Nexavar® Versus Placebo in Locally Advanced/Metastatic RAI-Refractory Differentiated Thyroid Cancer

Inclusion Criteria: * Locally advanced or metastatic differentiated thyroid cancer (papillary, follicular and Hurthle cell) * Poorly differentiated and other thyroid variants (e.g. insular, tall cell, etc.) are eligible provided that the histology has no medullary differentiation nor anaplastic features * Progression within 14 months (RECIST \[Response Evaluation Criteria in Solid Tumors\] should be used as a basis for the assessment of disease progression) * RAI (radioactive iodine) refractory Exclusion Criteria: * Histologic subtypes of thyroid cancer other than differentiated (i.e. like anaplastic and medullary carcinoma, lymphoma or sarcoma) * Prior anti-cancer treatment with tyrosine kinase inhibitors, monoclonal antibodies (licensed or investigational) that target VEGF (vascular endothelial growth factor) or VEGF Receptors or other targeted agents * Prior anti-cancer treatment for thyroid cancer with use of chemotherapy (low dose chemotherapy for radiosensitization is allowed) or Thalidomide or any of its derivatives