Incidental diagnosis of squamous cell carcinoma transformation in mature cystic teratoma of the ovary: A case report and review of literature.

Malignant transformation in a mature cystic teratoma of the ovary is a rare complication. Herein, we report a case of a 62-year-old woman who was diagnosed with squamous cell carcinoma in a mature cystic teratoma of the ovary in the histopathology examination. This case report highlights the importance of suspecting malignant transformation in an elderly woman with a large mature cystic teratoma of the ovary with a thickened wall so that proper surgical and adjuvant treatments are planned.