DNM1L and hepatocellular carcinoma: To further investigate the relationship between mitochondrial fission and TAM infiltration, the expression of Drp1 and CD163 (a marker of TAMs) was indirectly examined in 69 paired tumor and peritumor tissues from HCC patients using immunohistochemistry (IHC) and the percentage of CD163-positive cells was counted (Fig. 1a).