Fragile X syndrome and 22q11.2 microdeletion in the same sibship

We present a family with an unusual association of two frequent genetic disorders, 22q11.2 microdeletion and fragile X syndrome, originating from the same parent. Our observation confirms the wide intrafamilial clinical variability of the 22q11.2 microdeletion and illustrates the difficulty of the clinical diagnosis for the fragile X syndrome in affected females.