We reported 4 cases with rare diffuse serous labyrinthitis who were from 1 112 patients with dangerous otitis media in recent 20 years.

• 报告因骨疡型及胆脂瘤型中耳炎而行乳突根治术的1112例中并发弥漫性浆液性迷路炎4例，发生率为0.；36%25，听力损失严重。