<prompt> Perineural spread is seen in:Mucoepidermoid carcinomaKeratoacanthomaAdenoid cystic carcinomaAll of the above  <response>: Perineural spread is seen inMucoepidermoid carcinomaKeratoacanthomaAdenoid cystic carcinomaKeratoacanthoma on occasion may invade perineural spaces, but this does not adversely affect the biologic behavior of the lesion; neither can it be used as a distinguishing characteristic between keratoacanthoma and epidermoid carcinoma.Ref- Shafers 7th Ed P: 236 