C91.9: Lymphoid leukaemia, unspecified
Lymphoid leukaemia is a type of blood cancer originating from the lymphocytes, white blood cells that play a crucial role in the body's immune defense system. This condition is characterized by the overproduction of these abnormal, immature lymphocytes that are unable to function properly, leading to a weakened immune response. Common symptoms include weakness, fatigue, frequent infections, unexpected weight loss, swollen lymph nodes, and increased bleeding or bruising. Although it can affect individuals of any age, it is more commonly seen in older adults. The disease progression varies from slow (chronic) to fast-growing (acute), based on the subtype of lymphoid leukaemia. It mainly affects the bloodstream and the bone marrow where blood cells are produced, but over time, may also involve other vital organs such as the liver, spleen, and lymph nodes.
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