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Relationship between intrathyroid calcifications and thyroglobulin in endemic goiter
V Zaccheroni1, M P Iagulli, F Vescini
1Dipartimento di Medicina Interna, Cardioangiologia e Epatologia, Università degli Studi di Bologna, Italy.
Journal of Experimental & Clinical Cancer Research : CR
|August 28, 1999
Summary
Intrathyroid calcifications in goiters are linked to endemic areas, higher thyroglobulin (hTG) levels, and age. These findings suggest calcifications may indicate an older goiter, not necessarily cancer.
Area of Science:
- Endocrinology
- Thyroidology
- Diagnostic Imaging
Background:
- Intrathyroid calcifications are common in goiters but can also occur in thyroid carcinomas, posing diagnostic challenges.
- Ultrasonography is key for detecting these calcifications, necessitating differentiation between benign and malignant causes.
Purpose of the Study:
- To identify parameters associated with intrathyroid calcifications in patients with simple or nodular goiters.
- To differentiate between calcifications in goiters and potential neoplastic lesions.
Main Methods:
- Studied 284 euthyroid subjects (250 female, aged 24-90) with simple or nodular goiters.
- Performed ultrasonography and tested thyroid function (fT3, fT4, TSH) and specific antibodies (Ab-TG, Ab-TPO), along with thyroglobulin (hTG).
- Utilized multistep discriminant and logistic regression analyses, creating a variable (TG1) for supraphysiological hTG concentrations.
Main Results:
- 57.75% of patients exhibited intrathyroid calcifications.
- Endemic goiter area (F=96.36), supraphysiological hTG (TG1, F=24.46), and age (F=10.61) were significant predictors.
- Elevated hTG levels were sufficient to predict the presence of calcifications.
Conclusions:
- Intrathyroid calcifications in goiter patients may suggest an older, hyperstimulated goiter rather than a neoplastic lesion.
- Supraphysiological thyroglobulin levels are a key indicator for predicting intrathyroid calcifications.