A 17 year-old self-identified male presents to his GP complaining of discomfort in his left scrotum. The testis is non-tender and the epididymis normal. A “bag of worms” sensation can be felt in the upper scrotum. There is no cough impulse in the inguinal region and the ductus deferens can easily be palpated. Based on the above information, what is the most likely diagnosis?