Figure 6B illustrates 13 distinct clusters identified using CiteSpace, covering topics such as “tumor-infiltrating lymphocytes”, “immunotherapy”, “T cell”, “programmed death ligand 1”, “triple-negative breast cancer”, “xCell”, “Her2-positive breast cancer”, “immune profile”, “machine learning”, “dendritic cell”, “B7-H1”, “tumor biology”, and “immunology/immunobiology”. The gene discussed is CD274; the disease is breast cancer.