Rare cause of warty skin
You may see this in some women who have intertrigo and lots of flat, skin-coloured seborrhoeic keratoses under the breasts which appear macerated like this. If there are no seborrhoeic keratoses, consider Hailey-Hailey and Darier’s.
This is Darier’s disease with keratotic papules extending outwards. You can also see slight fissuring of the skin. Check behind the ears for the characteristic greasy papules and consider using a small dose of an oral retinoid to