AUTHOR=Kim Yukang , Woo Tonghoon , Lee Sun-Uk , Park Euyhyun , Shin Hyun-Jin , Sim Jongmin , Kim Gerard Jounghyun , Kim Ji-Soo TITLE=Optic neuropathy as an early manifestation of granulomatosis with polyangiitis: a case report and literature review JOURNAL=Frontiers in Medicine VOLUME=Volume 12 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2025.1515622 DOI=10.3389/fmed.2025.1515622 ISSN=2296-858X