先天性耳前瘘管并发耳后乳突部脓肿者较罕见.其特征为瘘管口炎症不明显,而乳突部出现肿胀,故易误诊为乳突炎。现报道2例如下:[例1]患者男性,23岁,因左耳后肿胀疼痛3天,于1980年1月入院.患者于10年前有不明原因的左耳后红肿疼痛,经局部切开引流而愈。5年后该处又有类似发作,近2年来日趋频繁,先后手术竟达17次。检查:左耳耳轮脚根部,耳甲腔上缘近外耳道口之顶部有瘘管口(附图),无分泌物,周围皮肤也不红肿,但有压痛。外耳道及鼓膜皆正常,耳后乳突部肿胀,皮肤有手术疤痕,乳突 X 线片示乳突、鼓窦及鼓室结构清晰,乳突气房发育良好.治 Congenital ear fistula complicated by ear mastoid abscess are rare, characterized by fistula mouth inflammation is not obvious, and mastoid appear swollen, it is easy to misdiagnosed as mastoiditis. Now reported 2 cases are as follows: [Example 1] The patient male, 23 years old, suffering from swelling of the left ear and pain for 3 days, was admitted to hospital in January 1980. The patient had unknown causes of swelling and pain in the left ear 10 years ago, Open drainage and more. 5 years later there is a similar attack in this office, which has become more and more frequent in the past two years. It has operated 17 times in succession. Check: the left ear helix foot, the superior edge of the cavity near the ear canal fistula mouth (top), no secretions, the surrounding skin is not inflamed, but tenderness. External auditory canal and tympanic membrane are normal, swelling of the ear and mastoid Department, the skin with surgical scars, mastoid X-ray showed mastoid, sinus and tympanic drum structure clear, mastoid well developed.