“…HCBC') poisoning was responsible for an outbreak of porphyria in Turkey in 1956 (Schmid, 1960) and exposure to other polychlorinated aromatic hydrocarbons may cause porphyria in workers manufacturing herbicides (Bleiberg, Wallen, Brodkin & Applebaum, 1974) or handling disinfectants (Lynch, Lee & Kushner, 1975). In man, these compounds are one cause of the syndrome known as porphyria cutanea tarda symptomatica or symptomatic porphyria, a form of hepatic porphyria which is seen most commonly in association with liver damage due to alcohol (Elder, Gray & Nicholson, 1972). Iron stores are increased in about two-thirds of European patients with symptomatic porphyria (Lundvall, 1971 ;Turnbull, Baker, Vernon-Roberts & Magnus, 1973).…”