Effect of Endovascular Inferior Mesenteric Artery Embolization on Colonic Perfusion Prior to Rectal Surgery for Rectal Tumor or Sigmoid Colon Surgery

Effect of Endovascular Inferior Mesenteric Artery Embolization on Colonic Perfusion Prior to Rectal Surgery for Rectal Tumor or Sigmoid Colon Surgery - A Single-center Feasibility Pilot Study.

The investigators hypothesize that a primary embolization, 3-4 weeks before surgery, would allow development of vascular collaterality, in particular for the marginal artery which will ensure a better colonic perfusion.

Inclusion Criteria:

• The patient must have given their free and informed consent and signed the consent form
• The patient must be a member or beneficiary of a health insurance plan
• The patient is at least 18 years old and less than 80 years old
• Patient has rectal cancer or sigmoid colon cancer requiring surgical treatment

Exclusion Criteria:

• The subject is participating in another study, or is in a period of exclusion determined by a previous study
• The subject refuses to sign the consent
• It is impossible to give the subject informed information
• The patient is under safeguard of justice or state guardianship
• Patient has a history of abdominal surgery
• Patient suffers from a hemostasis disorder (hemophilia, von Willebrand disease, thrombocytopenia) and is on anticoagulant therapy.
• Patient whose general condition appears too precarious or is taking corticosteroids or immunosuppressants leading to an unacceptable surgical risk.
• Renal insufficiency with clearance <45ml / min
• Known allergy to contrast media
• Patient who had treatment of the abdominal aorta or its branches Reported pregnancy (the existence of effective contraception will be verified for women of childbearing age).
• Anatomical variant at risk or absence of marginal artery highlighted at the time of arteriography.
• Abnormality of the superior mesenteric artery
• Historic occlusion of the inferior mesenteric artery