[Superinfection of ovarian dermoid cyst. Apropos of a case].

One case of a rare complication of dermoid ovarian cyst is reported: infection. Sonographic examination was not helpful, mainly due to a great quantity of gas within the mass. However radiography of the abdomen with the patient upright and CT showed a gas-fluid level, teeth and presence of fat. These findings permitted diagnosis of a complicated ovarian dermoid cyst before surgery.