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The Journal of Nuclear Medicine Vol. 37 No. 6 993-994
© 1996 by Society of Nuclear Medicine
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Isolated Porta Hepatis Metastasis of Papillary Thyroid Cancer

Siema M. Bakheet, John Powe, Muhammad M. Hammami, Tariq M. Amin, Mohammed Akhtar and Mohammed Ahmed

Departments of Radiology, Medicine, Surgery and Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia

Correspondence: For correspondence or reprints contact: Siema M. Bakheet, MD, Consultant Physician, Nuclear Medicine, Department of Radiology (MBC-28), King Faisal Specialist Hospital and Research Center, PO Box 3354, Riyadh 11211, Saudi Arabia.

ABSTRACT

Metastases from differentiated thyroid cancer are usually seen in the cervical or mediastinal lymph nodes, lung or bone. We report a case of papillary thyroid cancer metastasizing to lymph nodes in the porta hepatis. No other site of metastasis was apparent on neck or abdominal exploration or on iodine whole-body scans. The primary tumor was a multifocal papillary thyroid cancer arising on a background of multinodular goiter. The metastasis was observed on a diagnostic radioiodine scan after surgical resection of the primary tumor despite significant (11%) radioiodine uptake by residual thyroid tissue in the neck and was proven by histologic examination and thyroglobulin immunohistochemistry. Although rare, metastasis to porta hepatis lymph nodes should be considered in the differential diagnosis of abdominal radioiodine uptake in patients with differentiated thyroid cancer.

Key Words: thyroid cancer • metastasis • porta hepatis • lymph node






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Copyright © 1996 by the Society of Nuclear Medicine.