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Erschienen in: Annals of Surgical Oncology 1/2008

01.01.2008 | Endocrine Tumors

Combined [18F]Fluorodeoxyglucose Positron Emission Tomography and Computed Tomography (FDG-PET/CT) for Detection of Recurrent, 131I-Negative Thyroid Cancer

verfasst von: Steven E. Finkelstein, MD, Perry W. Grigsby, MD, Barry A. Siegel, MD, Farrokh Dehdashti, MD, Jeffrey F. Moley, MD, Bruce L. Hall, MD, PhD

Erschienen in: Annals of Surgical Oncology | Ausgabe 1/2008

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Abstract

Background

Whole-body 131I scintigraphy (WBS) and serial thyroglobulin measurement (Tg) are standard methods for detecting thyroid cancer recurrence after total/near total thyroidectomy and 131I ablation. Some patients develop elevated Tg (Tg-positive) or there is clinical suspicion of recurrence, but WBS are negative (WBS-negative). This may reflect non-iodine-avid recurrence or metastasis. In 2002, the Centers for Medicare and Medicaid Services (CMS) approved positron emission tomography with [18F]fluorodeoxyglucose (FDG-PET) for Tg-positive/WBS-negative patients with follicular-cell-origin thyroid cancer. Limited data are available regarding the performance of combined FDG-PET/computed tomography (FDG-PET/CT) for detecting recurrent thyroid cancer in WBS-neg patients.

Methods

This retrospective review of prospectively collected data analyzed 65 patients who had FDG-PET/CT for suspected thyroid cancer recurrence (April 1998–August 2006). Patients were WBS-negative but were suspected to have recurrence based on Tg levels or clinical grounds. Suspected FDG-PET/CT abnormalities were reported as benign or malignant. Lesions were ultimately declared benign or malignant by surgical pathology or clinical outcome (disease progression).

Results

Of 65 patients who underwent FDG-PET/CT, 47 had positive FDG-PET/CT. Of the positive FDG-PET/CT, 43 studies were true positives, with 21 (49%) confirmed pathologically by surgical resection. The four false positives (3/4 confirmed pathologically) included an infundibular cyst, an inflamed supraclavicular cyst, pneumonitis, and degenerative disc disease. Of the 18 FDG-PET/CT studies that were negative, 17 were true negatives and one was a false negative (metastatic papillary carcinoma). Thus, FDG-PET/CT demonstrated a patient-based sensitivity of 98%, specificity of 81%, positive predictive value of 91%, and negative predictive value of 94%.

Conclusions

FDG-PET/CT is useful for detecting thyroid cancer recurrence in WBS-negative patients, and can assist decision making.
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Metadaten
Titel
Combined [18F]Fluorodeoxyglucose Positron Emission Tomography and Computed Tomography (FDG-PET/CT) for Detection of Recurrent, 131I-Negative Thyroid Cancer
verfasst von
Steven E. Finkelstein, MD
Perry W. Grigsby, MD
Barry A. Siegel, MD
Farrokh Dehdashti, MD
Jeffrey F. Moley, MD
Bruce L. Hall, MD, PhD
Publikationsdatum
01.01.2008
Verlag
Springer-Verlag
Erschienen in
Annals of Surgical Oncology / Ausgabe 1/2008
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-007-9611-5

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