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Case Report

EJMCR. 2023; 7(6): 125-129

Thyroid metastasis presenting as backache and lower limb weakness without any primary tumor - a case report

Javaid Iqbal, Basit Iqbal, Salman Habib, Talal A. Rahman, Imran Hadi, Hasnain Dilawar, Akhtar Ahmad.


Background: Differentiated thyroid cancer is the commonest endocrine malignancy. Mortality in the presence of distant metastasis can increase dramatically. Bony metastasis often leads to increased morbidity and mortality. We report a case of a 60-year-old male who had metastatic spread of follicular cancer of the thyroid, without any identifiable primary.
Case Presentation: A 60-year-old male presented with backache and weakness of lower limbs due to the collapse of the 11th thoracic vertebra. He underwent laminectomy and internal fixation. The histopathology revealed that it was the metastatic spread of follicular cancer of the thyroid. The histopathology revealed no malignancy in the thyroidectomy specimen. Subsequent administration of radioactive iodine showed a fall in thyroglobulin from 6,000 to 203 ng/ml.
Conclusion: In cases of metastasis from an unknown primary, follicular thyroid cancer should be included in the differential diagnosis. Treatment after thyroidectomy can lead to good results.

Key words: Differentiated thyroid cancer, follicular cancer, unknown primary, metastasis of unknown origin, case report.

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