Figure 2. A comparison of imaging findings of the left and right lymph nodes.

a) Computed tomography showed a solid lymph node in the left neck (arrowhead) and cystic lymph nodes in the right neck (shown with arrows). b) Magnetic resonance imaging showed a focal hyperintense area in the T1-weighted images and a markedly hyperintense area in the T2-weighted images in the periphery of the right cervical node (shown with arrows). The left cervical nodes appeared as solid nodes with nonspecific signal intensity (indicated by arrowheads). The degree of contrast enhancement of the lymph nodes was greater in the right neck than in the left neck. c) Positron emission tomography/computed tomography showed no significant difference in fluorine-18 deoxyglucose accumulation between the right cervical nodes (shown with arrows) and the left cervical node (arrowhead).