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Case report describes ischemic proctitis from rectal arteriovenous fistula requiring multiple interventionsWhen rectal bleeding won't stop, could a hidden blood vessel connection be the cause?

AI-generated summary of the cited source, checked by automated accuracy review. How we work

Key Takeaway
Consider rectal arteriovenous fistula in challenging ischemic proctitis cases; evidence is from a single report.

A case report and literature review describes a 61-year-old man diagnosed with ischemic proctitis caused by a superior rectal arteriovenous fistula. The diagnostic process was reported as challenging, with angiography ultimately confirming the presence of the fistula. No comparator group was reported, and the study phase, setting, and follow-up duration were not specified.

The patient's treatment course involved endoscopic hemostasis and interventional embolization. Due to subsequent rectal stenosis, the patient eventually underwent proctectomy. The report does not provide specific primary or secondary outcomes, effect sizes, or absolute numbers for these interventions. Safety and tolerability data, including adverse events and discontinuations, were not reported.

Key limitations include the nature of the evidence as a single case report, the absence of comparative data or statistical analysis, and the noted diagnostic challenges. Funding sources and conflicts of interest were not reported. The practice relevance of these findings is constrained by the low level of evidence. This report serves to document a rare presentation and complex management pathway for a condition with limited published data.

Imagine having rectal bleeding that just won't stop, and doctors struggle to find the cause. That's what happened to a 61-year-old man. The problem turned out to be a rare, abnormal connection between an artery and a vein near his rectum — a condition called a superior rectal arteriovenous fistula. This connection can cause a type of rectal inflammation called ischemic proctitis.

Doctors used a special imaging test called angiography to finally see the hidden blood vessel problem. They first tried to stop the bleeding with a scope and then blocked the abnormal vessels with a procedure called embolization. But the man's rectum developed significant scarring and narrowing, a condition called rectal stenosis.

Because of this scarring, he eventually needed a proctectomy — surgical removal of his rectum. The report notes that diagnosing this condition was quite challenging, which means other people might face similar diagnostic delays. This is just one person's story, so we don't know how common this is or what the best treatment path might be for others. It serves as a detailed record of a complex medical journey, not a guide for treatment.

What this means for you:
A rare blood vessel connection caused severe rectal issues, showing how hard this condition can be to diagnose and treat.

Study Details

Study typeSystematic review
EvidenceLevel 1
PublishedMar 2026
View Original Abstract ↓
Ischemic proctitis is a rare but severe condition characterized by ischemic injury to the rectum due to insufficient blood supply from the vessels feeding the rectum. Due to the rectum’s rich collateral circulation, ischemic proctitis is uncommon. We present a case of a 61-year-old man with ischemic proctitis presenting primarily with rectal bleeding. Angiography confirmed the presence of a superior rectal arteriovenous fistula. The diagnostic process was quite challenging. The patient underwent endoscopic hemostasis and interventional embolization, and eventually underwent proctectomy due to rectal stenosis. A literature review on ischemic proctitis is also included.
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