Back when I was a girl, I was having symptoms and was ignoring them. Then my parents made me go to the hospital after I suddenly fell while playing with my cousins. We went to our local hospital and had an MRI, i think? I can't remember. They looked at my results and saw a soft grey white tissue in aggregate of 3cm on the right side of my head. I had the surgery ASAP, a few weeks later because lymph nodes of the head increased both in size and in number. Below is the actual picture.
Benign Follicular Hyperlasia of Lymph Node