A Promethease user (User:Sarah_Sexton) reports the following:
"My oldest daughter and I have this genotype. My other daughter has Sotos Syndrome, which is caused by deletions or mutations on the NSD1 gene. Even though my first daughter and I do not have Sotos syndrome, having this genotype makes me wonder if they are wrong about the absence of carriers. (My daughter who has Sotos syndrome is rs28932178(C;T).)"
See rs28932178 for additional information.