Fig. 1

Endovascular coil-embolization of the superior rectal artery (SRA). Angiography of the inferior mesenteric artery A) displays normal anatomy, with opacification of the SRA and its terminal branches; also note the presence of coils in the inferior mesenteric vein (∆) from a previous venous embolization. Distal catheterization and opacification of the left branch of the SRA on B) allows better anatomic detail of the left terminal branches (arrow), selectively embolized with microcoils (open arrow) on C). Final control angiography after embolization of the left and right terminal branches of the SRA D) shows bilateral microcoils (open arrows) with upstream contrast stasis and absence of blood flow in the hemorrhoidal territory [projected at the level of the pubic symphysis (<) on image B)].