title: Ultrasonographic pictures of intravitreal triamcinolone acetonide.
abstract: OBJECTIVE
  To evaluate ultrasonographic pictures of intravitreal triamcinolone acetonide (IVTA).
  
  
  METHODS
  Twenty-eight eyes from 28 patients who needed intravitreal injection of triamcinolone acetonide (4 mg/0.1 mL) were included in this study. A baseline ocular B-scan ultrasound examination was performed in all eyes before IVTA injection. Subsequent examinations were scheduled about 1 hour, 1 day, and 1 week after the injection and thereafter weekly up to complete sonographic disappearance of triamcinolone acetonide. Ultrasonographic pictures of IVTA and disappearance time of the medication were evaluated.
  
  
  RESULTS
  In all the eyes, IVTA was seen as multiple inhomogeneous markedly hyperechoic areas with various size and shape and nonuniform distribution through the vitreous cavity. Common pictures included localized bright hyper-reflective area, diffuse bright point-like echo sources, membranous surfaces, and subhyaloid opacities. IVTA deposited along acoustic interfaces and changed their ultrasonographic characteristics. IVTA facilitated visualization of posterior vitreous surface in seven patients. Opacities due to IVTA gradually cleared over a 3- to 7-week period.
  
  
  CONCLUSIONS
  The findings indicate that IVTA has a bright hyper-reflective ultrasonic image and should be considered as a differential diagnosis for vitreous opacity. IVTA can change the ultrasonographic pattern of the vitreous cavity and highlight membranous surfaces.
authors.affiliation: Department of Ophthalmology, Poostchi Ophthalmic Research Center, Shiraz University of Medical Sciences, Shiraz - Iran. hosseinih@sums.ac.ir
authors.forename: Hamid
authors.initials: H
authors.lastname: Hosseini
authors.forename: Hamid
authors.initials: H
authors.lastname: Anvari-Ardakani
authors.forename: Mohammad
authors.initials: M
authors.lastname: Karanjam
authors.forename: Mohsen
authors.initials: M
authors.lastname: Farvardin
authors.forename: Sarah
authors.initials: S
authors.lastname: Nowroozizadeh
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005938:Glucocorticoids / Q000008:administration & dosage / Q000493:pharmacokinetics*; D006801:Humans; D007267:Injections; D008297:Male; D008875:Middle Aged; D012164:Retinal Diseases / Q000000981:diagnostic imaging* / Q000378:metabolism*; D014222:Triamcinolone Acetonide / Q000008:administration & dosage / Q000493:pharmacokinetics*; D014463:Ultrasonography; D014822:Vitreous Body / Q000000981:diagnostic imaging* / Q000378:metabolism*
chemical_list: D005938:Glucocorticoids; D014222:Triamcinolone Acetonide