This is a non-interventional, multi center post-authorization safety study that includes all patients diagnosed as Unresectable Differentiated Thyroid Carcinoma (DTC) and treated with Sorafenib within a certain period. The investigator should have made the choice of treatment (NEXAVAR) according with the Japanese Package Insert prior to enrolling the patient in this study. The enrollment period is of 9 months. The observation period for each patient starts when the therapy with NEXAVAR is initiated. Patients will be followed for 9 months or until it is no longer possible (e.g. lost to follow-up); this will be considered the standard observation period. Those patients, to whom a total of 24 month follow up is possible, information on effectiveness including treatment duration and survival status of the patient and of keratoacanthoma and/or squamous cell cancer development will be collected.
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Number of participants with Adverse drug reaction as a measure of safety and tolerability.
Timeframe: Up to 9 months
Number of participants with Serious adverse events as a measure of safety and tolerability.
Timeframe: Up to 9 months
Number of participants with Serious adverse drug reaction as a measure of safety and tolerability
Timeframe: Up to 9 months