For elderly patients with locally advanced rectal cancer who are not candidates for surgery or chemotherapy, what would be an appropriate palliative regimen?  

There is an old paper from Princess Margaret Hospital ~1980, called "Is the Miles operation really necessary for the treatment of rectal cancer?". (Editor note: 1993 Update). These are patients who were medically inoperable or refused surgery. I believe doses were about 40 Gy. Remember that this ...