Refinement of the postnatal growth restriction locus of chromosome 5q12-13 deletion syndrome.

Individuals with deletions of chromosome 5q12-13 have rarely been reported and have a range of phenotypes including postnatal growth restriction, intellectual disability, hyperactivity, and ocular abnormalities. Most individuals reported have large deletions or complex rearrangements which have made identifying genes responsible for these phenotypes challenging. Here we report an individual with a chromosome 5q12-13 deletion with intellectual disability, hyperactivity and restricted linear growth. Based on the location of our patient's deletion in relation to the previously reported deletions, we have narrowed the locus for postnatal growth restriction to less than 1 megabase. Further refinement of this locus with reports of additional individuals with deletions of this region will allow for better understanding of the gene(s) responsible for this phenotype.