外耳道良性坏死性骨炎为原因不明的少见疾病,其特点为外耳道深处底部溃疡,其下方的骨质坏死。文中报告一例71岁男性患者,右耳溢液4个月而就诊。轻微耳痛但无眩晕或听力减退,过去无任何类型耳病史,自称常用火柴棒清洁右耳。检查见右外耳道壁轻度发红,底部一大凹陷,鼓膜正常;双耳电测听纯音听阈均在正常范围内;颞骨体层摄片示右外耳道底部形成一大充盈缺损;生化及血清学检查可排除糖尿病和梅毒。在局麻下于右外耳道底部取活检示鳞状上皮并有慢 External ear canal benign necrotizing osteitis is a rare disease of unknown cause, which is characterized by the bottom of the ear canal deep ulcers, the bone below the bone necrosis. The article reported a 71-year-old male patient, right ear discharge for 4 months and treatment. Slight earache without vertigo or hearing loss, no history of any type of ear disease in the past, claiming to use match sticks to clean right ear. Check the right external auditory canal mild redness of the wall, a large depression at the bottom, eardrum normal; binaural audiometry pure tone hearing thresholds are within the normal range; temporal bone body radiography showed the bottom of the right ear canal to form a large filling defect; biochemical and serological tests Can rule out diabetes and syphilis. Under local anesthesia at the bottom of the right external auditory canal to take the test showed that squamous epithelium and slow