Retrospective analysis for predictors of parametrial involvement in IB cervical cancer

AIM The use of less radical surgery for early stage cervical cancer has often been discussed. To better determine eligible candidates for less radical surgery, we investigated the risk factors for parametrial involvement (PI). METHODS The study included 193 patients with International Federation of Gynecology and Obstetrics (FIGO) stage IB cervical cancer who were treated with radical hysterectomy and pelvic lymphadenectomy between 2008 and 2014. The patients were divided into two groups according to whether or not the parametrium was involved pathologically. The two groups were compared with regards to clinical and histopathological variables. RESULTS Univariate analysis showed that International Federation of Gynecology and Obstetrics stage, clinical tumor size, depth of stromal invasion, lymphovascular space invasion and pelvic lymph node metastasis were significantly associated with PI (P < 0.05 each). Multivariate analysis showed pelvic lymph node metastasis was an independent risk factor for PI (odds ratio, 10.70; [95% confidence interval, 3.02-48.08]; P = 0.0006). All patients with clinical tumor size less than or equal to 2 cm and negative for pelvic lymph node metastasis had no PI. CONCLUSION Cervical cancer with the tumor less than or equal to 2 cm and negative for pelvic lymph node metastasis seldom has PI. These patients are good candidates for less radical surgery.