ILC populations in benign (p values ILC1: 0.01, ILC2: 0.01, ILC3:0.0001, NK: 0.04) and malignant (p values ILC1: 0.0001, ILC2: 0.009, ILC3:0.003, NK: 0.0005) breast tumour tissue express significantly higher level of HLA-DR compared to peripheral blood (Fig. 3a, and Additional file 1: Figure S2 and Additional file 1: Figure S3). The gene discussed is CCL27; the disease is breast neoplasm.