chronic frontal sinusitis disease_ontology NCI:C34473 A frontal sinusitis which lasts for 12 weeks or more. This causes steady headache, localized tenderness and intermittent, purulent nasal and postnasal drainage. SNOMEDCT_US_2015_03_01:195786002 UMLS_CUI:C0008683 DOID:10790 ICD9CM:473.1 ICD10CM:J32.1 SNOMEDCT_US_2015_03_01:155527004 SNOMEDCT_US_2015_03_01:60130002 frontal sinusitis