Histological Features of Delayed Foreign Body Granuloma With Epithelioid Histiocyte Aggregation and Eosinophilic Reaction due to Hyaluronic Acid Injection

Abstract

Conclusion: We have reported a case of delayed foreign body granuloma with eosinophilic and histiocytic infiltration following injection of HA. It was suggested that the marked eosinophilic infiltration around macrophages was due to not only an allergic reaction, but also in part to increased macrophage aggregation.