Tumor size,depth of invasion,and histologic grade as prognostic factors of lymph node involvement in endometrial cancer: A SEER analysis |
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Authors: | Roberto Vargas J. Alejandro Rauh-Hain Joel Clemmer Rachel M. Clark Annekathryn Goodman Whitfield B. Growdon John O. Schorge Marcela G. del Carmen Neil S. Horowitz David M. Boruta II |
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Affiliation: | 1. Division of Gynecologic Oncology, Vincent Obstetrics and Gynecology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA;2. Division of Gynecologic Oncology, Brigham and Women''s Hospital, Harvard Medical School, Boston, MA, USA |
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Abstract: | ObjectivesThe objective of this investigation was to evaluate the risk of nodal metastasis in patients with endometrial cancer, using the Mayo criteria, in a population-based analysis.Materials and methodsData from the SEER registry was reviewed for endometrial cancer cases diagnosed between 1988 and 2010. Patients were considered at low-risk for nodal metastasis if their tumors were histologic grade 1 or 2, myometrial invasion was less than 50%, and tumor size equal to or less than 2 cm. Patients not meeting these criteria were considered at high-risk for nodal involvement.ResultsThe final study group consisted of 19,329 women with surgically staged endometrial cancer. Of these, 1035 (5.3%) had lymph node involvement. Based on Mayo criteria, 4095 (21.1%) patients were found to be at low-risk and 15,234 (78.9%) at high-risk for nodal metastasis. Low-risk features were associated with a 1.4% risk for lymph node metastasis, compared to 6.4% in patients with high-risk features (p < 0.001). When myometrial invasion was removed from the analysis, low-risk pathologic features were associated with a 2.4% risk of lymph node metastasis, compared to 10.4% in patients with high-risk features (p < 0.001).ConclusionsIn a population-based analysis, women with low-risk endometrial cancer, as defined by the Mayo criteria, have a low rate of lymph node metastasis. |
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Keywords: | Endometrial neoplasms Lymph node excision |
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