hydrocele (fluid collection in the scrotum), spermatocele (cyst-like growth in the scrotum
that contains fluid and dead sperm cells), varicocele (a varicose vein
along the spermatic cord), inguinal hernia, injury to scrotum, and tumors. It is best that you have the lump checked by your doctor for proper evaluation. Diagnostic tests such as ultrasound may also be done. Take care and do keep us posted.