57名氯乙烯作业工人,工龄2—35年,指骨 X 线片,有2例指骨端呈半月形骨缺损,边缘密度增高;3例末节指骨骨皮质呈不同程度增厚,骨髓腔变小,有的完全闭塞。此5例中,3例为清釜工,1例为电器仪表工,1例为聚合工工龄分别为15,30,8,8,12年,2年后复查一次,X 线 57 vinyl chloride workers, 2 to 35 years of service, phalanx X-ray films, 2 cases of phalangeal showed half-moon bone defects, marginal density increased; 3 cases of phalanx distal phalanx showed varying degrees of thickening, marrow cavity smaller, Some completely blocked. Among these 5 cases, 3 were clear kettle workers, 1 was electrical instrument workers, and 1 was a polymer worker. The length of service was 15, 30, 8, 8, and 12 years, respectively. Two years later, X-ray