Tumor cells play a vital role in metastasis development, immune evasion and pathological prediction. SCAR_CT collects the datasets of all kinds of tumor cell types including tumor-Infiltrating T cells, tumor-Infiltrating B cells, tumor-associated macrophages, tumor-associated dendritic cells, cancer-associated fibroblasts and endothelial cells etc. In addition, the SCAR_CT module also categorizes the biomarkers of these cells for query.