对10例没有肉眼肿瘤证据的老年尸体进行观察。应用“清除”技术整块获取胸导管起始部位附近的淋巴结标本,共115枚。对该群淋巴结进行组织学检查,结果表明,这些淋巴结的输入侧及输出侧常常不能清楚辨别,原因包括:1由于缺乏典型的“门”结构,浅层皮质(B淋巴细胞区域)和深层皮质(T淋巴细胞区域)无法清晰界定,并且两种皮质混杂在一起构成“淋巴结团”;2每一枚淋巴结均含有一系列巨噬细胞,这些巨噬细胞被扩张的中间及被膜下淋巴窦包绕;3这些淋巴 Ten elderly cadavers with no evidence of gross tumor were observed. A total of 115 lymph node specimens near the beginning of the thoracic duct were obtained using the “clear” technique. Histological examination of this group of lymph nodes showed that the input side and the output side of these lymph nodes were often not clearly discerned due to the lack of a typical “gate” structure in the superficial cortex (B lymphocyte region) and Deep cortex (T lymphocyte area) can not be clearly defined, and the two cortex mixed together to form a “lymph node mass.” 2 Each lymph node contains a series of macrophages, these macrophages are dilated in the middle and capsule Under the lymphatic sinus wrap; 3 these lymphatic