RRC ID 37606
Author Kato N, Kurotaki H, Uchigasaki S, Fukase M, Kurose A.
Title Ovarian clear cell carcinoma with plasma cell-rich inflammatory stroma: a clear cell carcinoma subgroup with distinct clinicopathological features.
Journal Histopathology
Abstract AIMS:Ovarian clear cell carcinoma has a unique stroma. Although a hyalinized or mucoid stroma is more common, the stroma sometimes shows a dense inflammatory infiltrate, simulating a dysgerminoma. The aim of this study was to analyse the character and significance of the inflammatory stroma.
METHODS AND RESULTS:Twelve of 60 (20%) clear cell carcinomas showed an inflammatory stroma. The inflammatory stroma and hyalinized/mucoid stroma were mutually exclusive. Inflammatory cells were predominantly composed of CD138-positive plasma cells. As compared with the non-inflammatory cases, the epithelial component frequently showed a solid growth pattern and immunoreactivity for cyclooxygenase-2, one of the critical proinflammatory enzymes (P < 0.005). These findings were repeated after heterotransplantation of three clear cell carcinoma cell lines into athymic nude mice. In particular, xenografts of one cell line (JHOC-5) were infiltrated by mature plasma cells, indicating that plasma cell differentiation was stimulated by JHOC-5 cells, independently of T lymphocytes. Clinicopathologically, the frequency of International Federation of Gynaecology and Obstetrics stage III was higher in the cases with an inflammatory stroma than in those without it (P < 0.01).
CONCLUSIONS:Clear cell carcinomas with an inflammatory stroma constitute a distinct clinicopathological subgroup. It is strongly suggested that tumour cells themselves are responsible for inducing inflammation and stimulating plasma cell differentiation in a paracrine manner.
Volume 68(4)
Pages 588-95
Published 2016-3
DOI 10.1111/his.12783
PMID 26211695
MeSH Adenocarcinoma, Clear Cell / pathology* Animals Female Heterografts Humans Immunohistochemistry Inflammation / pathology* Mice Mice, Nude Ovarian Neoplasms / pathology* Plasma Cells / pathology*
IF 3.294
Times Cited 1
Human and Animal Cells