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Established prognostic variables in N0 oral carcinoma
Jonathan R Clark1, Natalie Naranjo, Jason H Franklin
1Department of Otolaryngology-Head and Neck Surgery, Princess Margaret Hospital, University of Toronto, Toronto, Canada. jcjc@tpg.com.au
Summary
Tumor thickness is a key factor in oral cancer metastasis. Thick tumors (>5 mm) significantly increase the risk of occult neck metastases, suggesting a benefit from elective neck dissection.
Area of Science:
- Oncology
- Head and Neck Surgery
Background:
- Oral carcinoma prognosis is influenced by various factors.
- Accurate assessment of nodal status is crucial for treatment planning in clinically negative necks.
Purpose of the Study:
- To evaluate prognostic variables in oral cancer patients with clinically negative necks.
- To identify predictors of occult metastases, recurrence, and survival.
Main Methods:
- Retrospective cohort study of 105 oral cancer patients.
- Assessed distribution of occult metastases in clinically and radiologically node-negative patients.
- Examined predictors for nodal metastases, recurrence, and survival.
Main Results:
- Occult neck metastases were found in 34% of patients.
- Tumor thickness was the sole independent predictor of occult metastases (thin tumors ≤5 mm: 10% incidence; thick tumors >5 mm: 46% incidence; P=0.001).
- Nodal metastases and perineural invasion significantly predicted survival.
Conclusions:
- Thick-tumor patients face high risk of nodal metastases, benefiting from elective neck dissection.
- Comprehensive neck dissection is recommended for advanced primary oral disease.
- Tumor thickness is the primary predictor of occult regional metastases in oral cancer.
