Hemochromatosis, Type 2a, also known as hemochromatosis type 2a, is related to rare hereditary hemochromatosis and hemochromatosis, type 2b, and has symptoms including lethargy and weakness. An important gene associated with Hemochromatosis, Type 2a is HJV (Hemojuvelin BMP Co-Receptor), and among its related pathways/superpathways is TAR syndrome. Affiliated tissues include heart and skin, and related phenotypes are hepatomegaly and increased serum iron