ABCG2 and neoplasm: When the ABCG2 and OCT-4 expression status was compared with the clinicopathological variables, there were no correlations with age (p=0.994 vs. p=0.313), gender (p=0.104 vs. p=0.083), tumor size (p=0.073 vs. p=0.491), or tumor shape (p=0.485 vs. p=0.201).