作者报告1例77岁的高加索妇女,有明显的周期性全血细胞减少症,周期长达100天,持续4年后逐渐改善。病人因贫血入院,血象示全血细胞减少,血红蛋白8.7g/dl,白细胞1.4×10~9/l,中性粒细胞0.5×10~9/l,血小板114×10~9/l。骨髓增生正常,幼红细胞相对增加,髓系左移且稀少,无MDS征象,无染色体异常。观察了2825天的血液值变化,各细胞系列有1200～1400天是波动的,其后周期缩短, The authors report a case of a 77-year-old Caucasian woman who developed a marked periodic pancytopenia for up to 100 days and gradually improved after 4 years. Patients admitted to hospital due to anemia, blood showed complete pancytopenia, hemoglobin 8.7g / dl, white blood cells 1.4 × 10 ~ 9 / l, neutrophils 0.5 × 10 ~ 9 / l, platelets 114 × 10 ~ 9 / l. Normal myeloproliferation, relative increase in erythroblasts, myeloid left and sparse, no signs of MDS, no chromosomal abnormalities. Observed 2825 days of blood changes, each cell series has a fluctuation of 1200 to 1400 days, followed by shortening of the cycle,