Acute Intermittent Porphyria (AIP)
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Acute Intermittent Porphyria (AIP) is a rare metabolic disorder caused by deficiency of porphobilinogen deaminase. This enzyme deficiency causes the accumulation of heme precursors, notably porphobilinogen and aminolevulinic acid (ALA). This then leads to a number of characteristic clinical findings, such as port wine-colored urine.