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Friday 30 November 2007

Seborrheic keratosis

A 90-year-old woman consulted for a pigmented lesion on her forehead.
Dermoscopy revealed a brown pigmentation with multiple blue-gray dots.
The lesion was excised and pathology revealed a seborrheic keratosis.

This lesion was probably regressing to a lichenoïd keratosis (or lichen planus-like keratosis).

See the literature:

Zaballos P. et al. Dermoscopic pattern of intermediate stage in seborrhoeic keratosis regressing to lichenoid keratosis: report of 24 cases. Br J Dermatol. 2007 Aug;157(2):266-72