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Is preoperative ultrasonography accurate in measuring tumor thickness and predicting the incidence of cervical metastasis in oral cancer?
Oral Oncology , 11/25/09

Taylor MS et al. – Preoperative ultrasonography is an accurate measure of tumor depth in oral carcinoma. Tumor thickness is a significant predictor of nodal metastasis and elective neck dissection should be considered when this thickness is ≥ 5mm.

Methods

21 consecutive patients with biopsy proven squamous cell carcinoma of tongue/floor of mouth analyzed prospectively
Each patient received preoperative ultrasonography to assess tumor depth which was compared to histological measures
Univariate analysis used to correlate tumor thickness and T stage with neck metastasis

Results

Significant correlation between preoperative ultrasonography and histological measures of tumor depth (correlation coefficient 0.981)
Overall rate of lymph node metastasis was 52%
Rate of metastasis 33% in N0 necks
In group with tumors<5mm in depth, neck metastatic rate was 0%, as compared with 65% in group ≥ 5mm
Using univariate analysis tumor depth and T stage significant predictors of cervical metastasis

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