ICD-11 definition : This rare erythropoietic variant form of hereditary coproporphyria is characterized
by neonatal hyperbilirubinemia and hemolytic anemia, hepatosplenomegaly, and sometimes
photosensitivity. Several families with harderoporphyria have been reported. Molecular
analysis indicates that a coproporphyrinogen oxidase gene abnormality, K404E, was
unique for this disease.;
This rare erythropoietic variant form of hereditary coproporphyria is characterized
by neonatal hyperbilirubinemia and hemolytic anemia, hepatosplenomegaly, and sometimes
photosensitivity. Several families with harderoporphyria have been reported. Molecular
analysis indicates that a coproporphyrinogen oxidase gene abnormality, K404E, was
unique for this disease.