A preauricular sinus is deeper than a preauricular pit. The sinus tract is lined with a stratified squamous epithelium. The tract of a preauricular sinus may become chronically infected and emit a painless,...
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![Infected Preauricular Sinus [left]](https://medtube.net/images/min/b2a376c3b648e197301f2029f597aaea/149/112/1 "Infected Preauricular Sinus [left]")