近年来国内外均有用B型超声探查纵隔肿瘤的报告。最近我们用东芝SAL—22A型B超诊断仪探查1例前纵隔畸胎瘤发生定位错误,报告如下。病例:女,20岁。因发热,咳嗽、咯痰2个月入院。查体:体温34.5℃,右胸下部语颤减弱,叩浊,呼吸音减弱。X线胸片: In recent years, B-mode ultrasound has been used to detect mediastinal tumors at home and abroad. Recently, we used the Toshiba SAL-22A B ultrasound diagnostic apparatus to detect the location error of an anterior mediastinal teratoma. The report is as follows. Case: Female, 20 years old. Fever, cough, expectoration were admitted to the hospital for 2 months. Physical examination: At a temperature of 34.5°C, the hypothalamus in the lower right chest was weakened, cloudy, and the breath sounds were weakened. X-ray: