The utilization of intraluminal formalin for intractable rectal haemorrhage in advanced rectal cancer: a case report.

A patient with a metastatic fixed low rectal carcinoma presented severe rectal bleeding requiring massive transfusion over with a 36-hour period. Bleeding was controlled with the instillation of a 4% intrarectal formalin solution permitting the completion of a course of neoadjuvant chemoradiotherapy. This technique has been reserved for intractable transfusion-dependent radiation proctitis and is presented as a primary alternative in severe rectal bleeding from inoperable rectal cancer.