Sorafenib as Adjuvant to Radioiodine Therapy in Non-Medullary Thyroid Carcinoma

Thyroid Cancer Clinical Trial

Official title: Sorafenib as Adjuvant to Radioiodine Therapy in Non-Medullary Thyroid Carcinoma

Status Completed

Clinical Trial Summary

The purpose of this study is to assess whether therapy with Sorafenib reinduces radioiodine uptake in thyroid carcinoma.

Clinical Trial Description

Background of the study:

Therapy with radioiodine (RaI) is the only curative therapy in non-medullary thyroid carcinoma. RaI uptake is frequently lost in this disease. Therapy with tyrosine kinase inhibitors may restore the susceptibility to RaI.

Objective of the study:

To investigate whether therapy with the tyrosine kinase inhibitor Sorafenib will increase the accumulation of radioiodine (RaI) and decrease tumor progression in patients with recurrences or metastases of non-medullary thyroid carcinoma with absent or insufficient accumulation of RaI.

Study design:

Prospective, open study with patients with recurrences or metastases of differentiated thyroid carcinoma who will undergo 6 months therapy with Sorafenib 800 mg/day. Patients in whom RaI uptake will be restored will be offered high dose (6000 MBq) RaI together with an additional 6 months treatment with Sorafenib. Patients in whom RaI is not be restored but in whom Sorafenib had a favorable effect on tumor growth will be offered continued treatment with Sorafenib.

Study population:

Thirty patients will be included with recurrences or metastases of differentiated thyroid carcinoma that are unresponsive to RaI therapy.

Intervention (if applicable):

After inclusion, patients will undergo 131I scintigraphy as well as a CT scan. Thereafter, therapy with Sorafenib 800 mg/day will be initiated, and continued during 6 months. After 6 months, 131I scintigraphy and CT scans will be repeated. Serum levels of thyroglobulin will be used as tumormarker.

Primary study parameters/outcome of the study:

The endpoint of the study is the proportion of patients with a favorable response to Sorafenib defined as ONE OR MORE of the following criteria:

1. Reinduction of RaI uptake by RaI scintigraphy: The appearance of one or more RaI accumulating lesions at RaI scintigraphy, planar images and/or SPECT (see below)

2. Serum thyroglobulin levels:

The absence of progression: no statistically significant positive slope at linear regression of the log-transformed serum Tg levels, measured at 0, 4, 8, 12, 16, 20, 24 and 28 weeks after start of Sorafenib:

• Stable disease: The slope at linear regression of the log-transformed serum Tg levels, measured at 0, 4, 8, 12, 16, 20, 24 and 28 weeks after start of Sorafenib is not significantly different from 0 ln ug/L*time OR

• Response: The slope at linear regression of the log-transformed serum Tg levels is negative (statistically significantly below 0 ln ug/L*time).

3. CT Imaging:

The absence of progression according to RECIST criteria:

• Stable disease—neither sufficient shrinkage to qualify for partial response nor sufficient increase to qualify for progressive disease, taking as reference the smallest sum longest diameter since the treatment started.

• Partial response—at least a 30% decrease in the sum of the longest diameter of target lesions, taking as reference the baseline sum longest diameter;

• Complete response: the disappearance of all target lesions ;

Study Design

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Carcinoma
• Thyroid Cancer
• Thyroid Diseases
• Thyroid Neoplasms

• NCT number: NCT00887107
• Study type: Interventional
• Source: Leiden University Medical Center
• Status: Completed
• Phase: Phase 2
• Start date: October 2007