title: Nasolacrimal duct obstruction and dacryocystocele associated with a concha bullosa mucocele.
abstract: OBJECTIVE
  To describe the rare occurrence of a concha bullosa mucocele producing secondary nasolacrimal duct obstruction and dacryocystocele.
  
  
  METHODS
  Case report.
  
  
  METHODS
  Forty-two-year-old man with 6-month history of left medial canthal mass.
  
  
  METHODS
  Clinical evaluation with lacrimal testing, computed tomography and surgical exploration, including biopsy, dacryocystorhinostomy, and excision/marsupialization of the middle turbinate concha bullosa mucocele were performed.
  
  
  RESULTS
  The medial canthal mass was confirmed to be a dacryocystocele associated with nasolacrimal duct obstruction and bone destruction caused by concha bullosa mucocele.
  
  
  CONCLUSIONS
  Concha bullosa mucoceles are uncommon and even more rarely can produce secondary nasolacrimal duct obstruction and dacryocystocele formation. The clinical and radiologic features may mimic a lacrimal sac malignancy.
authors.affiliation: Division of Orbital and Ophthalmic Plastic Surgery, Lions Eye Institute, and Department of Ophthalmology, Albany Medical College, Albany, New York 12208, USA.
authors.forename: B J
authors.initials: BJ
authors.lastname: Edison
authors.forename: D R
authors.initials: DR
authors.lastname: Meyer
mesh_terms: D000328:Adult; D003607:Dacryocystitis / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D003608:Dacryocystorhinostomy; D006801:Humans; D007767:Lacrimal Duct Obstruction / Q000000981:diagnostic imaging / Q000209:etiology*; D008297:Male; D009078:Mucocele / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D009301:Nasolacrimal Duct / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D010254:Paranasal Sinus Diseases / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014420:Turbinates / Q000000981:diagnostic imaging / Q000473:pathology*