Conditions: Differentiated Thyroid Cancer
Keywords: vandetanib, AZD 6474, Differentiated Thyroid Cancer
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 238
Healthy volunteers: no

Brief summary:
Primary Objective:

To determine the efficacy (as assessed by progression-free survival \[PFS\]) of vandetanib when compared to placebo in participants with differentiated thyroid cancer that is either locally advanced or metastatic who are refractory or unsuitable for radioiodine therapy.

Secondary Objectives:

* To determine the efficacy of vandetanib when compared to placebo in this participant population as assessed by efficacy variables including duration of response (DOR), objective response rate (ORR), change in tumour size (TS) and overall survival (OS).
* To evaluate the pharmacokinetics (PK) of vandetanib in this participant population and potentially investigate any influence of participant demography and pathophysiology on vandetanib PK.
* To demonstrate an improvement in time to worsening of pain (TWP) in participants treated with vandetanib when compared to placebo in this participant population.
* To evaluate the safety and tolerability of vandetanib treatment in this participant population.

Detailed description:
Participants who received vandetanib as randomized treatment were allowed, upon re-consent, to continue on open-label vandetanib if in the opinion of the Investigator the participant received benefit. Placebo participants who experienced disease progression within 60 days of unblinding were offered the option of treatment with open-label vandetanib if, in the Investigator's opinion, such treatment was of clinical benefit to the participant. Approximately 2 years; duration depends on individual participant response.

Arms:
arm 1: Participants received Vandetanib 300 mg tablet, orally once daily until disease progression or death, in randomized treatment period (up to maximum of 40 months). Participants who completed the randomized treatment period, were offered the opportunity to continue the same vandetanib treatment in the open label period, if in the investigator's opinion, they received benefit and if the participant agreed and provided their informed consent to continue the open-label period for up to additional 31 months. arm 2: Participants received placebo matched to Vandetanib tablet, orally once daily until disease progression or death, in randomized treatment period (up to maximum of 40 months). Participants who completed the randomized treatment period, and experienced disease progression were offered the option of treatment in open-label period with vandetanib, if in the investigator's opinion, they received benefit and if the participant agreed and provided their informed consent to begin open-label vandetanib treatment i.e., 300 mg tablet, orally once daily for up to 31 months.

Interventions: intervention 1: Vandetanib (SAR390530) intervention 2: Placebo
Intervention descriptions: intervention 1: Pharmaceutical form: tablet

Route of administration: oral intervention 2: Pharmaceutical form: tablet

Route of administration: oral

Protocol document: