Case reports suggest that<unk>  is prevalent globally. The prevalence has been estimated somewhere between 1 in 75,000 and 1 in 200,000 however it has been noted that the prevalence of<unk>  may be increasing due to a better understanding of the disease and improved diagnosis. An estimated 5,000–10,000 individuals worldwide have<unk> .<unk>  is considered the most common form of porphyria in children. The prevalence in Sweden has been published as 1:180,000.
Erythropoietic protoporphyria
Xeroderma pigmentosum
Pseudoporphyria
Harderoporphyria
Thalassemia
Scurvy
Hemoglobinemia
Megavitamin-B6 syndrome