Evaluating the rational extent of dissection in radical esophagectomy for invasive carcinoma of the thoracic esophagus.

To define the rational extent of dissection in radical esophagectomy for esophageal cancer, survival was studied according to nodal status in 154 patients undergoing extended radical esophagectomy. The incidence of cervical metastasis in patients with upper or middle esophageal tumors did not differ between those with favorable (grade N < or = 4) or unfavorable (grade N > or = 5) lymph node status, at 28.6% vs 20%, respectively. On the other hand, in patients with lower esophageal tumors, the incidence of cervical metastasis was significantly lower in those with favorable grade (grade N < or = 4) node status than in those with unfavorable grade (grade N > or = 5) node status, at 6.5% vs 46.7%, respectively. Survival did not differ in patients with upper or middle esophageal tumors according to whether they had regional (n = 42) or distant (n = 15) lymph node metastases, the 5-year survival rates being 11.6% vs 25%, respectively. However, in patients with lower esophageal tumors, none of 10 patients with distant node metastases survived for more than 4 years, whereas the survival rate was 43.7% at 5 years for 36 patients with regional node metastases. These results show that cervical lymphadenectomy should only be performed as part of radical esophagectomy in those patients with upper or middle esophageal cancer.