Tonsil cancer?

Hi all. 

For the past few months I’ve noticed what looks like a growth on my left tonsil, and it seems to have increased in size slowly. I haven’t had any lumps in my neck. I saw an ENT specialist, who examined me and did a camera-through-the-nose assessment. He didn’t seem concerned at the time but arranged an MRI to be thorough.

The MRI showed that my left tonsil is asymmetrical. The consultant phoned to explain the results and said the asymmetry could be due to inflammation or previous infections, but recommended removing both tonsils. He also said that none of the lymph nodes in my neck looked concerning. 

I’m feeling really anxious about it, especially as I have small children. I haven’t had any major throat symptoms apart from the occasional sore throat. I’m wondering whether an MRI can fully rule out malignancy.