NK-cell lymphoma with nodal presentation and expression of cutaneous lymphocyte-associated antigen.
Nasal and nasal-type NK/T-cell lymphomas are predominantly extranodal tumors with a specific immunophenotype and a strong association with EBV. The cutaneous lymphocyte-associated antigen (CLA) is the homing receptor for skin-homing T cells and NK cells. In the literature, the prognostic impact of CLA expression in primary cutaneous T-cell lymphomas and nasal NK-cell lymphomas is contradictory. We present 2 non-nasal NK-cell lymphomas with nodal presentation. Both tumors showed the phenotype of CD3+ (cytoplasmic), CD5-, CD7-, CD16+, CD56+, cytotoxic molecules+, EBV+ (by in situ hybridization), and CLA+. They were polyclonal for T-cell receptor gamma chain gene rearrangement, indicating an NK cell lineage. The aggressive course in these two patients suggested that in nasal and nasal-type NK-cell lymphomas, CLA expression might be an indicator of poor prognosis. More studies are needed to elucidate the prognostic impact of CLA expression in T cell and NK-cell lymphomas.
Chang
Sheng-Tsung
ST
Department of Pathology, Chi-Mei Medical Center, Tainan 710, Taiwan.
Liao
Yung-Liang
YL
Lin
Shu-Hui
SH
Chuang
Shih-Sung
SS
D000945:Antigens, Differentiation, T-Lymphocyte / Q000096:biosynthesis*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000032:analysis; D020031:Epstein-Barr Virus Infections / Q000150:complications; D017809:Fatal Outcome; D015334:Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor; D006801:Humans; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000378:metabolism / Q000473:pathology*; D008198:Lymph Nodes / Q000473:pathology*; D016399:Lymphoma, T-Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008562:Membrane Glycoproteins / Q000096:biosynthesis*; D008875:Middle Aged; D011379:Prognosis
D000945:Antigens, Differentiation, T-Lymphocyte; D014408:Biomarkers, Tumor; C063419:CTAGE1 protein, human; D008562:Membrane Glycoproteins