“…1 After an extensive literature review on otological IgG4-RD, we found 23 reported cases. 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 According to these case studies, otalgia, worsening hearing loss, tinnitus, and vertigo constitutes otologic manifestations. Acute recurrent mastoiditis, 7 serous otitis media, 12 otorrhea, 10 and facial weakness 11 are the main clinical presentations.…”