Fig. 21

Cystic metastatic lymph node. Patient presenting with a palpable left neck mass, no other symptoms. a Axial contrast-enhanced CT image demonstrates a well-circumscribed, low attenuation lymph node in the left carotid space (white arrows); note some areas of peripheral nodularity. This node causes mass effect with anterior displacement of the left internal jugular vein (LIJ), and lateral displacement of the sternocleidomastoid muscle (SCM). b Axial contrast-enhanced CT image at a higher level in the same patient demonstrates an ill-defined mass centered at the left tongue base (arrows). Biopsy of this lesion demonstrated squamous cell carcinoma