FIstulaEWS

fistula \Fis"tu*la\ (?; 135), n.; pl. Fistul[ae]. [L]  (Med.) A permanent abnormal opening into the soft parts with a constant discharge; a deep, narrow, chronic abscess; an abnormal opening between an internal cavity and another cavity or the surface; as, a salivary fistula; an anal fistula; a recto-vaginal fistula.