DO_rare_slim disease has basis in hemochromatosis type 4 MIM:606069 GARD:10094 SNOMEDCT_US_2025_09_01:719975002 MESH:C537249 UMLS_CUI:C1853733 ORDO:139491 disease_ontology A hemochromatosis that has_material_basis_in heterozygous mutation in the SLC40A1 gene on chromosome 2q32. DOID:0111028 HFE4 autosomal dominant hereditary hemochromatosis ferroportin disease hemochromatosis due to defect in ferroportin hemochromatosis structural_variant