I have something that feels like a small grain on the tubelike structures in my scrotum. is that just the appendix of the testicle?

Here are some ...: A palpable tube-like structure inside the scrotum most likely represents a vas deferens - the tube to transport sperms in testis /epididymis for ejaculation with the fluid of seminal vesicles, or its nearby appendages. But to verify what it's, have Urologist to palpate so to reconcile what you felt. But, if not hurting or increasing in size, leave it alone. So, you decide. At 16, talk with parents