GPRIN2 and Hydrocephalus: An additional sample with two events was a fetus with hydrocephalus found to have two duplication CNVs, on chromosome bands 1p33 (including the genes FAAH, DMBX1 and KNCN) and 10q11.22 (containing the genes SYT15, GPRIN2 and PPYR1), but parental samples were not available in this case.