MRI Features of Cervical Lymph Nodes with Radioiodine Uptake in DTC

Overview

This study characterizes MRI features of cervical lymph nodes in differentiated thyroid carcinoma (DTC) that exhibit radioiodine uptake.

Background

Differentiated thyroid carcinoma (DTC) is the most common thyroid malignancy, with cervical lymph node metastasis significantly impacting patient outcomes. Accurate identification of these metastases is crucial for optimizing radioactive iodine (¹³¹I) therapy. This study aims to clarify the MRI characteristics of lymph nodes identified as radioiodine-avid.

Data Highlights

Key Findings

• All patients were diagnosed with papillary thyroid carcinoma.
• Cervical ultrasonography detected lymph node metastasis in 15.6% of cases.
• A total of 58 radioiodine-avid lymph nodes were identified across cervical levels II–VI.
• Most radioiodine-avid lymph nodes exhibited hyperintensity on T1- and T2-weighted MRI sequences.
• In 96.9% of patients, at least 4 lymph nodes were visualized on MRI.

Clinical Implications

The findings indicate the need for accurate evaluation of cervical lymph nodes in DTC prior to ¹³¹I therapy.

Conclusion

Cervical lymph nodes with radioiodine uptake often present with specific MRI features, but overlapping characteristics with radioiodine-negative nodes necessitate careful interpretation.

Related Resources & Content

1. Frontiers in Endocrinology, 2026 -- Efficacy and safety of 125I seed implantation combined with thyroid-stimulating hormone suppression therapy in cervical lymph node metastases of differentiated thyroid carcinoma
2. The Importance of Lymph Node Location Over Quantity in Recurrence Rates and Disease-Free Survival Among Patients with Differentiated Thyroid Cancer, 2012
3. European Radiology -- Key Imaging Guidelines for Lymphoma: Recommendations from the European Society of Oncologic Imaging, 2024
4. American Thyroid Association Statement on Preoperative Imaging for Thyroid Cancer Surgery - PMC
5. A combination of computed tomography scan and ultrasound provides optimal detection of cervical lymph node metastasis in papillary thyroid carcinomas: A systematic review and meta-analysis - PubMed
6. Evaluation of Radiomics Approaches and Dual-Energy Material Decomposition for Analyzing Abdominal Lymphoma in Contrast-Enhanced CT Scans
7. American Thyroid Association Statement on Preoperative Imaging for Thyroid Cancer Surgery - PMC
8. A combination of computed tomography scan and ultrasound provides optimal detection of cervical lymph node metastasis in papillary thyroid carcinomas: A systematic review and meta-analysis - PubMed
9. Imaging of thyroid carcinoma with CT and MRI: approaches to common scenarios - PMC