This paper tried to introduce the theory of sores and ulcers of traditional Chinese medicine（TCM） external medicine into oncology

so as to explore the clinical significance of this theory in syndrome differentiation and treatment of tumors. Based on the conceptual analysis

the TCM understanding of tumor micro-environment

and the relationship between tumor metastasis and the sores-ulcers nursing field theory

the similarity and interoperability between sores-ulcers and tumors were analyzed from the perspectives of etiology and pathomechanism

evolution of disease and syndromes

prescriptions and medication. Moreover

the theory of "cancer and ulcer similarity" was explored

and the concept of "keeping mutual correspondence between syndrome differentiation and treatment

and treating tumors with reference to the management of ulcers" was put forward

trying to provide ideas and methods for the differentiation and treatment of tumors.