C91.1: Chronic lymphocytic leukaemia of B-cell type
Chronic lymphocytic leukaemia of B-cell type is a type of cancer that starts from cells that become certain white blood cells (called B-cells) in the bone marrow. The cancer (leukemia) cells start in the bone marrow but then go into the blood. It's called 'chronic' because it progresses more slowly than other types of leukemia. The particular type of leukemia described here affects B cells, which are immune cells that create antibodies to fight off infections. Over time, these cancerous B cells multiply and crowd out healthy blood cells leading to a shortage of red cells (causing anemia), platelets (leading to increased bleeding and bruising) and healthy white cells (leading to infections). Symptoms may include fatigue, weight loss, frequent infections, and swollen lymph nodes. It generally affects older adults and is rarely seen in individuals under the age of 40.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.