NCAM1 and skin basal cell carcinoma: In stark contrast, there was near absence of NK cells (CD56+HLA-DR+) in BCC (1.53% ± 1.00% [n = 7]) compared with SCC (22.21% ± 9.80% [P < 0.01, n = 6]) and normal skin (8.17% ± 2.55% [P < 0.05, n = 4]).