Impact of stereotactic body radiotherapy on colorectal cancer with distant metastases

Masayuki Hiraki, Junichi Nishimura, Masahisa Ohtsuka, Hiroya Shiomi, Mamoru Uemura, Naotsugu Haraguchi, Taishi Hata, Taro Hayashi, Ichiro Takemasa, Tsunekazu Mizushima, Fumiaki Isohashi, Yasuo Yoshioka, Kazuhiko Ogawa, Yuichiro Doki, Masaki Mori, Hirofumi Yamamoto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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 adenocarci nomas. 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 tech nique for resection in patients with distant metastasis from CRC who have small metastatic tumor volume.

Original languageEnglish
Pages (from-to)795-799
Number of pages5
JournalOncology reports
Issue number2
Publication statusPublished - Feb 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research


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