Abbreviations
ALA, aminolevulinate synthase ;ALT, alanine aminotransferase;AST, aspartate aminotransferase ;DIF, direct immunofluorescence; EBA,epidermolysis bullosa acquisita; FEP, free erythrocyte protoporphyrin; GGT, gamma-glutamyl transferase; HCC, Hepatocellular carcinoma; HIV,human immunodeficiency virus; PAS staining ,periodic acid-schiff stain;PCT, porphyria cutanea tarda; UROD, uroporphyrinogen decarboxylase;