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Because of the prolonged survival, which was typically about 10 years in past decades, but which can extend to a normal life expectancy, the prevalence (number of people living with the disease) is much higher than the incidence (new diagnoses). [2] CLL is the most common type of leukemia in the UK, accounting for 38% of all leukemia cases.
Acute erythroid leukemia is rare, accounting for only 3–5% of all acute myeloid leukemia cases. [2] One study estimated an occurrence rate of 0.077 cases per 100,000 people each year. [ 12 ] 64–70% of people with this condition are male, and most are elderly, with a median age of 65.
The American Cancer Society estimates that in 2014, about 5,980 new cases of chronic myeloid leukemia were diagnosed, and about 810 people died of the disease. This means that a little over 10% of all newly diagnosed leukemia cases will be chronic myeloid leukemia. The average risk of a person getting this disease is 1 in 588.
As the name suggests, T-cell large granular lymphocyte leukemia is characterized by involvement of cytotoxic-T cells). [2] In a study based in the US, the average age of diagnosis was 66.5 years [3] whereas in a French study the median age at diagnosis was 59 years (with an age range of 12–87 years old). [4]
Survival rates for most childhood cancers have improved, with a notable improvement in acute lymphoblastic leukemia (the most common childhood cancer). Due to improved treatment, the 5-year survival rate for acute lymphoblastic leukemia has increased from less than 10% in the 1960s to about 90% during the time period 2003-2009. [16]
In children under 15 in first-world countries, the five-year survival rate is greater than 60% or even 90%, depending on the type of leukemia. For infants (those diagnosed under the age of 1), the survival rate is around 40%. [13] In children who are cancer-free five years after diagnosis of acute leukemia, the cancer is unlikely to return. [13]
The best prognosis is seen with RA and RARS, where some nontransplant patients live more than a decade (typical is on the order of three to five years, although long-term remission is possible if a bone-marrow transplant is successful). The worst outlook is with RAEB-T, where the mean life expectancy is less than one year.
Acute myeloid leukemia (AML) is a cancer of the myeloid line of blood cells, characterized by the rapid growth of abnormal cells that build up in the bone marrow and blood and interfere with normal blood cell production. [1] Symptoms may include feeling tired, shortness of breath, easy bruising and bleeding, and increased risk of infection. [1]
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