title: Causative factors of unsuccessful dacryocystorhinostomy and the surgical technique of revision external dacryocystorhinostomy.
authors.forename: Ved Prakash
authors.initials: VP
authors.lastname: Gupta
authors.forename: Pragati
authors.initials: P
authors.lastname: Gupta
authors.forename: Rigved
authors.initials: R
authors.lastname: Gupta
mesh_terms: D003608:Dacryocystorhinostomy; D004724:Endoscopy; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000601:surgery*; D012086:Reoperation / Q000379:methods*; D017211:Treatment Failure