Teaching NeuroImages: an Atipical Cause of Acute Neck Pain.

A healthy 54-year-old woman developed spontaneous acute onset of sharp left-sided neck and facial pain and odynophagia following a brief flu-like illness. CT angiography revealed eccentric perivascular infiltration at the left carotid bifurcation (figure 1) with corresponding enhancement on MRI (figure 2). She was empirically treated with prednisone and had clinical and imaging improvement at follow-up.