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The Three Point Checklist
The three point check list algorithm is the simplest algorithm which attempts to diagnose a melanoma, however it tends to overcall them. In other words it has a high sensitivity but a low specificity.
The three features are asymmetry of colour, asymmetry of network and blue or white structures. Each of these counts as one point. Two points or more are suggestive of melanoma and merit cutting the lesion out.
View this example in the Atlas

Question: What score would you give this lesion?

Answer: You need the dermatoscope view to analyse this lesion for the algorithm but it is at least 2 on morphology. This was an early invasive melanoma of superficial spreading type.

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