Description: Alternative polarising dermoscopy with Dermlite IIHR. Note the parallel/antiparallel white streaks which are a polarising artefact, chrysalids. These tend to obscure features noted in non-polarising view. Chrysalids most common in BCC but occasionally seen in melanoma.

History: Enlarging pigmented lesion over hte last 12 months. No past history, but mother died of melanoma. Histology reported as: The shave shows level 2 superficial spreading malignant melanoma. It is non-ulcerated and has a Breslow thickness of 0.5mm. There is an occasional dermal mitosis present indicating that the lesion is in vertical growth plane. No lymphovascular or perineural infiltration is identified. There is evidence of focal regression.