title: Intravitreal triamcinolone acetonide for cystoid macular edema in nonischemic central retinal vein occlusion.
abstract: OBJECTIVE
  The effectiveness of intravitreal triamcinolone acetonide in the treatment of cystoid macular edema from central retinal vein occlusion (CRVO) was investigated.
  
  
  METHODS
  A noncomparative, prospective, interventional case series.
  
  
  METHODS
  In a clinical practice, 18 patients were enrolled with nonischemic CRVO and cystoid macular edema. Two milligrams of triamcinolone acetonide were injected into the vitreous of only one eye from each patient. The outcome measures were 1-mm mean central retinal thickness on optical coherence tomography and visual acuity.
  
  
  RESULTS
  Mean duration of symptoms before surgery was 2 months (SD, 1.3 months). Ten patients required repeated injections for recurrent cystoid macular edema (mean, 1.8 injections). Mean visual acuity significantly improved from 20/300 to 20/166 (P = .007) at 1 month, 20/100 (P = .0005) at 2 months, 20/130 (P = .007) at 3 months, and 20/150 (P = .02) at 6 months but deteriorated again to 20/270 (not significant) at 12 months. There was a significant improvement in retinal thickness from presentation 518 microm, to 363 microm (P = .03) at 1 month, 304 microm (P = .04) at 2 months, and 353 microm (P = .01) at 3 months but not from presentation at 6 months (mean, 383 microm) and 12 months (mean, 406 microm). Eleven patients suffered intraocular pressure rises requiring intervention. Intravitreal triamcinolone acetonide did not prevent collateral circulation formation, which was seen in 10 patients.
  
  
  CONCLUSIONS
  Intravitreal corticosteroid injection is very effective in reversing cystoid macular edema and improving visual acuity in recent-onset nonischemic CRVO in the first 6 months, but this is unfortunately not sustained at 1 year.
authors.affiliation: Department of Ophthalmology, St Thomas' Hospital, Lambeth Palace Road, London SE1 7EH, United Kingdom. tom@retinasurgery.co.uk
authors.forename: Tom H
authors.initials: TH
authors.lastname: Williamson
authors.forename: Annie
authors.initials: A
authors.lastname: O'Donnell
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005451:Fluorescein Angiography; D005938:Glucocorticoids / Q000627:therapeutic use*; D006801:Humans; D007267:Injections; D007429:Intraocular Pressure; D008269:Macular Edema / Q000175:diagnosis / Q000188:drug therapy* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012008:Recurrence; D012160:Retina / Q000473:pathology; D012170:Retinal Vein Occlusion / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy*; D041623:Tomography, Optical Coherence; D016896:Treatment Outcome; D014222:Triamcinolone Acetonide / Q000627:therapeutic use*; D014792:Visual Acuity; D014822:Vitreous Body
chemical_list: D005938:Glucocorticoids; D014222:Triamcinolone Acetonide