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Introduction
Melanocytoma of the optic nerve head
Dead Giveaways
Appearance is the biggest indicator:
Indistinct edges taht appear feathery, reading from the ONH in an arcuate fashion. It can sometimes affect the magnocellular pathway cells
diagnostic features
When observed, important to establish a baseline and then follow up every 3-6 months, then reviewed yearly for any change. If changes, refer to ophthalmologist or ocular oncologist.
Other Features:
Usually minimal growth and symptoms, but slowly growing ONH
Can lead to RAPD (30%), subretinal fluid (10%) and enlarged blind spot (75%)
Growth next to nerve can compress ON
Loss of vision + VF defects
CRVO if blood vessels are compressed
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