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Japanese Journal of Clinical Oncology Advance Access published online on July 26, 2006
Japanese Journal of Clinical Oncology, doi:10.1093/jjco/hyl066
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© 2006 Foundation for Promotion of Cancer Research
Received December 6, 2005
Accepted May 11, 2006

Original Article

Can We Omit Para-Aorta Lymph Node Dissection in Endometrial Cancer?

Hidenori Tanaka 1 *, Hirokazu Sato 1, Hiroshi Miura 1, Naoki Sato 1, Toshio Fujimoto 1, Yoshitomo Konishi 1, Osamu Takahashi 1, and Toshinobu Tanaka 1

1 Department of Obstetrics and Gynecology, Akita University School of Medicine, Akita, Japan

* To whom correspondence should be addressed.
Hidenori Tanaka, E-mail: tanakah{at}obgyn.med.akita-u.ac.jp


  Abstract

Background: Patients with endometrial cancer can present with various complicating illnesses, including obesity, diabetes mellitus, hypertension and advanced aging. These patients are at high risk of severe post-operative complications. Thus, the question of whether or not to perform systemic pelvic and para-aortic lymphadenectomy remains controversial for all patients. It is reported that external iliac lymph nodes are the most commonly involved lymph nodes in endometrial cancer, and para-aortic lymph node (PAN) metastases spread via a route shared by the common iliac lymph nodes. The aim of this study was to evaluate the potential efficacy of omitting PAN dissection when metastasis of the common iliac and external iliac lymph nodes is negative.

Methods: Between January 1994 and June 2004, a total of 101 patients at Akita University Hospital who had undergone total hysterectomy and bilateral salpingo-oophorectomy, total pelvic lymphadenectomy and para-aortic lymphadenectomy to the level of the renal vein for endometrial cancer were enrolled in this study.

Results: Eleven patients in all were found to have metastasis for PANs. Among 13 patients with common and/or external iliac positive lymph nodes, 10 showed PAN metastasis. Of the 88 patients with negative lymph nodes, 87 showed no PAN metastasis. Based on these data, common and/or external iliac lymph nodes had 90.9% sensitivity (10/11) and 96.7% specificity (87/90) for detecting PAN metastasis.

Conclusion: Para-aortic lymphadenectomy might be avoided by the negativity of such lymph nodes, thereby minimizing post-operative complications.

Keywords: endometrial cancer; systemic pelvic and para-aortic lymphadenectomy.
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