The circ_0026782, circ_0001946, circ_0004826, circ_0077837, circ_0030586, circ_0008039, circ_0001346, and circ_0003141 are spliced from ITGA7, CDR1, UTRN, EPB41L2, ABCC4, PRKAR1B, RNF13, and UBAP2, which all play an important effect in tumor proliferation, migration, and metastasis. Here, ABCC4 is linked to neoplasm.