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Int J Surg Case Rep. 2013;4(5):524-7. doi: 10.1016/j.ijscr.2013.02.005. Epub 2013 Feb 24.

Non-Alpine thyroid angiosarcoma.

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1
Unidade Local de Saúde de Matosinhos, Matosinhos, Portugal. Electronic address: pedrogouveia@mac.com.

Abstract

INTRODUCTION:

Angiosarcoma is a very rare entity of soft tissue neoplasm with an aggressive and destructive biological behavior. Thyroid angiosarcoma is usually reported in Alpine regions, with only exceptionally rare cases arising in non-mountainous areas. In the Alpine regions it constitutes 2-10% of all malignant thyroid tumors.

PRESENTATION OF CASE:

We report a case of a thyroid non-Alpine angiosarcoma in a 71-year-old female with a 10 years old multinodular goiter. The cervical mass underwent rapid growth in the last year, and she was referred for surgical treatment. A 15cm mass was found on the right side of the neck invading adjacent tissues and displacing the trachea without obvious invasion of this organ. Fine needle aspiration cytology showed "carcinoma". Lung metastasis were present. Although difficult, total thyroidectomy was possible with resection of an esophageal implant. Post-operatively, she had respiratory failure that eventually recovered, but, on 39th post-operative day, she died of violent hemoptysis, probably due to invasion by mediastinal metastasis.

DISCUSSION:

A clear distinction between angiosarcoma and anaplastic carcinoma of the thyroid is considerably difficult, despite treatments and prognosis are practically the same. However, in recent years, a thyroid malignancy exhibiting phenotypical features of endothelial differentiation was described. Keratin positivity cannot be reported as necessarily indicative of epithelial differentiation.

CONCLUSION:

Optimal treatment for thyroid angiosarcoma remains unclear, not only because the prognosis is poor, despite multimodal therapeutic efforts, but also because it is a very rare entity.

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