Case of lichen planus ruber

Watercolour drawing of the right side of the chest and shoulder of a man aged 24. The skin round the axilla is red and raised, and in a warty condition. There are other similar patches on the shoulder and side of the chest, but the skin is not quite so much thickened. Numerous dark discoloured patches, without any thickening of the integument, occur elsewhere, especially on the upper arm. It was considered to be a case of lichen planus ruber. The disease had existed for four years.