Wiktionary
poikiloderma
n. (context pathology English) An atrophy of the skin that is accompanied by a mottled pigmentation
Wikipedia
Poikiloderma
Poikiloderma is a skin condition that consists of areas of hypopigmentation, hyperpigmentation, telangiectasias and atrophy.
Poikiloderma is most frequently seen on the chest or the neck, characterized by red colored pigment on the skin that is commonly associated with sun damage.