Cyberknife Stereotactic Body Radiation Therapy for Nonresectable Tumors of the Liver: Preliminary Results

Figure 2

Tumor response in a patient with nonresectable and large ICC treated with Stereotactic Body Radiation Therapy (SBRT). (a) CT scan of the liver showed tumor compromising the liver outflow (right, middle, and left hepatic veins) with a satellite lesion in segment 3. (b)and (C) CT scans of the ICC before and after fiducial markers placement. (d) Tumor response by Ct scan and PET scan before (e) and at 3 months after SBRT (f). Note a “hot” liver mass before SBRT and same liver mass “cold” after treatment. It was found that the precise definition of the mass contour was difficult to establish. Although the gross total volume of the mass and its diameter appears to be similar when sizes were compared before and after treatment, its active tumor load has decreased.