Further upstream circRNAs of the 5 miRNAs were predicted, 4 of which were involved in circRNA-mediated ceRNA regulation, and 60 potentially regulatory circRNAs were identified (Figure 8C; Supplementary Table S7), which meant that FN1 was very likely regulated by multiple circRNA-mediated ceRNA mechanisms, thus affecting the progression of NPC. Here, FN1 is linked to nasopharyngeal carcinoma.