The malignant germinal tumors of the ovary are rare, but a rest curable whatever is the stage. We report the observation of 24 years old patient, married, never get pregnant , who was sent in our hospital for pelvic pains, the gynecological examination revealed an abdominal mass in the umbilical level . The pelvic ultrasound and the abdominal CT scan showed a heterogeneous solid mass in depends on the ovary. A laparotomy was indicated, allowed a right adnexectomy. The anatomopathologique examination is returned in favor of a dysgerminoma. The germinal tumors of the ovary are rare tumors which affect the girls and the young women, they have a good prognosis whether his stage with an optimal treatment and the majority of the patients keep their reproduction functions.
Collision tumor means the coexistence of two adjacent tumors, but histologically distinct without mixture into the fabric. These tumors involving the ovaries are rare. Benign cystic teratomas are often present at the same time as other abnormalities of the ovary. The most common histological combination in the ovary is the coexistence of cystic mature teratoma with mucinous tumors, its association with serous tumors is rare and the incidence is unknown. Ovarian mature cystic teratomas are benign often diagnosed in young girls. We present a rare case of a triple coexistence of a large tumor collision (consisting of a serous cystadenoma, mucinous cystadenoma and a mature cystic teratoma Benin) in the same ovary in a girl of 16 years.