“…Diagnostic techniques for lymph node metastasis include computed tomography (CT) 31 , magnetic resonance imaging (MRI) 13 , and ultrasonography 10,28 . However, the diagnostic accuracy of these radiologic techniques for cervical lymph node metastasis is limited by erratic groups of small lymph nodes, inclusion of adipose tissue, ectopic salivary glands 27 , and hilar enlargement.…”