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- Title
Localization and identification of parapharyngeal metastases from differentiated thyroid carcinoma by.
- Authors
Zhong-Ling Qiu; Yan-Hong Xu; Hong-Jun Song; Quan-Yong Luo
- Abstract
Background. Parapharyngeal metastasis is a rare event in differentiated thyroid carcinoma (DTC). The 131I-single photon emission CT (SPECT)/CT allows better localization and definition for metastases in DTC. The aim of this study was to assess the value of 131I-SPECT/CT for the diagnosis of parapharyngeal metastasis in patients with DTC. Methods. Consecutive patients with DTC (n = 561) treated with 131I for the ablation of remnant or treatment of metastases were enrolled. A 131I-SPECT/CT was performed when there were abnormal findings indicative of parapharyngeal metastasis on 131I-whole-body scan (WBS). Results. A total of 15 lesions were found to be parapharyngeal metastasis in 14 of 561 patients with DTC after the use of 131I-SPECT/CT. The incidence rate of parapharyngeal metastasis was about 2.5% in DTC. Of the 15 lesions, only 5 lesions were CT-positive. The remaining 10 lesions were either ignored or indeterminate by the CT alone. Conclusion. The 131I-SPECT/CT can identify parapharyngeal metastasis at an early stage. Parapharyngeal metastasis in DTC is relatively frequent after the use of 131I-SPECT/CT.
- Subjects
METASTASIS; THYROID cancer; PHARYNGEAL cancer; SINGLE photon emission computerized tomography centers; THYROTROPIN; PHOTON emission
- Publication
Head & Neck, 2011, Vol 33, Issue 2, p171
- ISSN
1043-3074
- Publication type
Article
- DOI
10.1002/hed.21416