- Partial NSD1 deletions cause 5% of Sotos syndrome and are readily identifiable by multiplex ligation dependent probe amplification. Douglas, J., Tatton-Brown, K., Coleman, K., Guerrero, S., Berg, J., Cole, T.R., Fitzpatrick, D., Gillerot, Y., Hughes, H.E., Pilz, D., Raymond, F.L., Temple, I.K., Irrthum, A., Schouten, J.P., Rahman, N. J. Med. Genet. (2005)