- Comparing the cellular immune components in normal breast tissue lobules by looking at immune infiltrates [B cells (CD20), cytotoxic T cells (CD8), helper T cells (CD4), dendritic cells (CD11c), leukocytes (CD45), and monocytes/macrophages (CD68)] in normal breast of lean women and obese women pre- and 14 day and 1 year post-bariatric surgery.