Isolated multiple bilateral thyroid metastases from prostatic adenocarcinoma: case report and literature review

Solitary metastasis from prostate adenocarcinoma to thyroid gland is very rare and usually associated with other distal metastasis. This report describes for the first time isolated multiple bilateral thyroid metastasis from prostatic adenocarcinoma. A 67-year-old man who is known as a case of prostatic adenocarcinoma was admitted to a hospital as a case of a multinodular goiter on the basis of clinical and CT scan findings. Total thyroidectomy was performed and histopathology result showed adenomatous goiter containing bilateral metastatic prostatic adenocarcinoma. This is the first report of isolated multiple bilateral thyroid gland metastasis from prostatic adenocarcinoma without other distal metastasis. Such lesions are very rare and can be misdiagnosed, so high index of suspicion for thyroid metastasis should be always maintained in all oncology patients with isolated thyroid mass because early resection and thyroidectomy will change the prognosis for patient.