Pilot Study to Determine Radioiodide Accumulation and Dosimetry in Breast Cancers Using 124I PET/CT
This is a pilot imaging study for women whose tumors express NIS [Na+I- symporter, sodium iodide symporter]. Eligibility is limited to the presence of strong (3+) and/or plasma membrane staining in > 20% of cells as determined by immunohistochemical methods. A total of 10 patients will be imaged with 124I PET/CT (serial scans over 24 hour period) to determine radioiodide uptake and distribution in tumor tissue. Thyroid iodide uptake and retention will be blocked beginning one week prior to 124I PET/CT scan with thyroid hormone (T3) and methimazole (impedes organification). Tumor, organ and whole body dosimetry will be calculated in each patient.
Breast Cancer Early Stage Breast Cancer (Stage 1-3)
Breast Cancer Metastatic Breast Cancer
Procedure: 124I PET/CT
|Study Design:||Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||A Pilot Study to Determine Radioiodide Accumulation and Dosimetry in Breast Cancers Using 124I PET/CT|
- Radioiodide accumulation [ Time Frame: 2 years ] [ Designated as safety issue: No ]To evaluate radioiodide accumulation in women with immunohistochemically NIS (Na+/I- symporter)-positive breast cancers using 124I PET/CT.
- Dosimetry [ Time Frame: 2 years ] [ Designated as safety issue: No ]To calculate dosimetry in tumor, thyroid and whole body.
|Study Start Date:||February 2008|
|Study Completion Date:||December 2012|
|Primary Completion Date:||December 2012 (Final data collection date for primary outcome measure)|
|United States, California|
|Stanford University School of Medicine|
|Stanford, California, United States, 94305|
|Principal Investigator:||Irene L. Wapnir||Stanford University|