Congenital leukemia: successful treatment of a newborn with t(5;11)(q31;q23).

A male neonate presented with a high white cell count, an 11q23 translocation, and M5b leukemia. He was treated at 3 days of age with intensive combination chemotherapy after progressing despite exchange transfusions. The patient achieved complete remission at 28 days of age. Therapy was completed at the age of 6 months. At the time of this report, the patient is 17 months old and remains in remission. Twenty-nine patients with congenital acute myeloid leukemia were also reviewed. Twenty of these patients received varying therapies. Ten of the treated patients achieved complete remission; two died of toxicity; and eight died of progressive disease. Two patients had a translocation affecting 11q23. Congenital leukemia is a rare and usually fatal condition in patients without Down syndrome. The patient reported here shows that survival may be achieved with very intensive chemotherapy plus supportive care, despite extremely high white blood cell counts and unfavorable translocation.