应用负染、超薄切片及扫描电镜样品制备三种方法,进行电镜观察:在跟腱炎病例中腱束内均可见炎症变质、渗出、增生等病变,以渗出和小灶性出血居多;在跟腱断裂病例中也可见炎症改变,但以小片状断裂和增生病变为突出。电镜观察表明:跟腱炎是产生跟腱断裂的内在原因。 Three methods of negative staining, ultrathin section and scanning electron microscopy were used for electron microscopic observation. In the cases of Achilles tendinitis, inflammatory degeneration, exudation, hyperplasia and other pathological changes were seen in the tendon bundles. Inflammatory changes were also seen in cases of Achilles tendon rupture, but were highlighted with small breaks and hyperplastic lesions. Electron microscopy showed that: Achilles tendinitis is the inherent cause of rupture of Achilles tendon.