In some rectal cancers, 5 days of radiation as good as 5 weeks

Patients undergoing preoperative radiation for locally advanced rectal cancer and their clinicians now have a choice about the length of that treatment. In a phase 3 trial, the effectiveness of an experimental short-course of radiation (5 days) was similar to that of long-course radiation (28 days), which is currently the standard of care. And the short course was less toxic. Both schedules were combined with chemotherapy in the trial, known as Polish-II.

Medscape