Uptake of I-131 by an abdominal neurilemoma mimicking metastatic thyroid carcinoma

P. W. Wang*, H. Y. Chen, C. H. Li, W. J. Chen

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

21 Scopus citations

Abstract

I-131 whole-body imaging may show characteristic findings in functioning, metastatic differentiated thyroid carcinoma. Nonthyroidal tumor uptake of I- 131 is rare, but may mislead the physician to inappropriate treatment. A case is reported of a 59-year-old woman with papillary thyroid carcinoma who demonstrated strong uptake of I-131 in an abdominal cystic neurilemoma. Her serum thyroglobulin concentration at that time was low, at 3.35 ng/ml. Although the concentrating mechanism of I-131 was not clear, several clues pointed to the possibilities of nonthyroidal tumor uptake: 1) faster clearing of radioactivity than usual thyroid tissue, 2) persistent low serum thyroglobulin concentration, and 3) the presence of a cystic component in the nonthyroidal tumor.

Original languageEnglish
Pages (from-to)964-966
Number of pages3
JournalClinical Nuclear Medicine
Volume18
Issue number11
DOIs
StatePublished - 1993
Externally publishedYes

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