STAT3 and benign neoplasm: In our experiments, the inhibitory effect of CYLD on the nuclear accumulation of phosphorylated STAT3 resembles CYLD-Bcl3 interaction, since CYLD also deubiquitinates Bcl-3 in perinuclear regions and prevents its translocation to the nucleus, a process which significantly contributes to the development of keratinocyte hyperproliferation and development of benign tumors of the skin appendage called cylindromatosis [23].