Abstract
AbstractThe breast cancer susceptibility geneBRCA2has recently been identified as identical to the Fanconi anemia (FA) geneFANCD1. Here we expand the clinical implications of this discovery. Notably, we identified 6 children in 5 kindreds exhibiting the co-occurrence ofBRCA2mutations, FA, and early onset acute leukemia. Leukemia occurred at a median of 2.2 years of age in theBRCA2patients in contrast to a median onset of 13.4 years in all other FA patients in the International Fanconi Anemia Registry (IFAR;P< .0001). Breast cancer was noted in 4 of the 5 kindreds. Of the 6 children with leukemia, 4 were treated with bone marrow transplantation and 2 are alive at 3 and 9 months after treatment. Our results suggest thatBRCA2testing should be considered in all patients with FA in whom the complementation group cannot be defined or in whom leukemia is diagnosed at or before 5 years of age. (Blood. 2004;103:3226-3229)
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