Fistula

имя существительное [латинский язык, множественное число] fistulas, fistulae; [медицина] свищ, фистула Синоним(ы): sinus

Большой англо-русский словарь

Fistula

noun (plural -las or fistulae) Etymology: Middle English, from Latin, pipe, fistula an abnormal passage that leads from an abscess or hollow organ or part to the body surface or from one hollow organ or part to another and that may be surgically created to permit passage of fluids or secretions

Merriam-Webster's Collegiate Dictionary