In medicine, a fistula (pl. fistulas or fistulae) is an abnormal connection or passageway between two epithelium-lined organs or vessels that normally do not connect. It is generally a disease condition, but a fistula may be surgically created for therapeutic reasons.
OmegaWiki Dictionary
Ω
fistula Abnormal communication most commonly seen between two internal organs, or between an internal organ and the surface of the body.