Electronic supplementary material
Melanoma and the foot
Detection of melanoma
The three point technique
Examined in both axes, using the dermatoscope. Colour and structures are assessed. Significant asymmetry of colour or structures within the lesion are recorded as a score of 1.
Atypical pigment network
Many naevi have a uniform reticular pattern to the pigment distribution resembling chicken wire or a honeycomb structure with regular brown or black lines. An atypical network is recorded as a score of 1 if the network is irregular in thickness, irregular holes, or irregular colours.
Blue structures or blue-white veil
The presence of any blue structure observed including a blue-white veil scores 1.