Expert's Comment concerning Grand Rounds Case entitled "Congenital C1 arch deficiency: Grand Round presentation" (by M. Elmalky, S. Elsayed, G. Arealis, H. Mehdian doi:10.1007/s00586-013-2682-z).

Expert's Comment concerning Grand Rounds Case entitled "Congenital C1 arch deficiency: Grand Round presentation" (by M. Elmalky, S. Elsayed, G. Arealis, H. Mehdian doi:10.1007/s00586-013-2682-z).