title: Computed tomography of the lacrimal drainage system: retrospective study of 107 cases of dacryostenosis.
abstract: OBJECTIVE
  To evaluate the role of computed tomography in patients with dacryostenosis.
  
  
  METHODS
  One hundred seven cases of dacryostenosis (94 patients) were assessed by thorough clinical and lacrimal history and examination, and lacrimal region computerized tomography (CT). The lacrimal drainage system examination included the state and position of the puncta; Jones testing; lacrimal syringing; and, in the latter half of the study, telescopic nasal endoscopy. The patients were drawn from the hospital outpatients and private office of the operating lacrimal surgeon in this series (I.C.F.). Of the 107 cases, 79 either underwent dacryocystorhinostomy surgery or had this planned.
  
  
  RESULTS
  In 14 of the 107 cases (12 patients), preoperative CT led to an alteration of patient management, usually referral to an otolaryngologist for further evaluation or treatment. In addition to the detection of two tumors extrinsic to the sac, conditions such as ethmoiditis, lacrimal sac mucoceles, soft tissue opacity in the nasolacrimal duct, gross nasal polyposis, fungal sinusitis, and a dacryolith were observed by CT.
  
  
  CONCLUSIONS
  Similar to the role of functional endoscopic sinus surgery in otolaryngology, CT imaging will become increasingly important in the assessment of many patients with symptoms of lacrimal drainage obstruction.
authors.affiliation: Ocular Plastics Unit, Prince of Wales Hospital, Sydney, Australia.
authors.forename: I C
authors.initials: IC
authors.lastname: Francis
authors.forename: M B
authors.initials: MB
authors.lastname: Kappagoda
authors.forename: I E
authors.initials: IE
authors.lastname: Cole
authors.forename: L
authors.initials: L
authors.lastname: Bank
authors.forename: G D
authors.initials: GD
authors.lastname: Dunn
mesh_terms: D003608:Dacryocystorhinostomy; D005124:Eye Abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D007765:Lacrimal Apparatus / Q000002:abnormalities* / Q000000981:diagnostic imaging* / Q000601:surgery; D007767:Lacrimal Duct Obstruction / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed