DO_FlyBase_slim NCIthesaurus has phenotype immune system disease disease primary immunodeficiency disease MIM:PS300755 disease_ontology MIM:242850 UMLS_CUI:C0021051 SNOMEDCT_US_2025_09_01:191005003 ICD10CM:D84.9 MESH:D007153 DOID:612 ICD9CM:279.3 An immune system disease that results when one or more essential parts of the immune system is missing or not working properly at birth due to a genetic mutation. NCI:C39725 KEGG:05340 Xref MGI. hypoimmunity immune deficiency disorder immunodeficiency syndrome Abnormality of immune system physiology