Spontaneous scrotal emphysema--a cause of scrotal swelling

Scrotal emphysema developed in a 24-year-old man without any sign of infection and without any trauma involved. The condition gradually improved over a few days and at follow-up one week later he was back to his normal state. No clue to the cause was found and it is therefore justifiable to claim that the patient has a 'spontaneous scrotal emphysema'.