A lonely lesion on a 69 yr old male. Lonely lesions that are changing and are multi-coloured are of concern and need urgent assessment.
This is the Dermatoscopy view of the lesion in the picture above. The surrounding brown pigment is the remnants of a Solar Lentigo. Centrally there is chaos with blue & grey pigment clods and this makes it highly likely that this is a Melanoma arising within a Solar Lentigo. The other minor clues include the white lines at right angles to each other under the polarised light. Higher magnification reveals polymorphous blood vessels. The definition of white lines is that they must be lighter than the surrounding skin. This MUST go under the microscope - will let you know when I have the histology report. Histology Melanoma in situ
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