title: En-face optical coherence tomography angiography of neovascularization elsewhere in hemicentral retinal vein occlusion.
abstract: OBJECTIVE
  To evaluate how the growth of neovascularization elsewhere (NVE) was delineated in an eye with hemicentral retinal vein occlusion (CRVO) using optical coherence tomography (OCT) angiography.
  
  
  METHODS
  We examined a 64-year-old man diagnosed with hemi-CRVO. The area around the occluded vein was scanned using a spectral-domain OCT device (RTVue XR Avanti). Blood flow was detected using the split-spectrum amplitude-decorrelation angiography (SSADA) algorithm. Color fundus photography, fluorescein angiography (FA), and OCT angiography examinations were performed at the first visit and at 3 and 6 months postpresentation.
  
  
  RESULTS
  At the first visit, FA revealed delayed retinal venous filling and extensive areas of capillary nonperfusion. The patient underwent a trial of intravitreal ranibizumab injection (0.5 mg/0.05 mL) for the treatment of macular edema. At 3 months postpresentation, there was no NVE around the occluded vein in the en-face SSADA image, but at 6 months, NVE appeared on the occluded veins. The en-face SSADA image showed the NVE structure in the fibrovascular membrane on the occluded vein more clearly than FA images.
  
  
  CONCLUSIONS
  OCT angiography clearly visualized the sprouting of NVE in an eye with hemi-CRVO. New findings of the vascular structure of NVE in hemi-CRVO were revealed using the en-face SSADA algorithm.
authors.affiliation: Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Sogawa
authors.affiliation: Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
authors.forename: Taiji
authors.initials: T
authors.lastname: Nagaoka
authors.affiliation: Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Ishibazawa
authors.affiliation: Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Takahashi
authors.affiliation: Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Tani
authors.affiliation: Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Yoshida
keywords: NVE; OCT angiography; hemi-CRVO