porphyria cutanea tarda

noun

porphyria cu·​ta·​nea tar·​da -kyu̇-ˈtā-nē-ə-ˈtärd-ə 

: a common porphyria that is marked by an excess of uroporphyrin caused by an enzyme deficiency chiefly of the liver and that is characterized especially by skin lesions produced by exposure to light, scarring, hyperpigmentation, and hypertrichosis