比较I型和II型上皮性卵巢癌（OC）淋巴转移的预后，并确定盆腔淋巴结转移（PLN）和副主动脉淋巴结转移（PALN）的风险因素。从观察流行病学和最终结果（SEER）数据库中收集被诊断为上皮性OC的患者。估计总体生存率（OS）和癌症特异性生存率（CSS）。使用Cox比例风险回归模型来确定独立的生存预测因子。共有11,275例OC患者入组，其中31.2%为I型，68.8%为II型。II型和高肿瘤分期是淋巴结累及的风险因素（p < 0.05）。I型患者淋巴结转移率总体为11.8％，而II型为36.7％。在I型组中，T1、T2、T3和TXM1阶段的淋巴结转移率分别为3.2％、14.5％、40.4％和50.0％。而在II型组中，这些率分别为6.4％、20.4％、54.1％和61.1％。年龄和肿瘤大小对淋巴结转移的影响较小，而3级分化并不总是风险因素。对于I型组，LN (-)、PLN（+）、PALN（+）和PLN + PALN（+）的10年CSS率分别为80.6％、46.6％、36.3％和32.3％。I型组PLN（+）的预后优于PALN（+）（p> 0.05）。对于II型组，LN (-)、PLN（+）、PALN（+）和PLN + PALN（+）的10年CSS率分别为55.6％、18.5％、25.7％和18.2％。在II型组中，PALN（+）的预后优于PLN（+）（p < 0.05）。I型和II型患者的临床特征和预后有很大差异。II型和肿瘤分期较高的患者的预后较差。I型PALN转移和II型PLN转移表明预后较差。TI期患者不需要淋巴结清扫，特别是在I型患者中。©2023年作者。

To compare the prognosis of lymphatic metastasis in type I and type II epithelial ovarian cancer (OC) and to identify the risk factors for pelvic lymph node metastases (PLNs) and para-aortic lymph node metastases (PALNs).Patients diagnosed with epithelial OC were collected from the Surveillance, Epidemiology, and End Results (SEER) database. Overall survival (OS) and cancer-specific survival (CSS) were estimated. The Cox proportional hazards regression model was used to identify independent predictors of survival.A total of 11,275 patients with OC were enrolled, including 31.2% with type I and 68.8% with type II. Type II and high tumour stage were risk factors for lymph node involvement (p < 0.05). The overall rate of lymph node metastasis in type I was 11.8%, and that in type II was 36.7%. In the type I group, the lymph node metastasis rates in stages T1, T2, T3 and TXM1 were 3.2%, 14.5%, 40.4% and 50.0%, respectively. In the type II group, these rates were 6.4%, 20.4%, 54.1% and 61.1%, respectively. Age and tumour size had little effect on lymph node metastasis, and grade 3 was not always a risk factor. For the type I group, the 10-year CSS rates of LN(-), PLN( +), PALN( +), and PLN + PALN( +) were 80.6%, 46.6%, 36.3%, and 32.3%, respectively. The prognosis of PLN ( +) was better than that of PALN ( +) in the type I group (p > 0.05). For the type II group, the 10-year CSS rates of LN(-), PLN( +), PALN( +), and PLN + PALN( +) were 55.6%, 18.5%, 25.7%, and 18.2%, respectively. PALN ( +) had a significantly better prognosis than PLN ( +) in the type II group (p < 0.05).The clinical characteristics and prognoses of patients with type I and type II OC differed greatly. Patients with type II and higher tumour stages had poorer prognoses. Type I with PALN metastasis and type II with PLN metastasis indicated a worse prognosis. Patients with stage TI did not require lymph node dissection, especially in the type I group.© 2023. The Author(s).