Eric EHRSAM, MD is a dermatologist practicing dermoscopy.
Practice: Lille (FRANCE)
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Friday, 30 November 2007
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