NCIthesaurus disease has location mastoiditis NCI:C128368 DOID:0060322 UMLS_CUI:C0024904 SNOMEDCT_US_2025_09_01:155230007 disease_ontology 2015-02-25T16:29:09Z ICD10CM:H70.9 MESH:D008417 ICD9CM:383.9 A middle ear disease characterized by an inflammation of the mucosal lining of the mastoid antrum and the mastoid air cell system inside the mastoid process. bone inflammation disease middle ear disease middle ear