With the development of whole genome and transcrip- tome sequencing technologies, a growing body of long noncoding RNAs (IncRNAs) and circular RNAs (circRNAs) has been i-dentified and is receiving increasing attention. LncRNAs and circRNAs are non-protein encoding transcripts whose functions are crucial for advancing our comprehensive understanding of biological processes in human health and diseases, specifically tumor. And there is a close relationship between circRNAs and IncRNAs in their origin and function. In this paper, we have reviewed ...