DO_infectious_disease_slim gram-negative_bacterial_infectious_disease sexually_transmitted_infectious_disease NCIthesaurus transmitted by syphilis tertiary syphilis MESH:C536774 DOID:8200 A syphilis that is characterized as the third stage of syphilis that develops after the disappearance of the secondary symptoms and is marked by ulcers and gummas under the skin and commonly by involvement of the skeletal, cardiovascular, and nervous systems. ICD10CM:A52 ICD9CM:097.0 disease_ontology UMLS_CUI:C0153188 SNOMEDCT_US_2025_09_01:72083004 NCI:C128414 late syphilis contact transmission