Abstract
girl was referred for evaluation of a retinal tumour in her left eye. Her visual acuity was 20 ⁄ 20 bilaterally. A solitary translucent retinal tumour measuring 1.5 · 3.0 disc diameters was seen inferior to the optic disc (Fig. 1A). The retinal arteries passing through the tumour appeared white. The sensitivity over the tumour was not altered in Humphrey visual field tests (Fig. 1B). Fluorescein fundus angiography (FA) showed retinal circulation to be intact with only weak staining of a section of the tumour (Fig. 1C,D). An ultrasound B-mode echography showed a mass inferior to the optic disc; no calcifications were observed (Fig. 1E). The fundus was scanned with optical coherence tomography (OCT) (3D OCT-1000; Topcon, Tokyo, Japan). The measurement beam was focused on the macular area with a system
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