It's not a cervical lymph node, it's a vein: CT and MR imaging findings in the veins of the head and neck.
The anatomy and imaging appearances of the veins of the head and neck can vary considerably, and normal veins may mimic disease processes at computed tomography (CT) and magnetic resonance (MR) imaging. On unenhanced CT scans, aberrant veins may be difficult to differentiate from lymph nodes or other pathologic conditions. Even at contrast material-enhanced CT, differences in venous enhancement or the mixing of opacified with nonopacified blood can lead to confusion, particularly if the vein is focally dilated. Similarly, the size and signal intensity of head and neck veins may vary at MR imaging due to slow or turbulent flow or variable enhancement, resulting in misdiagnosis. A thorough understanding of the normal venous anatomy and common variants is necessary to properly differentiate an unopacified or focally dilated vein from lymphadenopathy or some other disease entity and can help the radiologist avoid the erroneous interpretation of findings.
Escott
Edward J
EJ
Department of Radiology, University of Pittsburgh Medical Center, 200 Lothrop St, D-132, Pittsburgh, PA 15213-2582, USA. escottej@upmc.edu
Branstetter
Barton F
BF
D003937:Diagnosis, Differential; D006257:Head / Q000098:blood supply / Q000000981:diagnostic imaging / Q000473:pathology; D006258:Head and Neck Neoplasms / Q000175:diagnosis; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008198:Lymph Nodes / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009333:Neck / Q000098:blood supply / Q000000981:diagnostic imaging / Q000473:pathology; D010690:Phlebography / Q000379:methods*; D017410:Practice Guidelines as Topic; D010818:Practice Patterns, Physicians'; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014652:Vascular Diseases / Q000175:diagnosis*; D014680:Veins / Q000473:pathology*