Yelyzaveta Yehudina et al. 2022. A clinical case of eosinophilic granulomatosis with polyangiitis manifestation with a tumor in the pericardium in combination with high titers of serum immunoglobulin G4. Archives of Rheumatology. 37, 1 (Mar. 2022), 142–144. DOI:https://doi.org/10.46497/ArchRheumatol.2022.8767.