This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Glands, Subject name: Surgery
All of the following are true about mucoepidermoid carcinoma except: 
Select and explain. 
A. Most common radiation induced neoplasm of parotid, B. Most common malignant salivary gland tumor in children, C. Usually causes facial paralysis, D. Poorly differentiated in adults
C: Usually causes facial paralysis
Answer: C: Usually causes facial paralysis 
Explanation: Mucoepidermoid carcinoma: Most common radiation induced neoplasm of parotid Most common malignant salivary gland tumor in children Types: Low grade type High grade type Well circumscribed mass having cystic mucinous material Mucin producing cells predominate Well-differentiated More Common in children TOC; Superficial or total parotidectomy Grossly infiltrative and has less tendency to cyst formation (hard tumor) Squamous cells predominate Poorly differentiated Less common TOC: Total parotidectomy +/- radical neck dissection