NCT04880798

Effect of Thyrotropin Level on Iodine Uptake in Metastatic Differentiated Thyroid Cancer

Effect of Thyrotropin Level on Iodine Uptake: a Prospective 124I PET/CT Study in Metastatic Differentiated Thyroid Cancer

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 10 (estimated)
• Sponsor: Peking Union Medical College Hospital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Distant metastases is the leading cause of differentiated thyroid cancer-related death. Radioactive iodine (RAI) treatment is the most effective therapy for RAI-avid metastatic differentiated thyroid cancer (DTC). It is well known that the efficacy of RAI therapy is depend on the sodium-iodide symporter protein, which can be synthesized by elevated thyrotropin stimulation. Therefore, thyrotropin stimulation before RAI treatment to ensure sufficient uptake of RAI has been a long-established procedure. According to some observational studies, thyrotropin of 25-30 μIU/mL has been adopted as the standard care protocol. However, whether thyrotropin of 25-30 μIU/mL is enough to stimulate iodine uptake in metastatic lesions remains unknown. In this study, the investigators aim to address the effect of thyrotropin on iodine uptake in metastatic DTC during levothyroxine withdrawal by two times 124I PET/CT scans on different endogenous thyrotropin levels.

Detailed description

It is estimated that 10 patients who met the study criteria will be enrolled. All patients underwent twice 124I PET/CT scans in Beijing Cancer Hospital. The first 124I PET/CT was prepared with endogenous thyrotropin 30±10 μIU/mL, the second 124I PET/CT was prepared with endogenous thyrotropin \>100 μIU/mL. The RAI-avidity of the metastases was assessed twice along with the levothyroxine withdrawal by 124I PET/CT scans.

Conditions

• Differentiated Thyroid Cancer

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	124I PET/CT	The first 124I PET/CT was prepared with endogenous thyrotropin 30±10 μIU/mL, and the second 124I PET/CT was prepared with endogenous thyrotropin \>100 μIU/mL. The RAI-avidity of the metastases was assessed twice along with the levothyroxine withdrawal by 124I PET/CT scans.

Timeline

• Start date: 2021-05-06
• Primary completion: 2022-12-31
• Completion: 2022-12-31
• First posted: 2021-05-11
• Last updated: 2021-05-11

Locations

2 sites across 1 country: China