title: First reported cases of intravascular large cell lymphoma of the NK cell type: clinical, histologic, immunophenotypic, and molecular features.
abstract: Most cases of intravascular large cell lymphoma are of B-cell phenotype, with a few cases of T-cell lineage and rare cases with histiocytic features described. A definitive natural killer (NK) cell variant has not been recognized. This report is the first to describe the clinical, histologic, immunophenotypic, and molecular features of 2 cases of intravascular lymphoma with an NK cell phenotype (CD3epsilon+, CD2+, CD7+, CD56+, T-cell intracytoplasmic antigen-1+, perforin+, granzyme B+, CD20-, CD4-, CD5-, CD8-, T-cell receptor [TCR]betaF1-). Molecular studies for TCR gene rearrangements revealed a germline configuration. A 41-year-old man had erythematous plaque-like subcutaneous lesions of the lower extremities in which biopsy revealed Epstein-Barr virus-positive intravascular lymphoma. Following chemotherapy and stem cell transplantation, he was alive with no evidence of disease at 1 year. A 47-year-old woman had myalgias, arthralgias, weakness, fever, altered mental status, and pancytopenia. Bone marrow biopsy demonstrated intravascular lymphoma. Therapy was initiated; however, her condition deteriorated rapidly, and she died. Autopsy revealed involvement of multiple organs, including brain, kidneys, ovaries, and bone marrow. These cases represent the first documented examples of an NK cell variant of intravascular lymphoma.
authors.affiliation: Department of Pathology, Brigham and Women's, Hospital and Harvard Medical School, Boston, MA 02115, USA.
authors.forename: Huiqing
authors.initials: H
authors.lastname: Wu
authors.forename: Jonathan W
authors.initials: JW
authors.lastname: Said
authors.forename: Elizabeth D
authors.initials: ED
authors.lastname: Ames
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Valerie
authors.initials: V
authors.lastname: McWhorter
authors.forename: Peter
authors.initials: P
authors.lastname: Chen
authors.forename: Violette
authors.initials: V
authors.lastname: Ghali
authors.forename: Geraldine S
authors.initials: GS
authors.lastname: Pinkus
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000032:analysis; D001921:Brain / Q000098:blood supply / Q000473:pathology; D005260:Female; D015321:Gene Rearrangement; D019672:Genes, T-Cell Receptor; D006801:Humans; D007150:Immunohistochemistry; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000378:metabolism* / Q000473:pathology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012867:Skin / Q000098:blood supply / Q000473:pathology
chemical_list: D015703:Antigens, CD