NCAM1 and lymphoma: Variously referred to as polymorphic reticulosis, lethal midline granuloma, and angiocentric T-cell lymphoma [2, 3], most of these lymphomas show features typical of NK-cells, being negative for surface CD3; positive for cytoplasmic CD3 epsilon (ε), CD56, and cytotoxic molecules (perforin, granzyme B, or TIA1); with T-cell receptor (TCR) gene in germline configuration [4, 5].