CD8A and growth hormone-producing pituitary gland neoplasm: NF-PitNETs had more neutrophils than somatotropinomas (0.9 ± 0.1 vs 0.1 ± 0.1%, p = 0.002), but there were no differences regarding other immune cells, neither CD163:HLA-DR, CD8:CD4 or CD8:FOXP3 cell ratios (Additional file 6: Table S3).