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Research ArticleHead & Neck

Radiology Reports for Incidental Thyroid Nodules on CT and MRI: High Variability across Subspecialties

A.T. Grady, J.A. Sosa, T.P. Tanpitukpongse, K.R. Choudhury, R.T. Gupta and J.K. Hoang
American Journal of Neuroradiology February 2015, 36 (2) 397-402; DOI: https://doi.org/10.3174/ajnr.A4089
A.T. Grady
aFrom the Departments of Radiology (A.T.G., T.P.T., K.R.C., R.T.G., J.K.H.)
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J.A. Sosa
bSurgery (J.A.S.)
dDuke Cancer Institute (J.A.S.)
eDuke Clinical Research Institute (J.A.S.), Duke University Medical Center, Durham, North Carolina.
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T.P. Tanpitukpongse
aFrom the Departments of Radiology (A.T.G., T.P.T., K.R.C., R.T.G., J.K.H.)
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K.R. Choudhury
aFrom the Departments of Radiology (A.T.G., T.P.T., K.R.C., R.T.G., J.K.H.)
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R.T. Gupta
aFrom the Departments of Radiology (A.T.G., T.P.T., K.R.C., R.T.G., J.K.H.)
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J.K. Hoang
aFrom the Departments of Radiology (A.T.G., T.P.T., K.R.C., R.T.G., J.K.H.)
cRadiation Oncology (J.K.H.)
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    Fig 1.

    Flowchart of study patients. FNA indicates fine needle aspiration.

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    Fig 2.

    Source of imaging studies with reported incidental thyroid nodules.

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    Fig 3.

    Three patients with incidental thyroid nodules that were similar in size but were reported differently. A, A 46-year-old man with a 12-mm incidental nodule in the left thyroid lobe detected on chest CTA performed to evaluate an abdominal aortic aneurysm. The nodule was reported only in the “Findings” section of the report without a recommendation. B, A 47-year-old woman with a 10-mm incidental nodule in the right thyroid lobe detected on chest CTA performed to evaluate chest pain. The nodule was reported in the “Impression” section without a recommendation. C, A 63-year-old man with several incidental thyroid nodules detected on cervical spine CT performed to evaluate neck injury. The largest was in the left thyroid lobe and measured 10 mm. The nodule was reported in the “Impression” section with a recommendation for sonography.

Tables

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  • The Duke 3-tiered system for CT, MRI, or PET-detected thyroid nodules1,13,14,a

    CategoryCriteria for CategoriesRecommendations
    Risk category 1: highly suspicious for malignancyPET avid thyroid noduleStrongly consider work-up with ultrasound for any size nodule
    Suspicious lymphadenopathy;b extrathyroid spread with or without signs of vocal cord palsy on side of nodule; lung metastases
    Risk category 2: indeterminate with risk factor of young ageAge younger than 35 yearsConsider work-up with ultrasound if ≥1 cm in adults
    Consider work-up with ultrasound for any size in pediatric patients
    Risk category 3: indeterminate without risk factorsAge 35 years or olderConsider work-up with ultrasound if ≥1.5 cm
    • ↵a Intended for management of incidental thyroid nodules in low-risk patients.

    • ↵b Suspicious lymph nodes are defined as nodes >10 mm in the short axis (with the exception of jugulodigastric lymph nodes, which are permitted to be up to 15 mm in the short axis) or nodes that contain either calcifications, cystic components, or irregular margins.

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American Journal of Neuroradiology: 36 (2)
American Journal of Neuroradiology
Vol. 36, Issue 2
1 Feb 2015
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Cite this article
A.T. Grady, J.A. Sosa, T.P. Tanpitukpongse, K.R. Choudhury, R.T. Gupta, J.K. Hoang
Radiology Reports for Incidental Thyroid Nodules on CT and MRI: High Variability across Subspecialties
American Journal of Neuroradiology Feb 2015, 36 (2) 397-402; DOI: 10.3174/ajnr.A4089

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Radiology Reports for Incidental Thyroid Nodules on CT and MRI: High Variability across Subspecialties
A.T. Grady, J.A. Sosa, T.P. Tanpitukpongse, K.R. Choudhury, R.T. Gupta, J.K. Hoang
American Journal of Neuroradiology Feb 2015, 36 (2) 397-402; DOI: 10.3174/ajnr.A4089
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