With the evolution of radiotherapy techniques permitting reduction in fraction number from 37 to 40, down to 20 and now, for selected patients, to five fractions, the inevitable question is can we, and should we, test less than five fractions? Ongoing work is addressing this issue. Trials of five or fewer fractions of radiotherapy are reported in Table 2.76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87

Although data is still sparse and emerging, these trials suggest the feasibility of even