D'Cruz I A, Chiemmongkoltip P
Clin Cardiol. 1982 Aug;5(8):464-7. doi: 10.1002/clc.4960050811.
X-ray chest and CAT scan suggested an anterior mediastinal mass in a girl who had prominent left parasternal pulsations. M-mode and two dimensional echocardiography demonstrated an extracardiac fairly rigid cystic mass between right ventricle and chest wall, which proved to be a cystic chondroma arising from the fourth left costal cartilage.
胸部X光和计算机断层扫描显示，一名左胸骨旁搏动明显的女孩前纵隔有一个肿块。M型和二维超声心动图显示右心室和胸壁之间有一个心外相当坚硬的囊性肿块，结果证实是一个起源于左第四肋软骨的囊性软骨瘤。
