(medicine) An abnormal connection or passageway between organs or vessels that normally do not connect. / (rare) A tube, a pipe, or a hole.

plural of fistula

plural of fistula

an abnormal connection between an artery and a vein

A fistula between the bladder and vagina.

(medicine) A chronic abnormal communication between the epithelialised surface of the anal canal and (usually) the perianal skin.

plural of anal fistula

plural of anal fistula

plural of arteriovenous fistula

Anal fistula.