Relation between natural killer cells and neoplastic cells in serous fluids.
Natural killer (NK) cells are capable of lysing certain tumor cells in vitro.
The aim of this study was to determine whether NK cells are present in serous fluids and whether they are capable of lysing tumor cells. The presence of NK cells was determined by flow cytometry in the fluids of patients with serous ovarian cancer (n = 20), benign ovarian tumors (n = 20), and normal ovar