Anatomic features of choroidal naevi: Swept-source optical coherence tomography vs Enhanced depth imaging tomography. Preliminary results in 31 patients
Abstract
Purpose
To assess the anatomic retinal and choroidal features of choroidal naevi using swept-source optical coherence tomography (SS-OCT) and enhanced-depth optical coherence tomography (EDI-OCT).
DESIGN
Observational case series.
Methods
Patients with choroidal lesions underwent clinical examination, B-scan ultrasound and imaging with SS-OCT and EDI-OCT. Location, dimensions, clinical and OCT retinal and choroidal features were recorded. Descriptive statistics were used.
Results
Case series included 31 patients. 27/31 naevi imaged were melanotic and 4/31 amelanotic with a an overall median thickness of 0.7 mm. Naevus configuration was plateau in 17/31 cases, dome in 10/31 cases and mixed in 4/31 cases. RPE and photoreceptor layer disruption were noted in 14/31 cases and 13/31 had no retinal changes. Subretinal fluid was noted in 6/31 cases. Bruch`s membrane was found intact in 26/31 cases on both modalities. Intrinsic hyperreflectivity was noted in 29/31 cases on EDI-OCT and 30/31 cases on SS-OCT with less optical shadowing. The posterior margin of the naevus was visualized in 11/31 cases with SS-OCT and in 6/31 cases with EDI-OCT. Intratumour vessels were visualized in 28/31 cases with SS-OCT and 23/31 cases with EDI-OCT. For both modalities choriocapillaris appeared compressed and abnormal in 20/31 cases.
Conclusions
These preliminary results indicate that imaging of choroidal naevi with SS-OCT enables better visualization of intratumour vessels and the posterior margin.
