白血病可见白细胞是淋巴细胞，但它们是母细胞--核中含有核仁的、更大的、非常不成熟的细胞。这样的淋巴细胞提示急性淋巴母细胞性白血病（ALL）的存在。ALL在儿童中比成年人常见。
儿童中的ALL很多治疗在效，并且可以治愈。
The WBC's seen here are lymphocytes, but they are blasts--very immature cells with larger nuclei that contain nucleoli. Such lymphocytes are indicative of acute lymphocytic leukemia (ALL). ALL is more common in children than adults. Many cases of ALL in children respond well to treatment, and many are curable.
