Torsion of a communicating hydrocele in a child.

Among the diseases presenting as acute scrotum, torsion of a communicating hydrocele is extremely rare. A 5-year-old boy was referred with discomfort and swelling of the left scrotum. Operative findings revealed a torsion of a communicating hydrocele. We report a case of torsion with preoperative findings of ultrasonography and magnetic resonance imaging. We also emphasize the awareness of this disease as a differential diagnosis of the acute scrotum.