obsolete_Cockayne syndrome type 3 true http://purl.obolibrary.org/obo/MONDO_0008998 UMLS:C0751037 OMIM:216411 OMIM:216400 3.41.0 Replaced with Mondo term. OMIM:133540 Cockayne syndrome type 3 (CS3) is the mild form of Cockayne syndrome (CS, see this term) presenting later in childhood and characterized by clinical features similar to those associated with CS1 (see this term) but with normal growth and cognitive development. ICD10:Q87.8 orphanet