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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What causes knot on mastoid bone behind ear?

My son is 7 years old and has had repeat ear infections and infection in the mastoid bone, he has also had a dermoid cyst removed from the lymph node on the back of his head. He now has a knot on the mastoid bone behind the ear. He has not had an ear infection since he had tubes in his ear 3 years ago. What could this knot be?
Mon, 4 Jul 2016
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Pediatrician, Pulmonology 's  Response
Hi...by what you quote and if the knot is not bothering him I put forth 2 possibilities -

1. Lymphadenopathy
2. Dermoid cyst recurrence.

I suggest you consult your pediatrician regarding this.

Regards - Dr. Sumanth
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