Evaluation of patients who present with signs or symptoms suggestive of porphyria cutanea tarda, hereditary coproporphyria, variegate porphyria, congenital erythropoietic porphyria, erythropoietic protoporphyria, or X-linked dominant protoporphyria.
Specimens smaller than 100 g may not provide interpretable results
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Mayo stool collection jar
Frozen (preferred) - 14 days
Refrigerated - 14 days
High-Performance Liquid Chromatography (HPLC)