Open AccessExtranodal Nasal NK/T-Cell Lymphoma: A Rare Oral Presentation and FASN, CD44 and GLUT-1 Expression
Author(s) -
Hélder Antônio Rebelo Pontes,
Flávia Sirotheau Corrêa Pontes,
Brunno Santos de Freitas Silva,
Felipe Paiva Fonseca,
Bruno Augusto Benevenuto de Andrade,
Víctor Hugo Toral-Rizo,
Mário José Romañach,
Jorge Esquiche León,
Oslei Paes de Almeida
Publication year - 2013
Publication title -
brazilian dental journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.616
H-Index - 50
eISSN - 1806-4760
pISSN - 0103-6440
DOI - 10.1590/0103-6440201302202
Subject(s) - pathology , t cell lymphoma , lymphoma , nasal cavity , medicine , cancer research , biology , surgery
Extranodal natural killer (NK)/T-cell lymphoma is an aggressive malignant tumor with distinctive clinicopathological features, characterized by vascular invasion and destruction, prominent necrosis, cytotoxic lymphocyte phenotype and a strong association with Epstein-Barr virus. Here is reported an extranodal nasal NK/T-cell lymphoma case, involving the maxillary sinus, floor of the orbit, and interestingly extending to the oral cavity through the alveolar bone and buccal mucosa, preserving the palate, leading to a primary misdiagnosis of aggressive periodontal disease. Moreover, this work investigated for the first time the immunohistochemical expression of fatty acid synthase (FASN) and glucose transporter 1 (GLUT-1) proteins in this neoplasia. FASN showed strong cytoplasmatic expression in the neoplastic cells, whereas GLUT-1 and CD44 were negative. These findings suggest that the expression of FASN and the loss of CD44 might be involved in the pathogenesis of the extranodal nasal NK/T-cell lymphoma, and that GLUT-1 may not participate in the survival adaptation of the tumor cells to the hypoxic environment. Further studies with larger series are required to confirm these initial results.