Hypothyroidism in Breast Cancer Patients After Radiation
Author Information
Author(s): P. Bruning, J. Bonfrer, M. De Jong-Bakker, W. Nooyen, M. Burgers
Primary Institution: The Netherlands Cancer Institute
Hypothesis
Does postoperative irradiation of supraclavicular lymph nodes in breast cancer patients lead to increased thyroid dysfunction?
Conclusion
Postoperative irradiation of supraclavicular lymph nodes in postmenopausal breast cancer patients is associated with a higher incidence of thyroid dysfunction.
Supporting Evidence
- Breast cancer patients who received irradiation had significantly higher TSH levels compared to non-irradiated controls.
- 25% of patients treated with aminoglutethimide developed manifest myxedema.
- Subclinical hypothyroidism was found in 78% of patients after 8 weeks of treatment.
Takeaway
When women with breast cancer get radiation treatment, it can sometimes make their thyroids not work well, which is important for their health.
Methodology
Thyroid function parameters were measured in 300 postmenopausal women divided into groups based on their treatment history.
Potential Biases
Potential bias due to the selection of control groups and the retrospective nature of the study.
Limitations
The study may not account for all factors influencing thyroid function, such as previous chemotherapy.
Participant Demographics
Postmenopausal women, average ages ranging from 57.3 to 73.7 years across groups.
Statistical Information
P-Value
0.00001
Statistical Significance
p=0.00001
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