This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Perineural spread is seen in: 
Select and explain. 
A. Mucoepidermoid carcinoma, B. Keratoacanthoma, C. Adenoid cystic carcinoma, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Perineural spread is seen in

Mucoepidermoid carcinoma
Keratoacanthoma
Adenoid cystic carcinoma

Keratoacanthoma 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- Shafer's 7th Ed  P: 236