法洛四联征心影改变呈() ["A．梨形心","B．主动脉型心","C．横位心","D．滴状心","E．靴形心"]
肺源性心脏病心影呈() ["A．滴状心","B．横位心","C．靴形心","D．梨形心","E．主动脉型心"]
特发性血小板减少性紫癜(idiopathicthrombocytopenicpurpuraITP)
高血压心脏病心影呈() ["A．主动脉型心","B．靴形心","C．梨形心","D．滴状心","E．横位心"]
男性，50岁。有动脉粥样硬化病史。突然感到剧烈刀割样胸痛2小时，向背部放射。查体发现主动脉瓣区可闻及舒张期杂音。考虑为主动脉夹层可能。下列哪一项是其常见的胸片表现() ["A．主动脉弓部和降主动脉上部影增宽","B．主动脉影狭小","C．主动脉影外形不规则","D．主动脉影位置改变","E．主动脉搏动增强"]
骨髓外造血(extramedullaryhemopoiesis)
