NCAM1 and cancer: Moreover, the percentage of intratumoral infiltration by CD56+ cells was significantly higher in galectin-9high tissues than in galectin-9low tissues (as the numbers of CD56+ cells in cancer nests and para-tumoral tissues, median 7.6 vs. 0; range 0–42.4 vs. 0–0.8; P<0.0001) (Fig 3B and 3C).