发生于乳突的囊肿极为罕见,回顾近15年的国内外文献报道,仅在国内文献上查到2例.我科于1998年收治1例乳突囊肿,报道如下.1 临床质料患者男,20岁,农民.发现右耳内长肿物4年.4年前掏耳时发现右耳内长一小肿物,位于外耳道后壁上,靠近外耳道口,约黄豆大小.因无任何不适及听力障碍,未曾就医.后 Occurred in the mastoid cyst is extremely rare, reviewed nearly 15 years of domestic and foreign literature, only found in the domestic literature in 2 cases .I Division 1 cases of papillary cysts were admitted in 1998, reported as follows.1 Clinical material patients male, 20 years old, farmer found the right ear within the long tumor 4 years 4 years ago when the ear was found in the right ear long a small tumor located in the posterior wall of the external auditory meatus, near the external auditory canal, soybeans about the size due to no discomfort and Hearing impaired, never sought medical treatment