text_1: 患者 在 2 年前 被 诊断 为 全 血细胞 减少 , 并 在 诊断 后 1 年时 接受 了 全面 检查 ; 血清蛋白 电泳 结果 和 血清 游离 轻链 比值 正常 , 骨髓 活检 标本 未 显示 癌症 证据 .
  
text_2: he had received a diagnosis of pancytopenia 2 years earlier and had undergone an extensive evaluation 1 year after the diagnosis ; results of serum protein electrophoresis and the serum free light @-@ chain ratio had been normal , and examination of a biopsy specimen of the bone marrow had revealed no evidence of cancer .
  