Acute lymphoblastic leukaemia with t(4; 11) follows neuroblastoma: A late effect of treatment?

Abstract
The case presented is of a 7‐year‐old girl who developed acute lymphoblastic leukaemia (ALL) with t(4; 11)(q21; q23) 5 years after the onset of neuroblastoma and 4 months after completing treatment for a first relapse. Consideration is given to the relative importance in this case of genetic factors and chemotherapeutic drugs in the etiology of ALL.