Porphyria

Porphyrias are inherited/enzyme defects of heme biosynthesis, grouped as acute (neurovisceral) and cutaneous. Acute porphyrias (acute intermittent, variegate, hereditary coproporphyria) present with severe abdominal pain, neuropathy, neuropsychiatric disturbance, and dark urine, often triggered by drugs, alcohol, fasting. Cutaneous porphyrias (porphyria cutanea tarda, erythropoietic protoporphyria) cause photosensitivity and skin blistering. Treatment: avoid triggers, carbohydrate loading/hemin for acute attacks, beta-carotene/phlebotomy for cutaneous forms.

Common Symptoms

Acute: severe abdominal pain; neuropathy; neuropsychiatric symptoms; dark urine. Cutaneous: photosensitivity; blistering; skin fragility

Causes and Pathogenesis

Heme-pathway enzyme defects cause accumulation of porphyrin precursors (ALA/PBG) causing neurovisceral toxicity, or porphyrins causing photosensitizing skin damage.

Treatment

Acute: hemin, glucose/carbohydrate loading, avoid triggers; cutaneous: beta-carotene, phlebotomy, sun protection

Preventive Measures

Avoid precipitant drugs/alcohol/fasting; sun protection; genetic counseling.

Department to Visit

It is recommended to visit the Hematology department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.