This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Sialosis refers to 
Select and explain. 
A. Bilateral parotitis, B. Sjogren's syndrome, C. Non inflammatory parotid enlargement, D. Bilateral salivary duct ectasia
C: Non inflammatory parotid enlargement
Answer: C: Non inflammatory parotid enlargement 
Explanation: Sialosis refers to enlargement of salivary gland due to fatty infiltration, as a result of various metabolic causes like diabetes, acromegaly,obesity,liver disease,alcoholism,bulimia,idiopathic,drug induced(sympathomimetics,carbimazole,thiouracil) SRB,5th,409