Figure 4.

The mean ΔV% of different groups of outcomes. The mean ΔV% from the initial volume after CyberKnife stereotactic radiosurgery separated by tumors that ultimately regressed (solid line, n = 27) to <85% of the initial volume; stable (dashed line, n = 5) within ±15% of the initial volume; and those that progressed (dotted line, n = 2) to >115% of the initial volume. Tumor volume changes became significantly different at 4 months, with continued divergence until the 36th month of follow-up.