TCRδ expression was found in 17 of the 20 patients; two of the remaining three cases were positive for TCRγ but not for TCRδ, and one had a TCR-silent phenotype that had changed during tumour progression from a previous MF-like phase characterised by CD8+ alpha/beta cells mixed with a small population of CD45RA+TCRδ+ cells in the epidermis. Here, CD8A is linked to neoplasm.