title: Where is it coming from?
abstract: A case report is presented of an unusual situation where standard routine diagnostic methods failed to reveal the true origin of an endodontic infection.
mesh_terms: D003751:Dental Fistula / Q000209:etiology* / Q000601:surgery; D019232:Dental Restoration Failure; D006801:Humans; D007180:Incisor; D008297:Male; D008875:Middle Aged; D010484:Periapical Granuloma / Q000150:complications*; D019233:Retreatment; D012184:Retrograde Obturation