I'm scared the doctor is going to tell me i have testicular cancer. how common is it?

Not common.: Other cancers, like renal and prostate are far more common. Its peak age incidence is 20-40. There are 2 subtypes, seminoma and non-seminoma. Seminoma is highly sensitive to radiation therapy. Staging involves serum alphafetoprotein (afp), b-human Chorionic Gonadotropin (b-hcg), chest x-ray, and ct scan of the abdomen and pelvis. There is 95% cure if treated right.

See your physician: See your physician, only 1 to 2% malignant tumors of men are testicular tumors, so they are not that common , if tumor is found in testis most of the time it is malignant.