There urc eigłit known complementation groups In Fanconi Alwernia (FA-A to FA-H). The two most frequcnt complementation groups arc FA-A and FA-C, together they account for 75-80% of patients. Gcncs for throc Fanconi Anacmia complementation groups havc bccn identifled:
Othcr implicated gcnc loci inelude: F\NCD(3p26-p22)
I(6p22-p21)