Prognostic Factors and Local Treatment Modalities of Small-Cell Carcinoma of the Cervix: An Analysis According to the International Federation of Gynecology and Obstetrics Stage.

ABSTRACT

PURPOSE: Small-cell carcinoma of the cervix (SCCC) is a rare type of cervical cancer. This study aimed to investigate the clinicopathological characteristics and survival as well as the optimal local treatment modalities for SCCC. PATIENTS AND METHODS: We retrospectively evaluated the data of patients diagnosed with SCCC between 1988 and 2015 in our institution - those included in the Surveillance, Epidemiology, and End Results (SEER) database and those in the Periodical Database. Kaplan-Meier method and Cox regression proportional hazard methods were used to evaluate overall survival (OS). A nomogram that could predict OS was constructed based on the Cox proportional hazard model. RESULTS: In total, 695 patients were included in this study. The 5-year overall survival in FIGO stage I-IIA and IIB-IV patients was 45.7% and 14.4%, respectively (P <0.01). Univariate and multivariate analyses showed that lymph node status (P <0.01) and cancer-directed surgery (P <0.01) were independent prognostic factors for FIGO I-IIA stage patients, and age (P <0.05), tumor size (P <0.01), chemotherapy (P <0.01) and radiation (P <0.01) were independent prognostic factors for FIGO stage IIB-IV patients. CONCLUSION: Better prognosis was associated with negative lymph node status, no lymphatic vasculature, surgery, and early-stage patients. Furthermore, our data showed that the prognosis and treatment pattern varied depending on the FIGO stage, and that optimal treatment modalities included radical surgery for early-stage SCCC and chemoradiotherapy for advanced-stage SCCC. It is helpful to assess the individual prognosis of SCCC patients and choose personalized treatment modalities.