[Malignant sacrococcygeal teratoma in an adult].

Malignant sacrococcygeal teratoma is rare in adults. diagnosis is difficult when the tumour is presacral located. A 42-year-old female patient underwent rectum extirpation with resection of a malignant sacrococcygeal teratoma. Histological biopsy and clinical staging did not show whether the teratomas were malignant or not. These tumours have to be resected totally, when necessary together organs of the pelvic region.