Teratoma monodérmico do tipo Struma Ovarii originando carcinoma papilífero: relato de caso

Abstract

Monodermal teratomas of the Struma Ovarii type correspond to 2.7% of ovarian tumors with a predominantly benign characteristic. However, these germinal tumors rarely have the capacity for malignancy, as observed in the present study, in which a 37-year-old female patient sought medical care complaining of pain in the right iliac fossa and a stiff and painful infraumbilical mass. She underwent a right oophorectomy and a biopsy was performed, showing a dubious pattern of cystadenoma between borderline pattern and carcinoma. Immunohistochemical reactions were performed that showed the diagnosis of monodermal teratoma of the Struma Ovarii type. This study aims, therefore, to analyze the case and demonstrate the main characteristics of this tumor, which mostly mimics the histological pattern of papillary thyroid carcinoma, which is the reason for the origin of the name “Struma Ovarii”.