A unique case of malignant mixed müllerian tumor with metastasis to the thyroid: a case report.

We present a case of a 61-year-old postmenopausal woman with a known diagnosis of malignant mixed müllerian tumor (MMMT) originally treated with systemic chemotherapy and total abdominal hysterectomy plus bilateral salpingo-oophorectomy, who developed a left cervical mass noted on a follow-up visit. Imaging and nuclear testing were both performed confirming the presence of a cervical mass arising from the thyroid. Our patient underwent surgical resection of the mass, and biopsy of the specimen was consistent with metastatic uterine carcinosarcoma mixed müllerian tumor. Chemotherapy was initiated with a positive outcome.