[Isolated pelvic metastasis of thyroid cancer]

Thyroid cancer rarely metastasizes to the pelvis. We report a case where the metastasis was found two years before the thyroid cancer. Treatment included initial surgery with resection of the metastatic tumor and reconstruction of the acetabulum with bone cement, and secondly total thyroidectomy, node dissection and I131. Surgical treatment of locoregional recurrence had no influence on the clinical course leading to the patient's death. Early diagnosis of unique metastasis of a thyroid cancer is important in terms of prognosis and quality of life. This case is exceptional due to the unique bone metastasis and treatment options for acetabular metastases. Therapeutic options should be adapted according to algorithms reported in the literature.