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Friday, 16 November 2007

Pebbles on the ridges

Subcorneal haemorrhage (*) is a differential diagnosis of acral melanoma. This patient who was a squash player consulted for this pigmentation of his anterior right foot. Dermoscopy revealed multiple brown pebble-like droplets on the ridges. This is a unique feature in dermoscopy named "pebbles on the ridges"
Brown sattelites (circled on the picture) were a helpful clue for the diagnosis. Superfical shaving of the corneal layer with a blade confirmed the diagnosis.
* subcorneal hematoma and black heel are synonyms.