Porphyria Cutanea Tarda (PCT)
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Porphyria cutanea tarda (PCT) is the most common type of porphyria, and it results from a defective uroporphyrinogen decarboxylase enzyme that is usually the result of a sporadic mutation. Porphyria cutanea tarda has a number of characteristic signs and symptoms, such as elevated uroporphyrin levels, tea-colored urine, and cutaneous findings.