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Dentomaxillofacial Radiology, Vol 30, Issue 5 242-245, Copyright © 2001 by British Institute of Radiology

ARTICLES

The relationship of primary tumor thickness in carcinoma of the tongue to subsequent lymph node metastasis

T. Hayashi, J. Ito, S. Taira and K. Katsura
Division of Oral and Maxillofacial Radiology, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Japan.

OBJECTIVES: To study whether primary tumor thickness of stage I/II tongue carcinoma provides information about subsequent lymph node metastasis. METHODS: Twenty consecutive patients with T1N0M0 or T2N0M0 tongue carcinoma were studied. Primary tumor thickness was measured with post-contrast helical computed tomography or intra-oral sonography. Cervical lymph nodes were evaluated periodically with sonography at intervals of 2-4 weeks. Sensitivity, specificity and accuracy for subsequent metastasis was calculated. RESULTS: Positive sonographic findings appeared in nine nodes of nine patients during this follow-up period. Eleven patients underwent neck dissections, and nine had histopathologically positive nodes. Nine patients had no sonographic findings of metastasis during a minimum follow-up period of 20 months. Primary tumor thickness varied from 3-16 mm. Using 5 mm as a cut-off thickness, the sensitivity, specificity and accuracy for subsequent lymph node metastasis were 64, 100 and 75% respectively. CONCLUSIONS: Patients with stage I/II tongue carcinoma which is more than 5 mm thick are more likely to develop lymph node metastasis.


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