作者分析了200例青年自发性气胸的胸部X线表现,男180、女20例,年龄均小于35岁,以往无明显肺部病变。41/47例属瘦长体型。右侧气胸103例,左侧95例,双侧2例。萎陷程度分为4组。SⅠ_2局部性气胸25例(12.5%),肺萎陷限于肺尖或肺底部,余肺膨胀良好。SⅡ_2外周性气胸37例(18.5%),肺通气情况良好,整个肺外周部份,萎陷至离胸壁2cm外。SⅢ_2斗蓬状气胸59例(29.5%),肺部很少呈肺不张,位于半胸腔的中部和离胸壁2cm处之间。SⅣ_2严重气胸59例(29.5%),肺萎陷显著,通气不良,位于半胸腔内侧,常伴有不同程度的肺不张。其中完全性肺不张 The authors analyzed the chest X-ray findings of 200 young spontaneous pneumothorax, 180 males and 20 females, all under the age of 35 years old, in the past no significant pulmonary lesions. 41/47 cases are elongated body type. Right pneumothorax in 103 cases, left 95 cases, bilateral in 2 cases. Collapse is divided into four groups. SⅠ_2 local pneumothorax in 25 cases (12.5%), pulmonary collapse was limited to the tip of the lung or the bottom of the lungs, more than good lung expansion. 37 cases (18.5%) of peripheral pneumothorax were SII_2. The pulmonary ventilation was good. The peripheral part of the lung collapsed to 2 cm away from the chest wall. SⅢ_2 Cephalopneumothorax in 59 cases (29.5%), pulmonary atelectasis rarely, located in the middle of the hemithorax and 2cm away from the chest wall between. SⅣ_2 severe pneumothorax in 59 cases (29.5%), significant lung collapse, poor ventilation, located in the medial half of the chest, often accompanied by varying degrees of atelectasis. Complete atelectasis