Kaposi’s disease /kap″əsēz/ [Moritz K. Kaposi, Austrian dermatologist, 1837–1902; L, dis + Fr, aise, ease] , a rare inherited skin disorder that begins in childhood and mainly involves exposed skin areas. Exposure to sunlight results in erythema and vesiculation, followed by increased pigmentation and telangiectasia, skin ulcers, warts, and malignant epitheliomas. Also called xeroderma pigmentosum.