NCIthesaurus ankylosis DOID:227 ICD10CM:M24.6 MESH:D000844 MESH:D000844 UMLS_CUI:C0003090 NCI:C171941 disease_ontology An arthropathy where there is a stiffness of a joint, the result of injury or disease. The rigidity may be complete or partial and may be due to inflammation of the tendinous or muscular structures outside the joint or of the tissues of the joint itself. SNOMEDCT_US_2025_09_01:36504009 ICD9CM:718.5 arthropathy