Cancer Classification via OncoTree Standardize cancer type nomenclature using the OncoTree ontology. Resolves free-text tumor descriptions to structured codes with UMLS/NCI cross-references, enabling downstream use in OncoKB variant annotation and GDC cohort selection. When to Use Apply when researcher asks about: - "What is the OncoTree code for [tumor description]?" - "Find all subtypes of [cancer type]" - "What cancers originate in [tissue]?" - "I need the tumor type code for OncoKB annotation" - "What is the TCGA/COSMIC code for [cancer]?" - "List all CNS/Brain cancer subtypes" - "What NC…