Among the 438 CTD patients,12 had positive Ku Ab,and among the 15 systemic sclerosis polymyositis (SSc PM) overlap syndrome,9 had positive Ku Ab.

• 438份CTD患者血清中 12例Ku抗体阳性 ,其中系统性硬化症多发性肌炎重叠结缔组织病 (SSc PM )占 9例。