RANGAP1 and hepatocellular carcinoma: Mechanistically, circ‐RanGAP1, acting as a ceRNA, inhibits miR‐877‐3p, thus making an increased expression of VEGFA. 18EV circRNA‐100,338 is persistently highly expressed in serum of hepatocellular carcinoma (HCC) patients who had the operation of curative hepatectomy may predict lung metastasis and poor survival.19