近来文献阐述了一种罕见类型的肺不张,其X 线表现和枝气管癌或胸膜肿瘤相似,称为圆形肺不张或肺不张性假瘤。此种改变常常发生于胸腔积液或胸膜瘢痕之后,要注意和恶性肿瘤鉴别,避免不必要的手术治疗。 Recently, the literature has described a rare type of atelectasis. The X-ray findings are similar to those of bronchial or thoracic tumors. They are called round atelectasis or atelectasis pseudotumors. This change often occurs after pleural effusion or pleural scars, and should pay attention to identify with malignant tumors to avoid unnecessary surgical treatment.