How to deal with mirdeep2 output "miRBase miRNAs not detected by miRDeep2"

Question

[otieno43]

Hi guys, I have successfully ran mirdeep2 and I have gotten three sets of results including: novel, known mature and miRBase miRNAs not detected by miRDeep2. I understand that the third group (miRBase miRNAs not detected by miRDeep2) may be miRNA with different structures from what mirdeep2 uses to predict microRNAs. I was wondering how to deal with this third group.....any suggestion please.

Thanks.