Focal F-18 Fluorodexyglucose Positron Emission Tomography Uptake in a Hyalinized Nodule as a False Positive Splenic Metastasis in a Patient with Breast Cancer and Metastatic Thyroid Cancer

A 69-year-old woman diagnosed with papillary thyroid carcinoma was treated with total thyroidectomy and radioiodine ablation. At follow-up a whole body I-131 scan after injection of rhTSH was performed. This scan shows unexpected uptake in the superior mediastinum, initially misinterpreted as metastases (Tg level: 6.8 ng/mL). CT and digital subtraction angiography (DSA) confirmed that this finding was due to an aortic aneurysm. This vascular malformation was embolized and endoprosthesis was performed using a Seldinger's technique.

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I-131 Visualization of Thoracic Aortic Aneurysm After Radioiodine Administration for Thyroid Carcinoma

Bares

Casas

Ortega

et al. 2008

Clinical Nuclear Medicine

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Focal F-18 Fluorodexyglucose Positron Emission Tomography Uptake in a Hyalinized Nodule as a False Positive Splenic Metastasis in a Patient with Breast Cancer and Metastatic Thyroid Cancer

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I-131 Visualization of Thoracic Aortic Aneurysm After Radioiodine Administration for Thyroid Carcinoma

I-131 Visualization of Thoracic Aortic Aneurysm After Radioiodine Administration for Thyroid Carcinoma

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