Pituitary Metastases from Thyroid Carcinoma: Case Series and Literature Review

Metastases to the pituitary gland are extremely rare. Most of the reported cases arise from breast and lung cancer, with metastases from thyroid cancer seldom reported. Thyroid cancer metastases to the pituitary gland may occur as the initial presentation of metastatic disease or part of widespread disease and may occur years after the primary thyroid cancer diagnosis. Herein, we present three cases of thyroid cancer that metastasized to the pituitary gland and review the literature to address its clinical and radiologic features, prognosis, treatment, and differential diagnosis.