Table 1

Effect of NK cell depletion and platelet depletion on lung metastasis

Numbers of micrometastases and percentage of inoculated tumor cells were assessed based on counted tumor lung colonies, thickness of tissue sections, and lung volume.
NK cells	Platelets	Inoculated tumor cells	Micrometastases per			% of inoculated tumor cells
NK cells	Platelets	Inoculated tumor cells	mm²	mm³	Lung	% of inoculated tumor cells
Present	Present	1 × 10⁶	8	160	5.5 × 10⁴	5.5
Present	Absent	1 × 10⁶	0.4	8	2.8 × 10³	0.3
Absent	Present	3 × 10⁴	4	80	2.8 × 10⁴	93
Absent	Absent	3 × 10⁴	4	80	2.8 × 10⁴	93