This video tells us about the most commonly occurring porphyria known as Pporphyria cutanea tarda, its clinical manifestations, causes and associated effects. Porphyria cutanea tarda (PCT) is a rare disorder characterized by painful blistering, skin lesions that develop on sun-exposed skin (photosensitivity). TIMELINE: 0:01 Introduction 0:10 Porphyria cutanea tarda (PCT) 0:32 What causes PCT? 0:49 Manifestations of PCT 1:25 End