Such profiles, which are usually observed during intrathymic T cell development,1, 27 had previously been reported in isolated PTCL cases46, 47 and a proportion of cutaneous T cell tumours.27, 48 Furthermore, CD10 expression was detected in only 39% of AITL, even when adopting a low cut-off value.27 Such rates did not vary between tissue microarrays and conventional sections. This evidence concerns the gene MME and angioimmunoblastic T-cell lymphoma.