Clinicopathologic and molecular features of 122 Brazilian cases of nodal and extranodal NK/T-cell lymphoma, nasal type, with EBV subtyping analysis

Gabriela Gualco, Pollyanna Domeny-Duarte, Lucimara Chioato, Glen Barber, Yasodha Natkunam, Carlos E. Bacchi

Research output: Contribution to journalArticle

77 Scopus citations

Abstract

Extranodal natural killer/T-cell lymphoma, nasal type (NK/TCL) is more prevalent in Asia and in some areas of South and Central America, but it is rarely seen in the United States and Europe. In this study, a series of 122 cases of NK/TCL from Brazil was analyzed with respect to clinicopathologic features. Clinical characteristics and geographic distribution were evaluated in 97 cases of nasal/nasopharyngeal region and 23 cases in extranasal sites including 6 nodal cases. Clinical staging and follow-up information was available in a subset of 21 patients. All cases harbored Epstein-Barr virus (EBV), 95% and 85% expressed cytoplasmic CD3 and CD56, respectively, and all cases were positive for at least 1 marker for cytotoxic granules. The global distribution of EBV subtypes showed predominance of strain subtype A, 89%, and subtype B, 11%. No dual infections were detected. TCR-γ TCR-gene rearrangement was observed in 7 cases; all of them extranodal. Three of TCR-γ+ cases showed EBV subtype A. Two TCR-γ+/ CD56+ cases showed EBV subtype B. Geographic distribution of NK/TCL showed higher frequency in the southeast and northeast regions of Brazil. Striking differences among geographic regions were seen with the vast majority of EBV subtype B (86%) occurring in the south and southeast regions.

Original languageEnglish (US)
Pages (from-to)1195-1203
Number of pages9
JournalAmerican Journal of Surgical Pathology
Volume35
Issue number8
DOIs
StatePublished - Aug 1 2011

    Fingerprint

Keywords

  • angiocentric lymphoma
  • Brazil
  • cytotoxic granules
  • EBV
  • extranasal T/NK
  • nasal type
  • NK/T cell lymphoma

ASJC Scopus subject areas

  • Anatomy
  • Pathology and Forensic Medicine
  • Surgery

Cite this