Novel OCT Angiography Features, von Hippel-Lindau Disease Association, and Genetic Characterization of Juxtapapillary Retinal Capillary Hemangiomas.

Abstract

Purpose: To present new clinical features of juxtapapillary retinal capillary hemangiomas (JRCHs), assess the risk of von Hippel-Lindau (VHL) disease, and explore the genotype-phenotype correlations in patients with JRCH.

Methods: Fifty patients with JRCH were included. Multimodal retinal imaging including optical coherence tomography angiography (OCTA), visual acuity, presence of peripheral RCHs, affected lateralities, systemic evaluation for VHL disease, and underlying VHL variants were reviewed.

Results: Of 59 eyes, 48 had classic JRCHs, whereas 11 had atypical JRCHs (type B, if it broke through the inner limiting membrane: 3 eyes; type A, if not: 8 eyes). Compared with atypical type A, which was indolent, type B might warrant surgical interventions. Better final visual acuity (P < 0.0001), fewer peripheral RCHs (P = 0.02), and lower prevalence of large peripheral RCHs (>1.5 mm) (P = 0.027) were observed in eyes with atypical JRCHs than classic JRCHs. VHL was diagnosed clinically in 72% of patients, and 22 VHL variants were identified, including 5 novel variants. Patients with truncating variants had a higher prevalence of atypical JRCHs than those with single amino acid substitution/deletion variants (P = 0.009). Patients with bilateral VHL-JRCHs were more likely to have large peripheral RCHs (P = 0.02) and less likely to harbor β-domain single amino acid substitution/deletion variants (P = 0.066) than those with unilateral VHL-JRCHs.

Conclusions: Atypical JRCHs, with distinctive OCTA characteristics and favorable visual outcomes, are less complicated by peripheral RCHs and more relevant to truncating variant genotypes. JRCH monitoring should incorporate OCTA classification and genotype analysis.