Assertion: perianal fistula | /r/HasProperty | tunnel
Facets:
Source sentences:
text: Perianal fistula also commonly called fistula-in-ano, is an abnormal hollow tract or tunnel that is lined with granulation tissue that connects a primary opening inside the anal canal to a secondary opening in the perianal skin; secondary tracts may be multiple and can extend from the same primary opening and have significant negative impact on their quality of life .