Elective lymph-node dissection for melanoma.
D008197:Lymph Node Excision; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis / Q000453:epidemiology / Q000601:surgery; D008545:Melanoma / Q000175:diagnosis / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D011379:Prognosis