Description: Pigmented seb k with heavily pigmented cells in stratum corneum

History:

 This lesion had been present on the lower leg anteriorly for 2 years. Slowly becoming larger with a densely adherent surface scale. The scale was removed to reveal the underlying dermatoscopic features with different coloured clods and no real network.

The histology shows a heavily pigmented seborrhoeic keratosis with pigment cells being seen in the stratum corneum explaining the black colour.