DO_cancer_slim NCIthesaurus existence starts during non-Langerhans-cell histiocytosis juvenile xanthogranuloma MESH:D014972 disease_ontology DOID:4424 UMLS_CUI:C0043324 ICDO:9749/1 NCI:C3451 SNOMEDCT_US_2025_09_01:71709009 A non-Langerhans-cell histiocytosis is characterized as a benign skin lump or bump caused by a collection of cells called histiocytes. These may be red, orange or tan at first, but over time may become more yellow in color. These bumps usually appear on the head, neck and trunk. Multiple eruptive juvenile xanthogranuloma Naevoxanthoendothelioma Xanthoma neviforme Young adult onset