Melanocytoma of the optic disc.

Melanocytoma of the optic disc is a benign lesion. We report here a patient with melanocytoma who presented with gradual diminution of vision. On examination the left eye fundus showed a mass uniformly dark black in colour, on the optic disc occupying the superotemporal quadrant. The mass completely obscured the fluorescence on fluorescein angiography and was thus differentiated from malignant melanoma.