Safety of Stereotactic Body Radiation Therapy for Seven Ipsilateral Lung Lesions.

Our patient is a 48-year-old gentleman who initially was diagnosed with stage IV colorectal cancer on presentation. He had a history of multiple lines of systemic therapy, primary local resection, radioembolization treatments to the liver, along with liver metastasectomy with intraoperative radiofrequency ablation. He initially presented and completed single-isocenter stereotactic body radiation therapy (SBRT) to five right lung metastases with a treatment response and then completed SBRT to two additional right lower lung metastases. Since completion of his SBRT, he has remained disease free. Integration of SBRT to multiple ipsilateral lung lesions achieved a complete clinical response and assisted in keeping him disease free with the support of systemic therapy, and thus improved quality of life.