From the 11 and 4 cases of synovial sarcoma and leiomyosarcoma, 8 (72.7%) and 4 (100%) tumor samples were evaluated as P-gp-positive sarcomas and 3 (27.27%) and 1 (25%) as MRP-1-positive ones, respectively (Table 1). Here, ABCC1 is linked to leiomyosarcoma.