Hello and welcome to HCM,
A hard to firm lesion on the testicle can be due to many causes.
It could be a
cyst, an epidydimal cyst.
There are various remnants of testis called appendices of testis.
These are normal structures of testis and do not cause any harm,
Spermatoceles are structures formed after
vasectomy.
After vasectomy, the sperms in the semen can lead to formation of spermatocele.
Besides it could also be a primary skin lesion, like skin tag, papilloma,
wart, etc.
For knowing the nature of the lesion, an
ultrasound of the testis is required.
Consult your surgeon for clinical examination, relevant investigations, and management.
Thanks and take care
Dr Shailja P Wahal