NCT04495985Active, not recruiting
CASE 1320: RAI Uptake and Serum Prolactin in Thyroid Cancer
Breast Uptake on Radioiodine Scan and Serum Prolactin in Thyroid Cancer Patients Prepared by Thyroid Hormone Withdrawal or Recombinant Human Thyrotropin: A Prospective Study
Source: ClinicalTrials.gov · Last updated 28 Jan 2026
Brief summary (registry, in English)
Radioactive iodine (RAI) is a radioisotope used to ablate thyroid gland remnant after thyroidectomy in patients diagnosed with differentiated thyroid carcinoma (DTC). A whole body scan (WBS) is performed to not only evaluate for iodine uptake by the native thyroid tissue but also to observe for uptake in other areas of the body, which could be physiological or indicative of iodide-avid metastases. Research has shown a correlation between breast cancer and thyroid cancer. Patients with DTC have been found to have elevated levels of serum prolactin, which could lead to mammary gland dysfunction. In patients with DTC undergoing RAI scanning or therapy, it has been previously observed that patients prepared by thyroid hormone withdrawal have significantly higher breast uptake on whole body scan compared to those prepared by rh-TSH. Considering the impact of prolactin on breast tissue, this study aims to correlate these findings with the lab values and the method of preparation. Accordingly, the research question is as follows: does the method of WBS preparation impact prolactin levels and how does that correlate with breast uptake in patients with DTC undergoing RAI WBS?
- Status (registry)
- Active, not recruiting
- Study type
- Observational
- Enrollment
- 39 (actual)
- First submitted
- 10 Jun 2020
- Start date
- 14 Jul 2020
- Primary completion date
- 27 Jul 2022
- Lead sponsor
- The Cleveland Clinic
- Diseases
- Thyroid cancer
- NCT number
- NCT04495985
What you commit to
- Study type: Observational
- Participants enrolled: 39
- From 14 Jul 2020 to the primary completion date, 27 Jul 2022
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Patients with a history of breast cancer
- Patients with a known history of hyperprolactinemia
Lab values
- Patients receiving medications known to raise serum prolactin
Other
- Males
Who the study is looking for
- Female patients with diagnosis of differentiated thyroid carcinoma who have had thyroidectomy performed previously
- Patients able to understand and sign informed consent for imaging
- Patients already scheduled to undergo radioactive iodine whole body scanning (RAI WBS)
Age in the registry: 18 years to - · Sex: Female · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Cleveland Clinic Coordinator of this site? Confirm its status | Cleveland | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.