Preauricular sinus!

A dental student from a couple years ago had a little boy with a preauricular sinus, which is something we’ll be talking about in lecture tomorrow. She sent me a photo and gave me permission to use it in class – so I wanted to share it with you.

The dental student also shared some of the stuff she learned about preauricular sinuses:

Preauricular sinuses can be either inherited or sporadic. When inherited, they show an incomplete autosomal dominant pattern with reduced penetrance and variable expression. They may be bilateral, increasing the likelihood of being inherited, in 25-50% of cases.

I think it’s easier to remember something when you have seen it in real life (or in a picture from a dental student’s baby in real life)!