TLR9 and primary cutaneous T-cell non-Hodgkin lymphoma: The TLR2, TLR4, and TLR9 expression on keratinocytes express in inflamed skin of patients with CTCL, including both Mycosis fungoides (MF) and Sezary syndrome (SS, an aggressive form of CTCL) (Jarrousse et al., 2006[78]).