Histopathological factors affecting nodal metastasis in tongue cancer: analysis of 94 patients in Taiwan.

The overall prognosis for tongue cancer patients in Taiwan is unpredictable, even when patients are treated following the guidelines according to TNM stages. In order to determine the optimal treatment modality for tongue cancer in Taiwan the authors aimed to correlate histopathological parameters with neck nodal metastasis. A retrospective analysis of 94 patients with different stages of tongue cancer treated in the Taipei Veterans General Hospital was performed. All 94 patients were clinically diagnosed with stage I-IV tongue cancer before surgery and received primary tumor-wide excision and neck dissection. There were 42 (45%) patients with nodal metastasis. Univariate analysis revealed that cases of tongue cancer with moderate or poor differentiation, an invasion depth more than 3mm and positive perineural invasion or lymphovascular permeation at the time of presentation may be subject to a higher incidence of neck nodal metastasis. An elective neck dissection or neck treatment should be considered if these histopathological risk factors are present. Cases of tongue cancer with these risk factors also warrant close follow-up after surgery.