[Idiopathic scrotal edema].

Idiopathic scrotal edema causes painful enlargement of the scrotum, as does torsion of the testis or of a testicular appendage, or epididymo-orchitis. Unilateral edema of the scrotum develops rapidly, the skin becomes pale pink or red, and there is discomfort rather than acute pain. Careful palpation reveals a nontender testis. The condition is usually self-limited, and resolves completely without treatment in 48 hours. It must be differentiated from testicular torsion, for which urgent surgical treatment is mandatory.