International Journal of Medical Discoveries

Struma ovarii is a benign ovarian tumor primarily constituted of thyroid tissue, mostly arising during the reproductive years. The condition is asymptomatic and often diagnosed accidentally. The case report aimed to describe the clinical features, investigations, and management of a 28-year-old Saudi female with an ovarian mass on the right side. The patient had no other medical or surgical background and complained of pain in the abdomen. An Ultrasound examination and Magnetic Resonance Imaging showed a multiple cystic lesion, indicating an ovarian tumor. Higher scores of CA-125 further supported the malignancy. Laparotomy followed by cystectomy was done without risking ovarian function or fertility. Pathological examination of the resected tissue confirmed the diagnosis of benign struma ovarii, and there was no lymph node metastasis or thyroid disease. Upon follow-up examination, CA-125 returned to baseline, and the thyroid profile tests were normal. A follow-up ultrasound showed no lesions at 6 months. Therefore, this case demonstrates the diagnostic challenges related to struma ovarii. It also stresses the use of advanced imaging techniques and the role of surgery in identifying and dealing with the condition. Struma ovarii should be included in the differential diagnosis of ovarian lesions and should be suspected in young females complaining of non-specific symptoms.