Porphyrias Flashcards
Commonest porphyria?
Porphyria cutanea tarda
Rare porphyria
Variegate prophyria
Who does porphyria cutanea tarda affect?
Alcoholics
What is the enzyme involved in porphyria cutanea tarda?
Uroporphyrinogen decarboxylase
Presentation of PCT
blisters fragile skin hyperpigmentation hypertrichosis morphea
Management of PCT
Treat underling cause Alcoholics Hep C Haemochromotosis Oestrogen
What porphyria do children get?
Erthropoietic protoporphyria
What enzyme is responsible for Erthropoietic protoporphyria?
Ferrochelatase
Clinical signs of erthropoietic protoporphyria?
Painful, burning sensation after sun exposure
Tops of hands, feet, face and ears
Skin is red, swollen and blsitered
What other disease can manifest from erthropoietic protoporphyria?
liver disease: jaundice and gallstones
Management of erthropoietic protoporphyria?
Biannual LFTs and RBC porphyrins
Visible light protection - dark clothing, full sleeved, tinted windows, sunscreen and avoid midday sun
Treat the liver disease
Enzyme deficient in Acute Intermittent Porphyria
porphobilinogen deaminase
Uroporphyrinogen decarboxylase is the enzyme deficient in…
Porphyria cutanea tarda
Ferrochelatase is the enzyme deficient in…
Erthropoietic protoporphyria
PCT affects what group of people?
alcoholics