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KMID : 1202020090020010007
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Journal of Korean Thyroid Association
2009 Volume.2 No. 1 p.7 ~ p.14
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Recent Update in Diagnosis of Metastatic Lymph Nodes in Patients with Thyroid Carcinoma: Radiological Diagnosis
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Na Dong-Gyu
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Abstract
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The preoperative accurate diagnosis of metastatic lymph nodes is important for the optimal surgical management in patients with thyroid carcniomas. Ultrasonography (US) is an imaging modality of choice for the diagnosis of metastatic lymph nodes. Ultrasound-guided fine needle aspiration cytology (FNAC) is a very useful technique with a high specificity for metastatic nodes. Combination of FNAC and thyroglobulin assessment in needle washout fluid provides higher sensitivity and accuracy for detection of metastatic lymph nodes from differentiated thyroid carcinomas compared to FNAC alone. Routine preoperative use of contrast enhanced CT or MRI is not recommend and the role of CT is controversial. CT may provide additional benefit for detecting metastatic nodes in some patients, and may has a complementary role for the diagnosis of metastatic nodes in patients with thyroid carcinomas.
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KEYWORD
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Thyroid neoplasm, Lymphatic metastasis, Ultrasonography, Fine-Needle aspiration
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