Leukaemia and other allied blood disorders
Inheritance patterns and prenatal diagnosis
Inheritance patterns
The majority of cases of leukaemia are not hereditary. Identical twins of children with ALL show a significant excess chance of developing ALL. Down syndrome is associated with an incidence of acute leukaemia, about twenty times higher than is seen in the general population. There is evidence that a small minority of cases of CLL and of AML may be familial.
Prenatal diagnosis
Not applicable
Related disorders
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