title: Branch retinal vein occlusion associated with vitreoretinal traction.
abstract: METHODS
  Branch retinal vein occlusion (BRVO) is believed to arise at arteriovenous crossing sites. Surgical dissection of the arteriovenous sheath has been proposed as a treatment option, yet induction of a posterior vitreous detachment may be as important in obtaining a successful surgical outcome, suggesting that vitreoretinal traction may play a role in the development of BRVO. A retrospective review of 3 patients presenting with clinical features of BRVO and evidence of vitreoretinal traction at the occlusion site was conducted.
  
  
  CONCLUSIONS
  All patients presented with mild vitreous hemorrhage. Intraretinal hemorrhages were distributed in an unusual linear pattern along the involved venous segment, suggesting the presence of vitreoretinal traction. Fluorescein angiography demonstrated blocked fluorescence secondary to hemorrhage with delay of venous flow at the avulsion site. Partial avulsion of the involved venous segment was evident on clinical examination, B-scan ultrasound, or optical coherence tomography. Vitreoretinal traction may contribute to the pathogenesis of BRVO in some patients.
authors.affiliation: The National Retina Institute, Chevy Chase, MD 20815, USA. mjohnson@bmgnri.com
authors.forename: T Mark
authors.initials: TM
authors.lastname: Johnson
authors.forename: Christopher W
authors.initials: CW
authors.lastname: Vaughn
authors.forename: Bert M
authors.initials: BM
authors.lastname: Glaser
mesh_terms: D005128:Eye Diseases / Q000150:complications* / Q000000981:diagnostic imaging; D005451:Fluorescein Angiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D012163:Retinal Detachment / Q000175:diagnosis / Q000209:etiology; D012164:Retinal Diseases / Q000150:complications* / Q000000981:diagnostic imaging; D012170:Retinal Vein Occlusion / Q000175:diagnosis / Q000209:etiology*; D012189:Retrospective Studies; D000267:Tissue Adhesions; D041623:Tomography, Optical Coherence; D014463:Ultrasonography; D014822:Vitreous Body / Q000000981:diagnostic imaging / Q000473:pathology*; D020255:Vitreous Detachment / Q000175:diagnosis / Q000209:etiology