Figure 2. Diagnosis Algorithm for Acute Neurovisceral Symptoms Leading to Suspicion of Porphyria
* Biochemical markers also detected in the latent phase.
ADP, aminolevulinic acid dehydratase porphyria; AIP, acute intermittent porphyria; ALA, aminolevulinic acid; HCP, hereditary coproporphyria; HMBS, hydroxymethylbilane synthase; PBG, porphobilinogen; VP, variegate porphyria.