Infant leukemia is a very rare disease and consists of 5% of all childhood leukemias. Infant leukemia usually presents with high leukocyte counts and numerous extra-hematological features including central nervous system and skin involvement. Herein, we report a 1-month-old girl presented with high phenylalanine level in national newborn screening program for phenylketonuria; and subsequently diagnosed to have acute lymphoblastic leukemia.
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