If patients have any of the following, pelvic and para-aortic lymphadenectomy is also done (unless SLN mapping identified bilateral SLNs): Grade 1 or 2 cancer with deep (> 50%) myometrial invasion Any grade 3 cancer All cancers with high-risk histology (papillary serous carcinoma, clear cell carcinoma, carcinosarcoma) Any suspicious or grossly enlarged nodes, regardless of mapping If SLNs are identified bilaterally, no lymphadenectomy is indicated, regardless of tumor characteristics.