Torsion of epididymal cyst is a very rare condition presenting with acute scrotum. To our knowledge, this is the first case reported in a 4-year-old. Ultrasound scrotum was performed suggestive of thick-walled cystic lesion along right spermatic cord with internal echoes and septae approximately 3.1 X 1.8 cm. Based on the clinical history and examination, surgery revealed torsion testes confirmed by histological examination. The patient was discharged after the operation.
Key words: epididymal cyst, torsion, acute scrotum, testes