RT Journal A1 van der Plas E, Conrad A, Canady J, Richman L, Nopoulos P T1 EFfects of unilateral clefts on brain structure JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 2010 FD August 1 VO 164 IS 8 SP 763 OP 768 DO 10.1001/archpediatrics.2010.123 UL http://dx.doi.org/10.1001/archpediatrics.2010.123 AB Objective  To evaluate potential abnormalities in brain structure of children and adolescents with unilateral clefts.Design  Case-control study.Setting  Tertiary care center.Participants  Boys aged 7 to 17 years with right (n = 14) and left (n = 19) clefts were compared with healthy age-matched boys (n = 57).Main Exposures  Structural brain measures were obtained using magnetic resonance imaging.Outcome Measure  It was explored whether laterality of clefts had a significant effect on brain structure. To this end, volumes of tissue types and various brain regions were evaluated.Results  Total white matter was significantly lower in boys with right clefts compared with boys with left clefts and healthy boys. Gross regional analyses demonstrated that reductions in white matter were evident in both the cerebellum and the cerebrum in boys with right clefts. Furthermore, within the cerebrum, white matter volumes were particularly low in the frontal lobes and the occipital lobes.Conclusions  These preliminary results suggest that right clefts may be associated with more abnormalities in brain structure. More generally, laterality of a birth defect may have a significant effect on a developing organism.