GACAT2 and renal cell carcinoma: Levels of circulating lncRNAs GIHCG and ARSR significantly dropped after resection of RCC tumors, while plasma levels of H19, A174084 and GACAT2 markedly decreased in GC patients postoperatively, further supporting a direct correlation between abnormal levels of circulating lncRNAs and tumorigenesis29,32,34,35,37,38.