“…al in 2006, in which ND was done for primaries from different sites including oral cavity 12(44.44%), oropharynx 2(7.4%), hypopharynx 4(14.8%), larynx 6(22.22%) and unknown primary 3(11.11%) respectively. [30] Another study done by Taylor et. al had 127 ND done for different cases including oncological treatment 153(70.50%), branchial cyst 10(4.6%), carotid body tumors 5(2.3%), vagal paragangliomas 2(0.9%) and high carotid artery exposure 2(0.9%).…”