Results 12 cases were treated by operation and 1 case was treated conservatively.
结果12例患者手术切除肿瘤，1例行保守治疗。
Results Among 12 cases, 5 cases were treated conservatively and 7 cases were subjected to operation treatments, all cases were cured.
结果12例病例中5例采用保守治疗，7例采用手术治疗，全部病例均治愈。
Survival analyses were used for comparisons between patients with ra and the normal population, and between the operated and those treated conservatively.
存活率分析被用于类风湿性关节炎患者和正常人群之间，以及手术患者和那些保守治疗患者之间的比较。
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