Porphyria Cutanea Tarda

Porphyria Cutanea Tarda is a condition that affects the skin, causing it to become fragile and blister easily, especially in areas exposed to sunlight. It involves problems with the body's ability to produce heme, a component of red blood cells that carries oxygen. This leads to a buildup of certain chemicals that make the skin sensitive to light, resulting in blisters, skin fragility, and increased pigmentation. The condition primarily affects the liver and skin, and symptoms often worsen with sun exposure. People with this disorder may notice dark urine and scarring on sun-exposed areas. It is one of the most common types of porphyria and can be triggered by factors like alcohol, certain medications, or liver disease.

Porphyria Cutanea Tarda (PCT) is a disorder caused by a deficiency of the enzyme uroporphyrinogen decarboxylase (UROD), leading to impaired heme biosynthesis. This enzyme deficiency results in the accumulation of uroporphyrins and other porphyrinogens, which are photosensitizing compounds that cause cutaneous manifestations. PCT is often acquired due to factors such as alcohol use, hepatitis C infection, estrogen therapy, or iron overload, although familial forms exist due to mutations in the UROD gene. The hallmark clinical features include photosensitivity, blistering skin lesions, hyperpigmentation, and hypertrichosis on sun-exposed areas. The disease primarily affects the liver and skin, with potential for chronic liver damage. Diagnosis and management focus on identifying and reducing precipitating factors and controlling porphyrin accumulation.