Misinterpretation of test results
Incorrect diagnoses of Porphyria can occur in patients having minimal abnormalities in laboratory tests, such as small elevations in urinary porphyrins or porphyrin precursors that in fact have little or no diagnostic significance. Incorrect diagnoses are less likely if reliance is placed on a few first-line tests in most clinical situations, as described above. Overuse and over interpretation of minor abnormalities in results of second-line tests including erythrocyte PBGD, other enzyme assays, and fractionation of urinary and fecal porphyrins, account for many incorrect diagnoses of Porphyria.
AT PRESENT LABCORP & QUEST ARE NOT RECOMMENDED FOR EPP TESTING.
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