Figure 1From: 9q22 Deletion - First Familial CasePedigree of the family Patients 1, 2, and 3 all have the deletion of 9q22, as indicated by the star. The healthy mother, sister, and paternal grandparents, do not have the deletion, as indicated by N. The healthy brother was not tested for the deletion. Only patients 1 and 2 (P1, P2) have mental retardation.Back to article page