Stereotactic body radiotherapy for oligo-recurrence within the nodal area from colorectal cancer

Figure 1 CyberKnife planning of stereotactic body radiotherapy for paraaortic lymph node metastases from colorectal cancer. A: Axial view 1; B: Sagittal view; C: Coronal view; D: 3D view. Gross tumor volume (red arrow) was defined as the visualized lymph node. The radiation dose, 48 Gy in 3 fractions, was prescribed to the 80% isodose line of the maximum dose in order to cover the planning target volume.

Figure 2 Disease progression free survival in patients with oligo-recurrence within nodal area from colorectal cancer treated with streotactic body radiotherapy or surgical resection. The cohort of Kang and Bae’s studies are mostly composed of nodal metastases but additionally include lung and liver metastases. The cohort of surgical series include not only oligo-recurrence within nodal area but also central recurrence at anastomosis site. Dot size was weighted for number of patients in each cohort. SBRT: Streotactic body radiotherapy.