm and volume 0.27 ml). All cases were moderately differentiated adenocarcinomas. No serious adverse side-effects were observed during the therapy. CR was obtained in all patients on the basis of computed tomography 15-33 months after radiotherapy. Our experience supports that SBRT is a safe and alternative technique for resection in patients with distant metastasis from CRC who have small metastatic tumor volume.

Publication types

  • Case Reports

MeSH terms

  • Adenocarcinoma / drug therapy
  • Adenocarcinoma / radiotherapy*
  • Adenocarcinoma / secondary
  • Aged
  • Angiogenesis Inhibitors / therapeutic use
  • Antibodies, Monoclonal, Humanized / therapeutic use
  • Antineoplastic Combined Chemotherapy Protocols / therapeutic use
  • Bevacizumab
  • Camptothecin / analogs & derivatives
  • Camptothecin / therapeutic use
  • Colorectal Neoplasms / drug therapy
  • Colorectal Neoplasms / radiotherapy*
  • Colorectal Neoplasms / surgery
  • Fluorouracil / therapeutic use
  • Humans
  • Leucovorin / therapeutic use
  • Liver Neoplasms / drug therapy
  • Liver Neoplasms / radiotherapy*
  • Liver Neoplasms / secondary
  • Liver Neoplasms / surgery
  • Lung Neoplasms / drug therapy
  • Lung Neoplasms / radiotherapy*
  • Lung Neoplasms / secondary
  • Male
  • Organoplatinum Compounds / therapeutic use
  • Radiosurgery / methods*
  • Treatment Outcome


  • Angiogenesis Inhibitors
  • Antibodies, Monoclonal, Humanized
  • Organoplatinum Compounds
  • Bevacizumab
  • Leucovorin
  • Fluorouracil
  • Camptothecin

Supplementary concepts

  • Folfox protocol
  • IFL protocol