Immunohistochemical staining of MICA/B in HCC patients with different clinical stages. (A) Representative immune-histochemical staining of the expression of MICA/B in HCC tissues. a, normal liver tissue; b, TNM stage I tumor tissue; c, TNM stage II tumor tissue; d, TNM stage III tumor tissue; e, TNM stage IV tumor tissue. (B) Immune-histochemical scores of MICA/B in HCC tissues of different stages. Data were presented as means ± S.D., *P < 0.05, **P < 0.01.