METASTATIC OVARIAN STRUMOSIS IN AN IN-VITRO FERTILIZATION PATIENT

Malignant struma ovarii is a very rare tumour, with considerable contr oversy concerning the necessary histologic features for malignancy. St ill more infrequent is the condition termed 'metastatic ovarian strumo sis' or simply 'benign strumosis or strumatosis' and characterized by the presence of peritoneal implants of mature thyroid tissue occurring in struma ovarii. 'Strumosis' should not be confused with malignancy. Presented is a case of 'metastatic ovarian strumosis' in a 36-year-ol d woman with primary infertility who underwent three in-vitro fertiliz ation (IVF) cycles with ovarian stimulation. She received hormonal tre atment for 6 months after her last IVF because of 'persistent enlarged ovarian follicles' which were in fact 'thyroid follicles'.