It's the Pits

Question: A 3 year old boy is brought to you by his mother for recurrent infections involving the skin in front of his ear.  On inspection you discover a swelling near the root of the helix.  Compression reveals purulence.  The remainder of his head and neck examination is significant for macroglossia and midfacial hypoplasia.  What is the most likely diagnosis?  [Answer will be posted with next week's new question]

Answer to last week's question, "A Fair Warning" (May 30, 2017)

Leukoplakia; 5-10%.