Malignant transformation of mature cystic teratoma is an uncommon complication. While any of the constituent tissues of a teratoma has the potential to undergo malignant transformation, squamous cell carcinoma is the most commonly associated cancer. We present an unusual case of a postmenopausal woman with synchronous mucinous adenocarcinoma and strumal carcinoid tumor from one of two ovarian mature cystic teratomas (one in each ovary) with synchronous cervical cancer. We suggest that malignant transformation of mature cystic teratoma and synchronous cervical cancer be treated by hysterectomy, chemotherapy, and radiotherapy.

Fetal cystic hygroma is a rare developmental congenital anomaly of the lymphatic system, characterized by the formation of a multilocular, variable sized cystic mass. Most of cystic hygromas are found in the neck and other rare locations include axilla, mediastinum, and limbs. There are many papers about cystic hygroma colli, but there are only a few papers about fetal axillary cystic hygroma and no domestic papers. We present a case of fetal axillary cystic hygroma diagnosed antenatally followed by full-term delivery in a 30-yr-old woman. Operation was performed on the 8th day after birth and the mass was excised and confirmed as cystic hygroma.

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