[Dermoid cyst of the urachus: a case report and review of the literature]. / Kyste dermoïde de l'ouraque: à propos d'un cas et revue de la littérature.

The urachus, a normal embryonic remnant of the primitive bladder dome, exists as a fibrous cord in adult. Urachal disorders are not exceptional, and are expression of incomplete regression. Diagnosis is generally ultrasonographic, rarely clinical. We report a case of urachal dermoid cyst revealed by abdominal pain and underline the diagnostic difficulties related to this unusual localization.