These chemokines are indeed expressed by macrophages and DCs in CTCL skin lesions and the levels of CCL18 correlate with those of IL-4 (Gunther et al., 2011; Miyagaki et al., 2013; Tanita et al., 2019; Vieyra-Garcia et al., 2019). Here, IL4 is linked to primary cutaneous T-cell non-Hodgkin lymphoma.