An Unexpected Neighbor — Headmirror

We want to notify Headmirror users that OtoRecall is now once again available in the Apple App Store.  If you have not used this incredible (FREE) learning resource, check it out today! This free offering was made possible by the generous support of Cochlear Ltd, and Stryker Corp. Link to here: https://www.headmirror.com/otorecall

An Unexpected Neighbor

Question:   You are evaluating a patient with a biopsy proven right sided tonsil squamous cell carcinoma which is HPV positive.  He has a single cystic lymph node in the right neck in level III.  Looking through his CT scan, you also note an cystic 1 cm mass medial to the internal carotid artery and just below the level of the palate.  What does this finding most likely represent?     [Answer will be posted with next week's new question]

Answer to last week's question, Colliding at Dizzying Speed (December 21, 2015): 

Labyrinthine concussion.

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