Our results showing granulysin expression in a small proportion of other lymphomas with cytotoxic phenotypes, i.e. ALK-negative ALCL, EATL and PTCL NOS support previous observations of granulysin positivity in systemic ALCL of childhood, in mycosis fungoides (MF) and Sézary syndrome [21, 22]. This evidence concerns the gene ALK and mature T-cell and NK-cell non-Hodgkin lymphoma.