A risk factor can be anything that influences the development of any cancer. But having a risk factor, or many, does not give certainty of having particular cancer. Some people with no risk factors can also develop cancer.
In general, leukemia occasionally can be due to a genetic mutation or change. These may be genetic mutations within a family or from environmental factors, like smoking or exposure to chemicals or radiation. However, often the cause of leukemia is unknown.
The mentioned risk factor can increase a person’s chance of developing T-cell leukaemia-Race/Ethnicity – ATLL is more common in people of Japanese, West Indian, and African American descent.