4.6 Article

RAP study, report 1: novel subtype of macular neovascularisation type III, cilioretinal MNV3

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BRITISH JOURNAL OF OPHTHALMOLOGY
卷 105, 期 1, 页码 113-117

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BMJ PUBLISHING GROUP
DOI: 10.1136/bjophthalmol-2019-315311

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retina; angiogenesis; imaging; macula; neovascularisation

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The study on macular neovascularisation type III (MNV3) arising from cilioretinal arteries (CRAs) found that this condition can be solitary or accompanied by other macular neovascular lesions, often associated with extensive exudative maculopathy and intraretinal haemorrhage.
Purpose To report on patients with macular neovascularisation type III (MNV3) arising from cilioretinal arteries (CRAs) (cilioretinal macular neovascularisation type III (cMNV3)). Methods We reviewed baseline examinations of patients with neovascular age-related macular degeneration using multimodal imaging. We determined the type and distribution of MNV lesions in each cMNV3 case, the range of distances from the fovea, existence of exudative maculopathy, intraretinal haemorrhage and other morphological characteristics. 50 consecutive eyes with usual MNV3 without CRA were included as a control group. Results 102 eyes of 102 patients were identified with MNV3 lesions. Among these, we found 12 eyes (12%) with cMNV3, 84 eyes (82%) with usual MNV3 without CRA and 6 eyes (6%) with usual MNV3 with CRA. Ten cases of cMNV3 had one lesion, and two cases had two lesions. The lesions were distributed equally between the superior and inferior halves of the macula, whereas in the nasal and temporal halves, there were 8 (57%) and 6 (43%) lesions, respectively. All cMNV3 lesions were located between 500 and 1500 mu m from the central fovea except one, which was located between 1500 and 3000 mu m. None of the lesions had macular neovascularisation type I (MNV1) or macular neovascularisation type II (MNV2) elsewhere in both groups. Exudative maculopathy and intraretinal haemorrhage were found in seven (88%) and five (63%) of the eight pure cMNV3 cases, respectively. Conclusion cMNV3 can be solitary or multiple, isolated or accompanied with usual MNV3 lesions, but not with concurrent MNV1 or MNV2. It is frequently associated with extensive exudative maculopathy, intraretinal haemorrhage and subretinal fluid.

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