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  • Title: Addition of an iliac/obturator lymph node dissection does not improve nodal recurrence or survival in melanoma.
    Author: Egger ME, Brown RE, Roach BA, Quillo AR, Martin RC, Scoggins CR, Stromberg AJ, McMasters KM.
    Journal: J Am Coll Surg; 2014 Jul; 219(1):101-8. PubMed ID: 24726566.
    Abstract:
    BACKGROUND: Controversy exists regarding the value and indications for inguinal dissection alone or in combination with an iliac/obturator lymph node dissection for melanoma. STUDY DESIGN: We reviewed patients from a multicenter prospective clinical trial and a single center who underwent inguinal dissection alone or combined with an iliac/obturator dissection for cutaneous melanoma. Analyses were stratified and compared by microscopic or macroscopic (palpable or detected by imaging) disease. RESULTS: The study was composed of 134 patients with a median follow-up of 39 months. Indications for inguinal dissection were microscopic disease in 94 (70%) patients and macroscopic nodal disease in 40 (30%) patients. An iliac/obturator dissection yielded tumor-positive pelvic nodes in 25% vs 55% in the microscopic vs macroscopic groups, respectively (p = 0.10). No risk factors for positive pelvic nodes were identified. For both microscopic and macroscopic disease, addition of an iliac/obturator dissection to an inguinal dissection did not significantly reduce the risk of pelvic nodal recurrence. Five-year overall survival rates for 4 groups were compared: microscopic disease, inguinal dissection alone (72%); microscopic disease, iliac/obturator dissection (68%); macroscopic disease, inguinal dissection alone (51%); and macroscopic disease, iliac/obturator dissection (44%) (p = 0.0163). On survival analysis, addition of an iliac/obturator dissection in either microscopic or macroscopic disease did not affect disease-free survival or regional lymph node recurrence-free survival. CONCLUSIONS: The addition of an iliac/obturator dissection to an inguinal dissection for both microscopic and macroscopic nodal disease did not significantly affect lymph node recurrence rates, disease-free survival, or overall survival.
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