外耳道异物是临床上较为常见的一种疾病 ,常因病史明确 ,且患者多能及时来就诊故易早期诊断、早期治疗。但临床上亦有一部分患者不能提供确切病史 ,就诊不及时 ,易误诊。以下报道一例外耳道异物误诊为外耳道骨瘤。患者 ,男 ,17岁 ,自感左耳听力下降一年余 ,无耳鸣、耳痛 ,无明 External auditory canal foreign body is a more common clinical disease, often due to a clear history, and patients with more timely diagnosis and treatment is easy to early diagnosis and early treatment. However, some patients also do not provide the exact clinical history, treatment is not timely, easily misdiagnosed. The following report of an external auditory canal foreign body misdiagnosed as external auditory canal osteoma. Patient, male, 17 years old, self-inductance left ear hearing loss more than a year, no tinnitus, earache, ignorant