tumor?

At 22 the chances of this being cancer is very small. It sounds like this is a benign fibroma or a cyst. Nine out of ten biopsies are benign. However, your doctor is right in having it biopsied. Go get it biopsied and stop worrying. You dont have a family history of cancer, you are young. No, dont worry. You are probably worrying for nothing. Hope this helps. Please let us know the results. Take care.