Multiple naevi is a challenge, but asymmetry can aid diagnosis

Patients with multiple naevi pose particular challenges but asymmetry aids diagnosis.
Two risk factors give a patient a high risk of melanoma, defined in the Australasian melanoma guidelines as a relative risk (RR) > 5.

A history of a previous melanoma confers the highest risk (RR 10) while a naevus count greater than 100 gives a RR of 7.

According to Australasian guidelines, such patients should have a complete skin