The precancer nomenclature has been described previously:
Berman JJ, Henson DE. Classifying the Precancers: A Meta Data Approach. BMC Medical Informatics and Decision Making 3:8, 2003.
The precancer nomenclature has been incorporated into the latest version of the Developmental Lineage Classification and Taxonomy of Neoplasms.
A search-engine for precancer terms is now available at the site that had served the precancer nomenclature:
key words: nomenclature, medical nomenclature, classification, ontology, terminology, neoplasms, neoplasia, precancerous conditions, open source, free