Optical coherence tomography angiography characteristics of polypoidal choroidal vasculopathy

Abstract

The OCT-A is a non-invasive imaging modality allowing the visualisation of different structures in PCV. The BVN is constantly clearly detected. The hypoflow round structure appearance of the polyp in OCT-A, is probably due to an unusual blood flow inside the polypoidal lesions, contrasting with the BVN. Further improvement in OCT-A knowledge will provide information on the specificity of the different intensity characteristics in PCV.

Spectral-Domain Optical Coherence Tomography Angiography for the Diagnosis and Evaluation of Polypoidal Choroidal Vasculopathy

“…The lowflow polyps were more difficult to detect. These same findings were also noted by Srour et al [27]. For the polyps that were not seen in this study on OCTA, the blood flow may have been simply too slow to show at all on OCTA.…”

Comparison of OCT angiography and indocyanine green angiographic findings with subtypes of polypoidal choroidal vasculopathy

“…Kim et al 12 also reported that only 50% of polyps were hyper-reflective on OCTA. Srour et al 13 recently reported that 25% of polypoidal lesions showed increased flow around lesion structures. Although they did not mention which type was more easily detected, we suspect that type 2 would have been more readily detectable.…”

Polypoidal Choroidal Vasculopathy

“…reported BVNs were clearly and consistently detected as hyperflow lesion on OCT-A, but polypoidal lesions had variable signs including hyper-flow round structures surrounded by a hypo-intense halo in some cases and hypo-flow round lesions in most cases (Figure 1F). (71) Hypo-intense round structures are thought to be due to low flow signal within polypoidal lesions. (71) Most studies found a higher detection of PCV polyps using ICGA compared to OCT-A.…”