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Serum thyroglobulin determinations in patients with differentiated thyroid carcinoma
Nuklearmedizin. Nuclear Medicine
|August 1, 1983
Summary
Serum thyroglobulin (TG) levels can indicate differentiated thyroid carcinoma spread. However, normal TG levels in some patients with metastases limit its diagnostic value, suggesting it should complement, not replace, other tests.
Area of Science:
- Endocrinology
- Oncology
- Nuclear Medicine
Background:
- Differentiated thyroid carcinoma (DTC) is a significant health concern.
- Serum thyroglobulin (TG) is a tumor marker used in DTC management.
- Accurate staging and monitoring of DTC are crucial for patient outcomes.
Purpose of the Study:
- To evaluate the diagnostic utility of serum thyroglobulin (TG) levels in patients with differentiated thyroid carcinoma (DTC).
- To assess the correlation between TG levels and the presence and type of metastases.
- To determine the role of TG testing in the long-term follow-up of DTC patients.
Main Methods:
- Serum TG levels were measured in 636 DTC patients using a sensitive radioimmunoassay.
- 1240 TG determinations were performed across various disease and treatment stages.
- TG levels were compared between patients with and without metastases, and with healthy subjects.
Main Results:
- Elevated serum TG levels were observed in most patients with functioning and non-functioning metastases compared to healthy individuals.
- A significant proportion of patients with lymph node metastases had normal TG levels.
- Patients with distant metastases (lung, bone) exhibited the highest TG values.
Conclusions:
- Serum TG determination alone has limitations in diagnosing metastases in differentiated thyroid carcinoma.
- Normal TG levels can occur in patients with metastases, reducing its standalone diagnostic value.
- TG testing is a valuable adjunct to radioiodine scanning and aids in long-term DTC patient monitoring.