ABCB1 and cancer: Also there were no dependences between the expression of ABCB1 gene cancer altered tissue and clinical-pathological features: tobacco smoking (p = 0.0627), histological type (p = 0.6137), grade of histological malignancy (p = 0.1223), the involvement of local lymph nodes (p = 0.1446), gender (p = 0.7797) and age (R = −0.014).