The invention relates to the technical field of
tumor marker detection, in particular to a
breast cancer lung metastasis related biomarker screening
system which comprises a differential genetic factor mining module, a function association module, a
verification screening module, an
interference elimination module and an optimization integration module. According to the method, the candidate genetic factors highly associated with
lung metastasis are extracted, and the expression fluctuation characteristics are combined to carry out
difference analysis, so that the preliminary screening accuracy is improved,
pathological information and pathway
annotation are integrated to construct an action network, pathway weights are analyzed, and functional expressions of the candidate factors are quantitatively evaluated; an independent sample is called to verify transcription consistency and clinical relevance, interference factors with poor
repeatability are eliminated, non-
tumor tissue high-expression interference items are rejected in combination with background transcription characteristics, the specificity and adaptability of screening results are improved, and finally a marker set with
metastasis mechanism indicating significance and
prognosis prediction value is formed through comprehensive evaluation. And clinical transformation support is provided for identification of
lung metastasis of
breast cancer.