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Sunday 16 December 2007

Parallel ridge pattern

A 27-year-old woman consulted for this pigmented lesion on the sole of her left foot present for 2 months. Dermoscopy revealed a parallel ridge pattern and the presence of aggregated black globules, well seen at the border of the lesion (red circle): this unique dermoscopic feature named "pebbles on the ridges" is typical of a subcorneal haemorrhage (or subcorcorneal hematoma, black heel).