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KMID : 1103720090600060383
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Journal of the Korean Society of Radiology
2009 Volume.60 No. 6 p.383 ~ p.389
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Diagnostic Value of CT for the Detection of Cervical Lymph Node Metastases in Papillary Thyroid Carcinoma
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Son Kyu-Ri
Na Dong-Gyu
Chang Kee-Hyun
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Abstract
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Purpose: To determine the diagnostic accuracy of CT for the detection of cervical lymph node metastases in patients with papillary thyroid carcinoma (PTC).
Materials and Methods: Two hundred twelve consecutive patients with surgically proven PTC were included in this study. CT images were retrospectively evaluated to determine the presence of a node metastasis using morphologic CT criteria (at least one of the following: strong nodal enhancement without hilar vessel enhancement, heterogeneous enhancement, calcification, and cystic change). The diagnostic accuracy of CT for the diagnosis of a metastatic lymph node was assessed using a level-bylevel analysis.
Results: The accuracy of the CT finding for strong nodal enhancement was greater than the other morphologic CT criteria (81.6% and 74.5-78.5%, respectively). The sensitivity, specificity, and accuracy were 64.4%, 91.4%, and 84.3% by the morphologic CT criteria, and were 34.6%, 93.9%, and 78.2% by size criteria, respectively.
Conclusion: The morphologic CT criteria are more accurate than the size criteria in the detection of cervical lymph node metastases in patients with papillary thyroid carcinoma; and, strong nodal enhancement on a CT scan is the most important factor for its diagnostic accuracy.
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KEYWORD
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Thyroid neoplasms, Papillary carcinoma, Head and neck neoplasms, metastases, Tomography, X-ray computed
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