FEVR Mostly AD inheritance Defect in Wnt -NORRIN signal pathway genes : NDP, FZD4, LRP5, TSPAN12, ZNF408 Defective retinal angiogenezis : insufficient vascular differentiation Peripheral retinal vascularization is incomplete 21- 64% RD: Tractional +/- exudative
Clinical Findings Peripheral avascular areas ( esp . temporal ) Straightenning of vessels , macular ectopia Peripheral vascular loops abnormal telangiectatic vessels , hard exudates , NV Fibrovascular proliferation : Macular fold Exudative and TRD
Vitreous Disgenic vitreous (FEVR, Norrie , PFV, ROP) Vitreo-retinal adhesion is very strong Hyaloid membrane is multilaminar like onion rings Posterior hyaloid contracts following LPC or Anti-VEGF treatment Akito Shimouchi et al. Int Ophthalmol (2013) 33:711–715, Yonekawa Y et al. Ophthalmology 2015;122:2270-2277
Diagnostic tips Presence of family history: Present in 45% of the cases, Asymptomatic family members (Family screening!) No Prematurity history Bilateral findings: Asymmetry! Presence of exudation! Life long progressive disease in spite of treatment!
Asymptomatic family members Ultrawidefield FA!
37y old , Father , No known ocular problems , VA: 1.0/0.7
Newborn sibling of 2 days old , term baby
ROP: Classical regular homogeneous vascularization pattern at the ridge DIFFERENTIAL DIAGNOSIS FEVR VS ROP FEVR: Irregular vascularization and sprouting beyond transition zone Vascular prunning Pinpoint hiperfluorescent dots
Differential Diagnosis Peri ph er al avas c ul a r retina: ROP Incontinentia Pigmenti Norrie Disease (M) Tractional RD: PFV! Toxocara , Toxoplazma Retinal Exudative RD: Coats ! Ne ovas c ulari z a ti on: IRVAN, Eales
Treatment Options LASER STAGE 1: Peripheral avascular retina STAGE 2: Retinal NVE SURGERY STAGE 2: Retinal NVE- Vit Hem STAGEÂ 3: Macula on RD ( macula ectopic ) STAGE 4: Macula off RD ( macular fold ) STAGE 5: Total RD
19y old , M, FEVR, VA: 0.03, Fellow eye is NVG- Absolute
6y old girl , bilat TRD, VA : 0.05
OPTOS RE: VA: 0.3
L E: VA: 0.2
VA: 0.2
How to follow FEVR cases ? May be asymmetric ! Fellow eye should be carefully examined ! (FA) It is progressive life long ! May need additional laser treatments even surgery !
34 wk , 1700gr BW, girl baby Microcephaly since 6 mo old 14mo old at presentation RE: Esotropia Mental -Motor Retard ( mild-moderate )
WHAT TO DO NEXT?
DIAGNOSIS? ROP? FEVR? ROPER! John VJ, McClintic JI, Hess DJ, Berrocal AM. Ophthalmic Surg Lasers Imaging Retina. 2016. Retinopathy of Prematurity Versus Familial Exudative Vitreoretinopathy : Report on Clinical and Angiographic Findings .
LAPPEL Sign LA te - P hase angiographic posterior and PE ripheral vascular L eakage Retinal e ndot h el ial cell in fla m ma tion marker Capillary dropout precursor Thanos A, Todorich B, Trese MT. A Novel Approach to Understanding Pathogenesis and Treatment of Capillary Dropout in Retinal Vascular Diseases. Ophthalmic Surg Lasers Imaging Retina. 2016
Anti- VEGFs in FEVR? The role of intravitreal ranubizumab in the treatment of FEVR of stage 2 or greater . Lu YZ et al. Int J Ophthalmol . 2018 As primary treatment ? Tagami M, Kusuhara S, Honda S, Tsukahara Y, Negi A. Rapid regression of retinal hemorrhage and NV in a case of FEVR treated with IVit bevacizumab . Graefes Arch Clin Exp Ophthalmol . 2008 ( case report ) As an adjunct to LPC/ VRS? Henry CR, Sisk RA, Tzu JH, Albini TA, Davis JL, Murray TG, Berrocal AM. Long-term follow-up of IVit bevacizumab for the treatment of pediatric retinal and choroidal diseases . J AAPOS. 2015. As a last option in persistent NVE / Exudation ? Quiram PA, Drenser KA, Lai MM, Capone A, Jr , Trese MT. Treatment of vascularly active FEVR with Macugen . Retina. 2008
Anti- VEGFs in FEVR? 13 cases 7 eyes with Stage 2/3A: As an adjunct to LPC 6 eyes with Stage 3B/4B: as an adjunct to Scleral buckle and / or PPV TRD progressed shortly after IVB in 3 of them and 2 eyes ended up with phytisation ! Henry CR, Sisk RA, Tzu JH, Albini TA, Davis JL, Murray TG, Berrocal AM. Long-term follow-up of IVit bevacizumab for the treatment of pediatric retinal and choroidal diseases . J AAPOS. 2015.
Steroid injections in FEVR?
LSV LV Gazi University Data 54 eyes , Family history in 33% SB LPC TREATMENTS
Family history (-) Screening of 1st degree relatives Peripheral retnal findings in 37/51 (72.5%) with UWFFA
Peripheral loop-shunt-anastomozis (66.6%)
Take Home Messages Be careful for asymetric disease ( fellow eye ) Family screening for the asymptomatic family members Life long follow-up with FA and need for lasers VR Surgery and laser saves these eyes .