This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Most common parotid gland tumour is 
Select and explain. 
A. Pleomorphic adenoma, B. Monomorphic adenoma, C. Primary lymphoma, D. Adeno carcinoma
A: Pleomorphic adenoma
Answer: A: Pleomorphic adenoma 
Explanation: (A) Pleomorphic adenoma # Parotid tumours> Most common is pleomorphic adenoma (80-90%)> Low-grade malignant tumours cannot be distinguished from benign neoplasms> High-grade tumours grow rapidly are usually painful and often have lymph node involvement of presentation> CT and MRI are useful> Fine-needle aspiration is better than open biopsy> Tumours should be excised, not enucleated