The complexity of cryptoglandular fistula-in-ano can be predicted by the distance of the external opening to the anal verge; implications for preoperative imaging?
L A M LeendersJasper StijnsYu-Ting van LoonF Van TilborgDaria K WasowiczDavid D E ZimmermanPublished in: Techniques in coloproctology (2020)
The complexity of perianal fistula depends on the DEAOV. We propose that preoperative imaging should be performed in fistulas with external opening > 1 cm from the anal verge.