The small bower represents a dose limiting structure for the administr
ation of tumoricidal abdominal and pelvic doses exceeding 4 500 cGy. I
f its real incidence remains controversial, predisposing factors and h
istopathologic features are currently well established. Contrary to th
e transient and self-limiting symptoms of acute radiation enteritis, c
hronic radiation enteropathy is a rare but severe sequelae indicing hi
gh morbidity and mortality rates. Its prevention constitutes, in multi
disciplinary institutions, a permanent challenge both for the radiothe
rapist and the pelvic surgeon.