A form of rare hereditary hemochromatosis, a group of diseases characterized by excessive tissue iron deposition of genetic origin. Type 3 hemochromatosis concerns middle aged-adults but also adolescents and young adults. It presents with liver disease, hypogonadism, arthritis, diabetes and skin pigmentation. The disease is caused by mutations of the transferrin receptor 2 gene (TFR2) on chromosome 7. Transmission is autosomal recessive.