Final answer:
Porphyria cutanea tarda causes skin lesions and hypersensitivity to light, red or pink urine upon exposure to sunlight, and possibly abdominal pain, vomiting, constipation, and paralysis due to a deficiency in the uroporphyrinogen decarboxylase enzyme.
Step-by-step explanation:
Porphyria cutanea tarda (PCT) is a condition that causes a variety of symptoms, most notably a sensitivity to light that can cause skin lesions and blisters, and urine that turns red or pink in sunlight. This disorder is due to a deficiency in one of the enzymes responsible for the heme synthesis pathway, specifically uroporphyrinogen decarboxylase (UROD). The deficiency leads to an accumulation of porphyrins in the skin and other tissues, which, when exposed to UV light, can result in damage. Alongside the cutaneous symptoms, individuals may experience abdominal pain, vomiting, constipation, and potential paralysis. PCT is a type of porphyria, which refers to a group of disorders characterized by problems with the body's chemical processes that produce porphyrins.