What is chronic myeloid leukaemia?

Chronic myeloid leukaemia (CML), also called chronic myelogenous leukaemia, is a rare type of cancer that affects the bone marrow and white blood cells.
It can be diagnosed at any age but is more common in people aged 65 or over.
CML develops slowly, over several years, and is usually treatable.

Page last reviewed: 27 September 2023
Next review due: 27 September 2026