“…Subsequent reports established that 'porphyria cutanea tarda' was predominantly a disease of men over the age of 40, who frequently gave a history of alcoholism and showed evidence of liver dysfunction and that both attacks of acute porphyria and a family history of porphyria were uncommon in this group (Szodoray and Sumegi, 1944;Brunsting, Mason, and Aldrich, 1951;Brunsting, 1954). However, there were also accounts of a less common cutaneous porphyria in which both photosensitivity and acute attacks occurred (Gray, Rimington, and Thomson, 1948;Watson, 1951 ;MacGregor, Nicholas, and Rimington, 1952;Rimington, 1952;Calvert and Rimington, 1953;Discombe and Treip, 1953;Wells and Rimington, 1953;Holti, Rimington, Tate, and Thomas, 1958). In general these patients were younger than the former group and in some there was evidence of porphyria in other members of the family although there was no difference between the skin lesions in the two groups.…”