Chromosome 17q11.2 Deletion Syndrome, also known as nf1 microdeletion syndrome, is related to neurofibromatosis, type i and neurofibromatosis. An important gene associated with Chromosome 17q11.2 Deletion Syndrome is NF1 (Neurofibromin 1). Affiliated tissues include skin and eye, and related phenotypes are multiple cafe-au-lait spots and freckling