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Indium-113m Perfusion Study and the Nonfunctioning Thyroid Nodule

Tri-Service General Hospital, Taipei, Taiwan, The Republic of China

Correspondence: For reprints contact: Wei-Jen Shih, Washington Hospital Center, Dept. of Nuclear Medicine, 110 Irving St. N.W., Washington, D.C. 20010.

ABSTRACT

Indium-113m eluate has been used to study the perfusion of 12 patients with solitary thyroid nodules that appeared "cold" in the ¹³¹I and ^99mTc image studies. Seven patients with colloid nodules showed no perfusion and the remaining five (three adenomas and two carcinomas) showed good perfusion with indium. Histologic confirmation was obtained in all cases. Indium-113m perfusion study may be useful in differentiating colloid nodules from either adenomas or carcinomas.