Unstimulated Serum Thyroglobulin Levels after Thyroidectomy and Radioiodine Therapy for Intermediate-Risk Thyroid Cancer Are Not Always a Reliable Marker of Lymph Node Recurrence: Case Report and a Lesson for Clinicians

<div>Ultrasonographic features of second nodal recurrences (6 years after surgery and radioactive iodine 131I therapy) of papillary thyroid carcinoma (two laterocervical metastatic hypoechoic lymph nodes, 2.2 cm and 1 cm, respectively) with irregular shape, no visible hilum and focal hyperechogenicity ((a), arrows). At 18F-FDG PET/CT, both lymph nodes showed significant tracer uptake (arrows) (the larger one: SUV max: 20.7; the smaller one: SUV max: 11) (b).</div>

Case Reports in Endocrinology

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Figure 6

Figure 6: Unstimulated Serum Thyroglobulin Levels after Thyroidectomy and Radioiodine Therapy for Intermediate-Risk Thyroid Cancer Are Not Always a Reliable Marker of Lymph Node Recurrence: Case Report and a Lesson for Clinicians 

Figure 6 | Unstimulated Serum Thyroglobulin Levels after Thyroidectomy and Radioiodine Therapy for Intermediate-Risk Thyroid Cancer Are Not Always a Reliable Marker of Lymph Node Recurrence: Case Report and a Lesson for Clinicians 