fistulectomy

noun
fis·​tu·​lec·​to·​my | \ ˌfis(h)-chə-ˈlek-tə-mē, British also ˌfist-yu̇- How to pronounce fistulectomy (audio) \
plural fistulectomies

Medical Definition of fistulectomy

: surgical excision of a fistula