Choroidal Macrovessel

A choroidal macrovessel appears on fundus photography (Canon CR-2) as an abnormally dilated, tortuous vessel (Fig 1A) that can be misdiagnosed as a parasitic track-like lesion. Evaluation using enhanced depth imaging-optical coherence tomography (OCT) (Spectralis OCT; Heidelberg Engineering, Heidelberg, Germany) reveals prominent hyporeflective vasculature occupying the entire thickness of the choroid (Fig 1B, asterisk), with tent-like elevations of the retinal pigment epithelium and indentation of the photoreceptors (Fig 1B, arrowhead).