The radiation-induced hemorrhagic proctitis is a serious condition that can occur in any patient undergoing pelvic radiotherapy, sometimes being required hospitalization and transfusion therapy. The therapeutic approach is still very controversial. Both for the initial treatment and for refractory cases, one option is formalin application. This method is cheap, easily available, simple to perform, and effective in controlling bleeding. The authors report two cases of radiation-induced hemorrhagic proctitis treated with endoluminal instillation of formalin, and they discuss its therapeutic efficacy and complications.
