Méhul et al. demonstrated distinct lesional proteomic profiles between psoriasis and cutaneous T-cell lymphoma (CTCL) [272]: psoriasis lesions exhibited differential expression of IL36G and IL37 in contrast to healthy skin, whereas CTCL lesions did not; conversely, CCL27 was differentially expressed in CTCL when compared to healthy skin, with no variations observed in psoriasis lesions. Here, CCL27 is linked to primary cutaneous T-cell non-Hodgkin lymphoma.