AUTHOR=Wang Wenjing , Ma Xin , Zhang Bei , Zhang Zhibo , Wu Xinfeng , Jiang Hongwei , Shi Xiaofei TITLE=Case Report: A refractory unusual tetrad of overlap syndrome involving rheumatoid arthritis, Sjögren’s syndrome, autoimmune hepatitis, and type 1 renal tubular acidosis, successfully treated with a BLyS/APRIL dual inhibitor JOURNAL=Frontiers in Immunology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1558059 DOI=10.3389/fimmu.2025.1558059 ISSN=1664-3224