Single-cell analyses revealed key tumor-infiltrating myeloid cell subsets associated with clinical outcomes in different subtypes of breast cancer

Breast cancer is the most common cancer and the leading cause of cancer death in women worldwide.1 Tumor-infiltrating myeloid cells(TiMs),key components of tumor microenvironment,are considered to be potential therapeutic targets for cancer recently,2.3 however,their heterogeneity remains insufficiently characterized in different breast cancer subtypes.A more detailed TIM transcriptional atlas across breast cancer subtypes at the single-cell level is required to better understand the underlying mechanisms influencing the prognosis of breast cancer patients.