TG and struma ovarii: Some advocate a post-operative total-body 131I scintiscan to assess for residual malignant disease and trending serum thyroglobulin levels to monitor for recurrence and adjuvant therapy only if these were positive, and this should be used with caution if not in the setting of thyroidectomy as most malignant struma ovarii have poor iodine uptake and thyroid hormone synthesis [1, 15].