成熟的淋巴细胞在数量上明显增加，提示慢性淋巴细胞性白血病，最常在年龄较大的成年人中出现。治疗效果很差，但发展缓慢。
These mature lymphocytes are increased markedly in number. They are indicative of chronic lymphocytic leukemia, a disease most often seen in older adults. This disease responds poorly to treatment, but it is indolent.
