I think you mean on the right side. By convention, when transverse cuts are made, they are viewed as if the examiner is standing at the patient's feet. So, the bright white spot is actually located on the patient's right side.
The fact that the mass is not bilateral is concerning. However, it is also hard to determine exactly where it is coming off of with so few images.
However, it does not compress, or invade, or shift the tissues of the cerebellum. Which is good.
Since it is bright white on this sequence of images (which appear to be T1, but can't tell for sure), that means that it has a very high content of water in it. It could be fluid, fat, or blood.
As stated, you usually like to see things mirrored on the body, ie bilateral. But, not all abnormalities are necessarily bad.
You should discuss this with the physician who ordered the study. All findings have to be correlated with the patient's history and examination to determine their significance.
Thank you for your reply. I'll explain a bit more. Last year after a surgery my body started acting weird and all sort of symptoms appeared. Mostly left side neurological stuff, numbness, tingling, muscle weakness, nerve pains etc etc. The neurologist thought it might me MS and ordered a mri. I was told no abnormalities showed up on it. After a while I asked for my file and looked at the MRI images and saw the white lump visible on more than 1 image and wondered if it meant anything. On the one hand I can't believe this would be overlooked if it would indicate something concerning and on the other hand, you never know. I am not sure if I want to discuss it with the neurologist. I mean, make an appointment and ask if they did their job? I don't know.
I really wonder what could be causing it though.
Try to get in touch with the neurologist again and simply say that you wanted to find what that white lump indicated if anything. Excuse yourself as a worrywort if you have to. If that doesn't help, try another neurologist.