Table 1.

Features predicting malignant transformation of choroidal nevus into melanoma are listed in the mnemonic ”TFSOM UHHD ‘to find small ocular melanoma using helpful hints daily’”. The percentages of choroidal nevus growth into melanoma based on number of involved features are reported along with recommended clinical monitoring [20,21].

Mnemonic	Feature	N of Features	Choroidal Nevus Growth into Melanoma (%)	Monitoring
To Find Small Ocular Melanoma Using helpful Hints Daily	Thickness > 2 mm	None	4%	Every 6 months Once a year (if stability persists)
	Fluid (subretinal)
	Symptoms  - decreased vision  - flashes/floaters	1 Feature	36%	Every 4–6 months
	Orange pigment
	Margin ≤ 3 mm to disc	2 Features	45%	Every 4–6 months
	Ultrasonographic hollowness
	Halo absence Drusen absence	3 or more Features	50%	Referral to Experienced Center      Primary treatment  Prognosis