title: Tumor heterogeneity.
mesh_terms: D000818:Animals; D002471:Cell Transformation, Neoplastic; D006801:Humans; D009154:Mutation; D009362:Neoplasm Metastasis; D009369:Neoplasms / Q000145:classification / Q000235:genetics / Q000503:physiopathology*; D009857:Oncogenes