Just found mass on forearm

collardgreens

I have been watching a mass/lump on my forearm for about 4-weeks, it is on the same side as my original breast cancer. I saw the doctor yester day and now I'm having an ultrasound of my lower forearm and upper area on Monday. The doctor said it is not lymphedema. Has anyone had this happen to them? July 2023 will mark my 10 year cancer free milestone. Thanks