鉴于粉尘吸入和分布的相对均匀,以及肺脏生理功能、解剖结构等,矽肺进展具有典型的渐进性和双侧对称性的特点。据此,典型矽肺融合灶,好发于两肺上部外带,呈双翼状,其长轴与胸壁之长轴一致,块影渐渐收缩,同时向肺门移位靠拢,诊断并不困难。但在实际工作中,通过临床X线胸片动态观察,有些Ⅲ期矽肺融合块影之出现,完全违反上述规律,称矽肺非典型融合。至今国内报导不多,笔者收集4例,报导并进行讨论于后,供同道工作中参考。例1.男性,57岁,X线片号023,铁矿井下打眼工18年。胸片所示:双肺门增大,密度增高且不均匀,双肺纹理紊乱,呈网状改变,两肺中下肺野有暗淡不典型小结节影,左上肺显示大片致密昏暗影,由肺门指向外上方,边缘部分可见,纵膈稍左 In view of the relative uniformity of inhalation and distribution of dust, as well as physiological functions of the lungs, anatomical structures, the progression of silicosis is typically gradual and bilaterally symmetrical. Accordingly, a typical silicosis fusion occurs predominantly in the upper part of both lungs and takes the form of wings. Its long axis coincides with the long axis of the chest wall, while the shadow gradually shrinks. At the same time, it moves closer to the hilar and the diagnosis is not difficult. However, in actual work, some clinical stage X-ray findings of X-ray showed that the clinical manifestations of X-ray showed that X-ray fusion of atypical silicosis was completely violated. So far there are not many domestic reports, the author collected 4 cases, reported and discussed later, for reference for fellow work. Example 1. Male, 57 years old, X-ray film number 023, 18 years of underground mine drilling. Chest X-ray showed: double hilar enlargement, increased density and uneven, double lung texture disorders, reticular changes in both lungs in the lung field has dim atypical small nodules, the left lung shows large dense dark shadow, Point outward from the hilar, the edge of the visible, slightly left mediastinum