NF1 and Down syndrome: Kehrer-Sawatzki H et al. [10] discussed the genotype-phenotype relationships in patients with large NF1 deletions, as known as Neurofibromatosis type 1 microdeletion syndrome, and the authors suggested that overgrowth or tall-for-age stature, large hands and feet, hyperflexibility of joints, muscular hypotonia, increased numbers of subcutaneous, and plexiform and spinal neurofibromas are most common findings in the patients, however, none of these was found in our patient.