Abstract:
AIMS:The clinicopathological distinctiveness of nodal cytotoxic molecule (CM)-positive Epstein-Barr virus (EBV)-associated peripheral T cell lymphoma (PTCL) remains to be clarified. We investigated 26 patients with this lymphoma compared to nodal CM(+) EBV(-) PTCL (n = 39) and extranasal natural killer/T cell lymphoma of nasal type (ENKTL, n = 44). METHODS AND RESULTS:Nodal CM(+) EBV(+) PTCL patients were more likely to have B symptoms (P = 0.019) and hepatic involvement (P = 0.026) than nodal CM(+) EBV(-) PTCL patients. The former also had more Stage III/IV disease (P = 0.025) but much less cutaneous involvement (P < 0.001) than ENKTL patients at diagnosis. This nodal EBV(+) lymphoma possessed a distinctive immunophenotype of high CD8(+), CD56(-) pattern with an aggressive clinical course (median, 6.6 months). Thrombocytopenia was present in 11 (50%) patients and found to be the strongest prognostic indicator (P = 0.001) in this nodal EBV(+) group. For all nodal CM(+) PTCL cases CD5 negativity, but not EBV positivity, was the significant adverse prognostic factor (P < 0.002) in a multivariate analysis, independent of prognostic index for PTCL (PIT) or International Prognostic Index (IPI) scores. CONCLUSIONS:Nodal CM(+) EBV(+) PTCL constitutes a unique group of lymphomas distinct from ENKTL. The data provide support for our assertion that nodal CM(+) PTCL should be distinguished in the 2008 WHO category of PTCL, not otherwise specified.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Kato S,Takahashi E,Asano N,Tanaka T,Megahed N,Kinoshita T,Nakamura Sdoi
10.1111/j.1365-2559.2012.04199.xsubject
Has Abstractpub_date
2012-08-01 00:00:00pages
186-99issue
2eissn
0309-0167issn
1365-2559journal_volume
61pub_type
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