Evaluation of IgG4+ Plasma Cell Infiltration in Patients with Systemic Plasmacytosis and Other Plasma Cell-infiltrating Skin Diseases
DOI:
https://doi.org/10.2340/00015555-2909Keywords:
systemic plasmacytosis, IgG4-related disease, plasma cell, IgG4Abstract
Systemic plasmacytosis is a rare skin disorder characterized by marked infiltration of plasma cells in the dermis. IgG4-related disease is pathologically characterized by lymphoplasmacytic infiltration rich in IgG4+ plasma cells, storiform fibrosis, and obliterative phlebitis, accompanied by elevated levels of serum IgG4. Reports of cases of systemic plasmacytosis with abundant infiltration of IgG4+ plasma cells has led to discussion about the relationship between systemic plasmacytosis and IgG4-related disease. This study examined IgG4+/IgG+ plasma cell ratios in 4 patients with systemic plasmacytosis and 12 patients with other skin diseases that show marked infiltration of plasma cells. Furthermore, we examined whether these cases met one of the pathological diagnostic criteria for IgG4-related disease (i.e. IgG4+/IgG plasma cells ratio of over 40%). Only one out of 4 patients with systemic plasmacytosis met the criterion. These results suggest that systemic plasmacytosis and IgG4-related disease are distinct diseases.Downloads
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Copyright (c) 2018 Shintaro Takeoka, Masahiro Kamata, Carren Sy Hau, Mihoko Tateishi, Saki Fukaya, Kotaro Hayashi, Atsuko Fukuyasu, Takamitsu Tanaka, Takeko Ishikawa, Takamitsu Ohnishi, Yuko Sasajima, Shinichi Watanabe, Yayoi Tada
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