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Metastatic papillary thyroid carcinoma with normal serum thyroglobulin level
1Department of Radiology, Harbor-U.C.L.A. Medical Center, Torrance 90509.
Clinical Nuclear Medicine
|September 1, 1988
Summary
Serum thyroglobulin (Tg) levels are useful for monitoring differentiated thyroid cancer. However, this case highlights a patient with papillary thyroid carcinoma and normal Tg levels despite widespread lung metastases.
Area of Science:
- Endocrinology
- Oncology
- Nuclear Medicine
Background:
- Serum thyroglobulin (Tg) is a standard biomarker for monitoring differentiated thyroid carcinoma (DTC).
- Tg levels are typically elevated in patients with metastatic DTC.
- Monitoring Tg aids in evaluating treatment response and detecting recurrence.
Observation:
- A case report of a patient diagnosed with papillary thyroid carcinoma is presented.
- The patient exhibited diffuse lung metastases confirmed by total body scan.
- Despite extensive metastatic disease, the patient's serum thyroglobulin level remained within the normal range.
Findings:
- This case demonstrates a discrepancy between imaging findings and serum Tg levels in DTC.
- Normal thyroglobulin levels can occur even in the presence of significant metastatic burden.
- Thyroid Carcinoma Metastasis can be present with normal thyroglobulin levels.
Implications:
- Relying solely on serum Tg levels may lead to underestimation of metastatic disease in some DTC patients.
- Total body scans and other imaging modalities are crucial for accurate staging and monitoring.
- Further research is needed to understand the mechanisms behind normal Tg levels in metastatic DTC.