[Thyroid carcinoma in an adult cystic teratoma of the ovary with bony metastases].

An oophorectomy specimen in a patient aged 36 showed a dermoid cyst with a struma ovarii and what was considered to be a folliculo-trabecular adenoma. Two osseous metastases appeared 4 and 8 years later respectively. The follow-up so far is 15 years. This is the twentieth reported case of mature cystic teratoma of the ovary containing metastating thyroid carcinoma.