Clinical trial · Observational
A Prospective Study of Hypothyroidism After Radiotherapy for Breast Cancer
Hypothyroidism After Postoperative Radiation Therapy in Patients With Breast Cancer：a Prospective Clinical Study
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
This study is to prospectively investigate the incidence of hypothyroidism after postoperative radiotherapy and identify risk factors for development of hypothyroidism. Patients with breast cancer treated with surgery followed by radiotherapy is enrolled. Thyroid function was assessed at baseline and different times after radiotherapy. The radiation technique, thyroid dose parameters and hypothyroidism are prospective evaluated, and the dose-effect relationship is analyzed.
Conditions
Conditions (3)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Breast Neoplasms | Breast Neoplasm | ONTOLOGY_EXACT | 0.98 |
| Hypothyroidism | — | UNRESOLVED | — |
| Radiation Toxicity | — | UNRESOLVED | — |
Interventions
Interventions (0)
Data not yet available
Design
Arms and outcomes
Arms (0)
[]Primary outcomes (1)
- measure
- Number of participants with treatment-related hypothyroidism as assessed by CTCAE v4.0
- timeFrame
- up to 2 years
- description
- The subclinical and biochemical hypothyroidism are regularly assessed with the measurement of thyroid-stimulating hormone (TSH), free triiodo-thyronine (FT3) and free thyroxine (FT4).
Eligibility
Eligibility (as posted)
- Sex
- Female
- Minimum age
- 18 Years
- Maximum age
- 70 Years
Show eligibility criteria text
Inclusion Criteria: Breast cancer patients at first diagnosis, patients who are treated with radiotherapy after breast conserving surgery or modified radical mastectomy, no medical history of hyperthyroidism, hypothyroidism or thyroiditis, have never taken thyroxine, no thyroid surgery. Exclusion Criteria: Absence or ectopic thyroid gland, previous radiotherapy of the neck, diseases of thalamus or pituitary, previous radiotherapy of thalamus or pituitary
References
Publications (0)
Data not yet available