Ultrasound of a patient with penetrating scrotal trauma: finding a needle in a haystack

We present a case of a 27-year-old man who referred to the Emergency Department complaining scrotal pain. He mentioned a sharp penetrating scrotal trauma occurred at work. Clinical examination showed mild scrotal tenderness. The patient underwent scrotal ultrasound that showed only a suspicious foreign body in the tunica vaginalis. A scrotal surgical exploration was performed and a nail was confirmed at the level of the tunica vaginalis.