title: Invited commentary.
authors: Thoracic Surgery, Yale School of Medicine, 330 Cedar St, FMB 128, New Haven, CT 06520-8062, USA. daniel.boffa@yale.edu
authors: Daniel J
authors: DJ
authors: Boffa
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology / Q000556:secondary*; D004938:Esophageal Neoplasms / Q000473:pathology*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D009367:Neoplasm Staging / Q000592:standards*; D015203:Reproducibility of Results; D014481:United States