caudal mediastinal node下纵隔结节 cerous magnesium nitrate硝酸铈镁 congenital melanocytic nevi先天性黑素细胞痣 cystic medial necrosis(of aorta)(主动脉)囊性中层坏死 congenital mesoblastic nephroma先天性中胚层肾瘤 corynebacterium,mycobacterium,nocardia棒状杆菌,分支杆菌和诺卡(氏)菌