参照美国胸科协会的纵隔淋巴结分区法,在38具正常成人尸体上观察了纵隔各区淋巴结的数目、形态以及各区最大淋巴结的大小和方位。各区淋巴结的数目不等,形态各异,以1～3个椭圆形淋巴结常见。测量了各区最大淋巴结的长、宽、厚径。各区淋巴结大小不等,其中7区最大,5区次之。经统计学分析确定了正常纵隔各区淋巴结各径的最大值标准。讨论了淋巴结不同方位对 CT 横扫时淋巴结大小测量的影响。 With reference to the American Thoracic Society’s mediastinal lymph node zoning method, the number and shape of lymph nodes and the size and orientation of the largest lymph nodes in each region were observed on 38 normal adult cadavers. The number of lymph nodes in different regions, different shapes, with 1 to 3 oval lymph nodes common. The maximum lymph node length, width and thickness were measured in each area. The size of lymph nodes in different regions, of which the largest area 7, followed by 5 areas. After statistical analysis to determine the normal mediastinal lymph node size of the maximum standard. The effects of lymph node orientation on the size of lymph nodes during CT scan were discussed.