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Stromal plasma cells expressing immunoglobulin G4 subclass in non-small cell lung cancer.

Abstract
Inflammatory cell infiltration in tumor stroma may represent the interaction between the tumor and the immune system. The significance of immunoglobulin (Ig) G4+ plasmacytic infiltration, however, is poorly understood. Here, we analyzed the number of stromal IgG4+ plasma cells and the IgG4/IgG ratio of plasma cells in 294 primary non-small cell lung cancers (NSCLCs) using tissue microarray (TMA) and conventional surgical specimens. In TMA, 35 (12%) cases of NSCLC revealed more than 20 IgG4+ plasma cells per high-power field. In surgical specimens, most (97%) of those IgG4+ plasma cell-enriched cases showed obliterative phlebitis or arteritis, one of the key morphologic features of IgG4-related disease, within or at the periphery of the tumor. Clinically, none of the patients showed symptoms associated with IgG4-related systemic diseases. In patients with stage I squamous cell carcinoma, IgG4-enriched stroma was significantly associated with a favorable prognosis (P = .04). In conclusion, considerable IgG4+ plasma cell infiltration can be seen in a minority of cases of NSCLC and might contribute to prognostic modulation of NSCLC.
AuthorsMasakazu Fujimoto, Akihiko Yoshizawa, Shinji Sumiyoshi, Makoto Sonobe, Masashi Kobayashi, Itsuko Koyanagi, Wulamujiang Aini, Tatsuaki Tsuruyama, Hiroshi Date, Hironori Haga
JournalHuman pathology (Hum Pathol) Vol. 44 Issue 8 Pg. 1569-76 (Aug 2013) ISSN: 1532-8392 [Electronic] United States
PMID23465276 (Publication Type: Journal Article)
CopyrightCopyright © 2013 Elsevier Inc. All rights reserved.
Chemical References
  • Immunoglobulin G
Topics
  • Adult
  • Aged
  • Aged, 80 and over
  • Carcinoma, Non-Small-Cell Lung (immunology, pathology)
  • Female
  • Humans
  • Immunoglobulin G (immunology)
  • Immunohistochemistry
  • Kaplan-Meier Estimate
  • Lung Neoplasms (immunology, pathology)
  • Male
  • Middle Aged
  • Plasma Cells (immunology, pathology)
  • Prognosis
  • Stromal Cells (immunology, pathology)
  • Tissue Array Analysis
  • Young Adult

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