Congenital acute lymphocytic leukemia in a newborn with Klinefelter syndrome

Abstract
A patient with congenital acute lymphocytic leukemia and Klinefelter syndrome is described. The abnormal karyotype appeared in both unstimulated lymphoblasts and stimulated remission lymphocytes. A buccal smear confirmed the presence of extra chromatin material. Klinefelter syndrome has not been described in congenital acute lymphocytic leukemia.

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