A varicocele is a palpable or visible dilation of the vessels of the pampiniform plexus in the scrotum. Backward flow of venous blood in the internal spermatic vein dilates the pampiniform plexus. Varicoceles are more common on the left due to the greater distance the internal spermatic vein must traverse to the left renal vein when compared with the right. It is unusual for males to exhibit a varicocele prior to adolescence, and the majority of varicoceles are asymptomatic. Many men have a varicocele and are not even aware of it. Varicoceles are less commonly diagnosed during an evaluation for scrotal pain or a scrotal mass.
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