There are many possible reasons for a lump on your testicle. You should see a doctor as soon as possible. See the link below.
A carcinoma is a cancerous tumor.
It could very well be. It could also be a harmless cyst. Better have that checked out right away to be sure.
a testicle
"My Father had a biopsy to make sure the lump was not cancerous"
It is more than likely it is cancerous. And can be treated only be seeing a vet. Mine had the same problem.
She found a lump and feared that she had breast cancer but the lump turned out to be non cancerous.
The doctor assured her that the lump was benign and not cancerous.
The most common symptom of testicular cancer is a painless lump or swelling in the testicle.
It is called as malignant tumor.
Typically you don't see a breast cancer lump, but notice it when touching, washing, or scratching your breast.
Go to the doctor as soon as possible. It is probably nothing but it could be cancerous