Poikiloderma of Civatte
Poikiloderma of Civatte is a relatively common, benign condition that presents as a combination of skin atrophy, telangiectasias, and reddish-brown mottled hypopigmentation and hyperpigmentation of the lateral neck and chest, sparing the underside of the chin. This condition most commonly occurs in fair-skinned individuals, more in females than in males. The condition can be caused by a variety of reasons, most commonly chronic sun exposure. Other causative factors can include photosensitizing chemicals in perfumes and other cosmetics applied to the neck and chest.