Table 2. Comparison of neuropilin-1 (NRP-1) and neuropilin-2 (NRP-2) expression in alveolar macrophages and interstitial macrophages in lung tissue remote to the cancer nest (physiologically normal lung) (n = 5).

Type of macrophages	Number of NRP-1 positive cellsA) (mean ± SD)	Number of NRP-2 positive cellsA) (mean ± SD)
Alveolar macrophages	9.2 ± 3.8*	8.9 ± 3.9*
Interstitial macrophages	0 ± 0*	0 ± 0*

* p< 0.01 significant between alveolar macrophages and interstitial macrophages by the Mann-Whitney U-test.

^A), average number of positive cells/high-power view fields.