obsolete_Primary familial polycythemia true orphanet Familial erythrocytosis Primary congenital erythrocytosis ICD10:D75.0 Congenital polycythemia due to erythropoietin receptor mutation OMIM:133100 Primary familial and congenital polycythemia OMIM:617907 PFCP Congenital erythrocytosis due to erythropoietin receptor mutation http://purl.obolibrary.org/obo/MONDO_0007572 Primary familial polycythemia is an inherited hematological disorder resulting from mutations in the erythropoietin (EPO) receptor and is characterized by an elevated absolute red blood cell mass caused by uncontrolled red blood cell production in the presence of low EPO levels. 3.41.0 Replaced with Mondo term.