ABCC12 and skin basal cell carcinoma: The functional relevance of our observation of approximately 8.7 fold greater levels of mrp9 [expression values 21.12 vs. 184.71] in BCC compared to normal skin has yet to be determined; its presence is unlikely to be involvement in drug resistance, as all of the BCCs included in this study were chemotherapy-naive (indeed, except in a limited number of advanced cases of BCC, chemotherapy is not used as a therapy for this disease.