Breast Cancer Metastasis to the Thyroid: A Case Study and Literature Review
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Abstract
Introduction: Thyroid localization of breast cancer is rare and has a poor prognosis. Common metastatic sites of breast carcinoma are lung, liver, and bone. The clinical diagnosis of thyroid metastasis from a malignant tumor is difficult. We report a case of thyroid metastasis of breast origin. We then discuss the diagnostic methods and their particularities in the identification of such a lesion. Observation: This was a 47-year-old patient who underwent a left mastectomy with ipsilateral axillary lymph node dissection in 2014 and who consulted 9 years later following the appearance of a thyroid mass and a right spinal lymphadenopathy. Cervical imaging reveals spinal cervical lymphadenopathy and a nodular goiter classified EU-TIRADS 4. A fine puncture of the cervical lymphadenopathy and the thyroid nodule are performed. Cytological examination reveals thyroid metastasis from a breast carcinoma and metastatic cervical lymphadenopathy. The patient underwent surgery (total thyroidectomy) confirming the diagnosis. Conclusion: The diagnosis of thyroid metastasis should be suspected in patients with a history of neoplasia in the presence of a nodular goiter. The treatment of these metastases is that of the primary cancer.
Key words: Thyroid, metastases, diagnosis, ultrasound; cytopuncture; anatomopathology.
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This work is licensed under a Creative Commons Attribution 4.0 International License.
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