The International System for Human Cytogenetic Nomenclature is an international standard that provides a set of guidelines for naming human chromosomes and describing chromosome abnormalities. It includes specific band names, symbols, and abbreviated terms used in cytogenetic studies. This system is maintained by the National Cancer Institute and is documented in the NCI Thesaurus under the code C156450.The International System for Human Cytogenetic Nomenclature is an international standard that provides a set of guidelines for naming human chromosomes and describing chromosome abnormalities. It includes specific band names, symbols, and abbreviated terms used in cytogenetic studies. This system is maintained by the National Cancer Institute and is documented in the NCI Thesaurus under the code C156450.