What is This Vein-like Lump in my Scrotum? (photo)

This is a lesion that should be seen and examined by a urologist. Often a scrotal ultrasound is done to ensure there are no intrascrotal/testicular abnormalities and nothing else likel varicoceles ... Seek guidance from a urologist. 

If the spot looks like a very smally vein it may be an angiokeratoma. Either way, I would see either of these two specialists to be sure.