Hsa_circ_0004771, hsa_circ_0005991, and hsa_circ_0060927 are spliced by nuclear receptor interacting protein 1 (NRIP1), amyloid beta precursor protein binding family B member 2 (APBB2), and cytochrome P450 family 24 subfamily A member 1 (CYP24A1), respectively, which play essential roles in tumor proliferation, migration, and apoptosis. This evidence concerns the gene CYP24A1 and neoplasm.