患者男，20岁。活动中突发胸骨角区疼痛、隆起1小时。患者在双杠上做徒手倒立动作，当躯体下落前挺时，忽听胸骨上1／3处有响声，并立即感到该处疼痛，无气短、咳嗽、咯血等。体检：胸廓对称，胸骨角处见明显骨性隆起，压之疼痛，有轻微骨擦感，表皮无外伤痕迹，心肺听诊无异常 Patient male, 20 years old. Sudden chest angular pain activities, uplift 1 hour. Patients in the parallel bars to do handstand action, when the body before the fall, suddenly heard the sternum on the 1/3 of the noise, and immediately felt the pain, no shortness of breath, cough, hemoptysis and so on. Physical examination: symmetrical thorax, stenosis at the chest bone see obvious bone uplift, pressure pain, a slight sense of bone rubbing, no trace of traumatic epidermis, cardiopulmonary auscultation no abnormalities