Establishing a biochemical diagnosis of erythropoietic protoporphyria and X-linked dominant protoporphyria
Patient should abstain from alcohol for 24 hours.
Immediately following collection, place the specimen on wet ice.
If the total erythrocyte porphyrin value is ≥80 µg/dL, the protoporphyrin fractionation (PPFE) assay will be automatically performed at an additional charge. The PPFE test results include free protoporphyrin and zinc-complexed protoporphyrin.