[Hydatid cyst of the spermatic cord].

The authors report the third published case of hydatid disease of the spermatic cord and describe its unusual presentation in the form of hydrocele. Hydatid disease is endemic to some countries, where it constitutes a real public health problem. It can affect all organs of the body. However, primary involvement of the spermatic cord is exceptional. Implantation of the hydatid larva is essentially haematogenous. The positive diagnosis is based on ultrasound. Eosinophilia is neither constant nor specific and only contributes to the diagnosis when it is positive. However positive hydatid serology has a diagnostic and prognostic value. Resection of the roof of the cyst is the treatment of choice.