title: Silicone intubation with intraoperative mitomycin C for nasolacrimal duct obstruction in adults: a prospective, randomized, double-masked study.
abstract: OBJECTIVE
  To assess the efficacy of intraoperative mitomycin C (MMC) during silicone intubation (SI) as a substitute for dacryocystorhinostomy (DCR) in nasolacrimal duct obstruction (NLDO).
  
  
  METHODS
  In this prospective, double-masked study, 88 patients with complete NLD obstruction who were candidates for DCR were randomized in 2 groups. All study patients underwent SI with application of MMC or placebo in a randomized, double-masked fashion, with the former receiving 0.2 mg/mL for 2 minutes before SI.
  
  
  RESULTS
  After a mean follow-up interval of 8 months, 25 of the 43 eyes in the MMC group and 21 of the 44 eyes in the placebo group had a successful outcome and were free of tearing and discharge. No significant difference was noted between the 2 groups (p = 0.331). In patients with simple epiphora and less than 6 months of duration, SI alone was effective in 83% of patients; however, in the same group, MMC application during SI did not show beneficial effect over SI alone. But in patients with simple epiphora of 6-months duration or longer, the application of MMC during SI resulted in better efficacy compared with SI alone. The success rates in the patients that had chronic dacryocystitis was lower (23%) compared with patients that had only epiphora (63.7%).
  
  
  CONCLUSIONS
  SI alone could effectively substitute for a more extensive procedure such as DCR in patients with simple epiphora, particularly those with newly developed symptoms. In cases with longer duration of symptoms of epiphora, application of MMC would increase the success rate significantly.
authors.affiliation: Tehran University Eye Research Center, Farabi Eye Hospital, Tehran, Iran.
authors.forename: Syed Ziaeddin
authors.initials: SZ
authors.lastname: Tabatabaie
authors.forename: Abtin
authors.initials: A
authors.lastname: Heirati
authors.forename: Mohammad Taher
authors.initials: MT
authors.lastname: Rajabi
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Kasaee
mesh_terms: D000328:Adult; D000477:Alkylating Agents / Q000008:administration & dosage*; D003131:Combined Modality Therapy; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007430:Intraoperative Care; D007440:Intubation / Q000379:methods*; D007767:Lacrimal Duct Obstruction / Q000628:therapy*; D008297:Male; D016685:Mitomycin / Q000008:administration & dosage*; D009301:Nasolacrimal Duct; D011446:Prospective Studies; D012826:Silicone Elastomers; D016896:Treatment Outcome
chemical_list: D000477:Alkylating Agents; D012826:Silicone Elastomers; D016685:Mitomycin