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Porphyrias are disorders of the haem biosynthesis which are encountered infrequently and which often present themselves atypically as a combination of gastrointestinal, neurologic and/or dermatologic symptoms. Although they are primarily caused by enzyme defects, inheritance patterns are mostly not evident. Considering all of these characteristics, it is not surprising that there is a long delay between the onset of symptoms and the diagnosis of the disease, with as possible consequences impaired quality of life, irreversible neurologic