A woman in her mid-60s, who was in remission following successful combination chemotherapy for Burkitt lymphoma 8 years previously, presented with dyspnea, fatigue, general malaise, and presyncope. On examination, she was normotensive, afebrile, and clinically euvolemic. Laboratory testing showed a hemoglobin level of 12.1 g/dL (to convert to grams per liter, multiply by 10), white blood cell count of 9900/µL (to convert to ×10⁹ per liter, multiply by 0.001), erythrocyte sedimentation rate of 76 mm/h, lactate dehydrogenase level of 139 U/L (to convert to microkatals per liter, multiply by 0.0167), and normal coagulation profile. Serum immunoglobulin quantitation showed normal immunoglobulin (Ig) G, IgA, and IgM levels of 1590 mg/L, 303 mg/L, and 94 mg/L, respectively (to convert to grams per liter, multiply by 0.01). Blood culture findings were negative.

一名 60 多岁的女性在 8 年前成功接受伯基特淋巴瘤联合化疗后病情缓解，出现呼吸困难、疲劳、全身不适和晕厥前兆。检查时，她血压正常，无发热，临床上血容量正常。实验室检测显示血红蛋白水平为 12.1 g/dL（转换为克/升，乘以 10），白细胞计数为 9900/µL（转换为 ×10 ⁹每升，乘以 0.001），红细胞沉降率为 76 mm/h，乳酸脱氢酶水平为 139 U/L（转换为每升微量钾，乘以 0.0167）和正常的凝血曲线。血清免疫球蛋白定量显示正常的免疫球蛋白 (Ig) G、IgA 和 IgM 水平分别为 1590 mg/L、303 mg/L 和 94 mg/L（转换为克/升，乘以 0.01）。血培养结果为阴性。