The causes of {{c1::fistula formation or persistence}} can be remembered by the acronym: {{c2::FRIENDS

The causes of {{c1::fistula formation or persistence}}&nbsp;can be remembered by the acronym:&nbsp;{{c2::FRIENDS<div><strong data-start="263" data-end="268"><br></strong></div><div><strong data-start="263" data-end="268">F</strong> = {{c1::Foreign body within or adjacent to the tract}}</div><div><strong data-start="328" data-end="333">R</strong> = {{c1::Radiation exposure of the site}}</div><div><strong data-start="379" data-end="384">I</strong> = {{c1::Inflammation (Crohn disease) or Infection at the site}}</div><div><strong data-start="453" data-end="458">E</strong> = {{c1::Epithelialization of the fistula tract}}</div><div><strong data-start="512" data-end="517">N</strong> = {{c1::Neoplasm}}</div><div><strong data-start="541" data-end="546">D</strong> = {{c1::Distal intestinal obstruction}}</div><div><strong data-start="591" data-end="596">S</strong> = {{c1::Steroids or other medications that impair wound healing}}}}</div>