 The primary focus of this arm of the protocol is identifying ceritinibs activity in anaplastic or undifferentiated thyroid cancer patients. Those patients with mutations identified in their ALK gene by sequencing their tumor samples, or with the established ALK abnormalities will be treated with ALK-inhibitors. These include the Ventana assay and Vysis FISH probe, and patients with tumors positive by this assay will also be considered eligible for therapy on the trial. 