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Inferior laryngeal paraganglioma mimicking a primary thyroid tumor
Grant D Schmit1, Brian Gorman, Jon A van Heerden
1Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.
Objective:
To report an unusual case of inferior laryngeal paraganglioma that manifested as a thyroid neoplasm.
Methods:
A case report is presented, including ultra-sonographic, surgical, histologic, and immunohistochemical findings, and diagnostic and therapeutic strategies are discussed.
Results:
In a 33-year-old man with a mass in the left side of his neck, color Doppler ultrasonography revealed an extremely hypervascular lesion that appeared to arise in the left lobe of the thyroid gland. Fine-needle aspiration was noncontributory because of bloody samples, but core biopsy specimens suggested a nonthyroidal neoplasm. At surgical intervention, a 3.5-cm mass was found immediately posterior to the left thyroid lobe, not involving the thyroid capsule. Because the mass could not be dissected free from the thyroid, performance of a left thyroid lobectomy and isthmectomy was necessary. The pathology specimen was a paraganglioma.
Conclusion:
Paragangliomas may be sonographically similar to thyroid neoplasms and may be included in the differential diagnosis of a hypervascular thyroid mass.
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