European Journal of Gynaecological Oncology (EJGO) is published by IMR Press from Volume 40 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with S.O.G.
What is the number of lymph nodes required for an "adequate" pelvic lymphadenectomy?
Purpose of investigation: To establish a definition of an adequate number of lymph nodes identified at a pelvic lymphadenectomy through statistical methods. Methods: We conducted a retrospective study in cervical and endometrial carcinoma patients who underwent radical or staging surgery. The Student’s t-test, Pearson’s correlation, analysis of variance, and linear regression analysis were used. Results: Five hundred and ninety four-sided pelvic lymphadenectomies were analyzed. The mean (range) number of pelvic lymph nodes identifed was 11.3 (0-42). The 1th, 5th and 10th percentiles were three, five, and six lymph nodes respectively. The number of lymph nodes was higher in the laparoscopic approach compared to laparotomy (11.9 vs 10.6, p < 0.01). Conclusions: The number of lymph nodes identified at a pelvic lymphadencetomy vary with type of surgery. We propose that using the 1th, 5th or 10th percentile is reasonable for the definition of an adequate number of lymph nodes to be identified at a pelvic lymphadenectomy.