title: Plasma cells increased markedly in lymph node in hemophagocytic syndrome: a case report.
abstract: BACKGROUND
  Hemophagocytic syndrome is a rare clinicopathological condition characterized by the activation of the mononuclear phagocyte system, resulting in hemophagocytosis in the reticuloendothelial systems. The pathogenesis of HPS remains unclear.
  
  
  METHODS
  We report the case of a 20-year-old soldier suffering from HPS. Because of long history fever and no reasons being found, his left groin lymph node and left neck lymph node biopsy were done with two weeks interval. We found a marked increase in plasma cells in left neck lymph node during the course of the disease.
  
  
  CONCLUSIONS
  Our result provides a new thought for the researchers to understand the mechanisms responsible for the phagocytosis in HPS.
authors.affiliation: Department of Pathology, People's Liberation Army 152 hospital, Pingdingshan City, Henan province, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Congyang
authors.forename: Hu
authors.initials: H
authors.lastname: Xuexin
authors.forename: Li
authors.initials: L
authors.lastname: Hao
authors.forename: Li
authors.initials: L
authors.lastname: Chunge
authors.forename: Miao
authors.initials: M
authors.lastname: Yingye