自抗生素问世后,因急性中耳炎并发乳突炎者显著减少。但中耳炎并发乳突炎时的症状被掩蔽,致延误诊断而发生严重颅内并发症者亦屡见不鲜。本文分析9例隐蔽性乳突炎。患者年龄4月～43岁。症状出现至就诊时间为1周～3月。耳镜检查5例鼓膜穿孔,4例正常。乳突相全部呈炎性改变(气房模糊或密度增加)。9例全部有颅内和颞骨并发症:脑膜炎2例,脑脓肿2,硬膜外脓肿2,脑膜炎合并硬膜外脓肿1,大脑 Since the advent of antibiotics, due to acute otitis media with mastoiditis were significantly reduced. However, the symptoms of otitis media complicated with mastoiditis are masked, resulting in delayed diagnosis and serious intracranial complications are not uncommon. This article analyzes 9 cases of concealed mastoiditis. Patients aged 4 months to 43 years old. Symptoms appear to the treatment time is 1 week ~ March. Otoscopy 5 cases of tympanic membrane perforation, 4 cases of normal. Mastoid phase were all inflammatory changes (atrioventricular obstruction or increased density). All 9 had intracranial and temporal bone complications: 2 with meningitis, 2 with brain abscess, 2 with epidural abscess, 2 with meningitis with epidural abscess, 1 with brain