re: Have a pea-sized lump on my left testicle and I’m terrified

One day I noticed a had a marble sized lump on top of my left nut. I didn't wait for an appointment with GP. It freaked me out as it wasn't there the day before. Turns out to be a:

Spermatocele. This fluid-filled sac in the scrotum is often above the testicle. It tends to be painless. And usually, it's not cancer. A spermatocele also is known as a spermatic cyst or epididymal cyst.

They told me no treatment is required unless it becomes painful or very inconvenient. After removal of the cyst, this type sometimes comes back anyhow. So I'm living with a large left nut and normal right nut.