Free erythrocyte protoporphyrin (FEP)
Description:
FEP is a test offered by the SAAS Porphyria Service in Reference Biochemistry at King’s College Hospital. Quantitative measurement of FEP is reported with zinc protoporphyrin (ZPP) using fluorescence spectroscopy.
Clinical details:
FEP is present in red blood cells and combines with iron to form haem. FEP is elevated in patients with erythropoietic protoporphyria (EPP) and X-linked protoporphyria (XLPP).
Reference range:
<200 nmol/L red cells
Synonyms or keywords:
FEP
Department:
Location:
Last updated: 03/02/2017
