Elective versus Therapeutic Neck Dissection in Node-Negative Oral Cancer

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Abstract

Whether patients with early-stage oral cancers should be treated with elective neck dissection at the time of the primary surgery or with therapeutic neck dissection after nodal relapse has been a matter of debate.

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Elective versus therapeutic neck dissection in early carcinoma of the oral tongue.

A R Fakih, R S Rao, A M Borges … (1989)

A prospective, randomized trial was carried out to assess the value of elective versus therapeutic neck dissection in early squamous cell carcinoma of the oral tongue. Disease-free survival (median follow-up 20 months) was 52 percent versus 63 percent in patients who underwent hemiglossectomy alone and those who underwent hemiglossectomy and radical neck dissection, respectively (difference not statistically significant). Patients with a tumor depth of less than 4 mm did significantly better than those with a tumor depth of greater than 4 mm; they were also more likely to have uninvolved nodes at elective radical neck dissection compared with those with a tumor depth of greater than 4 mm. However, when the survival rates of patients in the two treatment groups were compared with respect to a tumor depth of 4 mm, there was no significant difference between the hemiglossectomy and the hemiglossectomy and radical neck dissection groups. A policy of interval elective radical neck dissection only in those with a tumor depth of greater than 4 mm may optimize cure rates and avoid neck dissection in those unlikely to develop neck recurrence.

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Prospective randomized study of selective neck dissection versus observation for N0 neck of early tongue carcinoma.

Tam-Lin Chow, Raymond Wai-Man Ng, Tzy-Jyun Yao … (2009)

There are controversies on the benefits of elective neck dissection (END) for oral tongue carcinoma. This is a prospective randomized study of elective selective I, II, III neck dissection versus observation for N0 neck of stage I to II oral tongue carcinoma. There were 35 patients on the observation arm and 36 patients on the END arm. The main outcome assessment parameters are node-related mortality and disease-specific survival rate. There were 11 patients in the observed arm and 2 patients in the END arm who developed nodal recurrence alone without associated local or distant recurrence. All 13 patients were salvaged, and no patient died of nodal recurrence. The 5-year disease-specific survival rate was 87% for the observation arm and was 89% for the END arm; the 2% difference was not significant. Observation may be an acceptable alternative to END if strict adherence to a cancer surveillance protocol is followed. (c) 2009 Wiley Periodicals, Inc.

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A meta-analysis of the randomized controlled trials on elective neck dissection versus therapeutic neck dissection in oral cavity cancers with clinically node-negative neck.

Brett Werner, Sandra B Greene, Susanne Wiegand … (2011)

There is still no consensus on the optimal treatment of the neck in oral cavity cancer patients with clinical N0 neck. The aim of this study was to assess a possible benefit of elective neck dissection in oral cancers with clinical N0 neck. A comprehensive search and systematic review of electronic databases was carried out for randomized trials comparing elective neck dissection to therapeutic neck dissection (observation) in oral cancer patients with clinical N0 neck. A meta-analysis of the studies which met our defined selection criteria was performed using disease-specific death as the primary outcome, and the relative risk (RR) of disease-specific death was calculated for each of the identified studies. Both fixed-effects (Mantel-Haenszel method) and random-effects models were applied to obtain a combined RR estimate, although between-study heterogeneity was not found to be significant as indicated by an I(2) of 8.5% (p=0.350). Four studies with a total of 283 patients met our inclusion criteria. The results of the meta-analysis showed that elective neck dissection reduced the risk of disease-specific death (fixed-effects model RR=0.57, 95% CI 0.36-0.89, p=0.014; random-effects model RR=0.59, 95% CI 0.37-0.96, p=0.034) compared to observation. This reduction in disease-specific death rate supports the need to perform elective neck dissection in oral cancers with clinical N0 neck. Copyright © 2011 Elsevier Ltd. All rights reserved.