患者男 ,9岁。因间歇性咳嗽 1周来院就诊。查体 :一般情况尚可 ,双肺呼吸音粗糙 ,全身浅表淋巴结未触及。其他部位无异常。实验室常规检查无阳性发现。胸部Ｘ线示 :纵隔有一卵圆形肿块影 ,约 9ｃｍ× 5ｃｍ× 5ｃｍ ,界限不清 ,密度不均 ,分叶不明显。临床诊断 :纵隔肿瘤性质待 Male patient, 9 years old. Intermittent coughing came to the hospital for one week. Physical examination: The general condition is acceptable. The breath sounds of the lungs are rough and the superficial lymph nodes are not touched. No abnormality in other parts. No positive findings were found in routine laboratory tests. The chest X-ray showed that there was an oval mass around the mediastinum, about 9cm x 5cm x 5cm, with unclear boundaries, uneven density, and indistinct lobes. Clinical diagnosis: nature of mediastinal tumors