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PET in the follow-up of differentiated thyroid cancer

Department of Nuclear Medicine & Diagnostic Radiology, Gunma University, Faculty of Medicine, 3-39-22 Showamachi, Maebashi City, Gunma 371-8511, Japan

View larger version (55K): [in a new window]   Figure 1. (a) FDG-positive local recurrence (arrow) in a 49-year-old man who presented with negative I-131 scan after thyroidectomy and two courses of radioiodine treatment of papillary thyroid cancer initially staged as T2bN0M0. (b) No tumour remnants were seen after further operation and (c) during follow-up. Reprinted with permission of SNM from Schulter et al [37].

View larger version (87K): [in a new window]   Figure 2. (a) A 70-year-old woman with follicular thyroid carcinoma. Cervical ultrasound indicated regional lymph node metastases. To confirm this finding and to determine whether there were additional lesions, FDG PET was performed which showed hot spots in the neck, upper mediastinum, the sternum and 12th thoracic vertebra (arrow). (b) Coronal slice in a 81-year-old woman showing lymph node metastases in the neck as well as mediastinum.