Transcriptional Characterization of Stage I Epithelial Ovarian Cancer: A Multicentric Study.

Stage I epithelial ovarian cancer (EOC) represents about 10% of all EOCs. It is characterized by a complex histopathological and molecular heterogeneity, and it is composed of five main histological subtypes (mucinous, endometrioid, clear cell and high, and low grade serous), which have peculiar genetic, molecular, and clinical characteristics. As it occurs less frequently than advanced-stage EOC, its molecular features have not been thoroughly investigated. In this study, using in silico approaches and gene expression data, on a multicentric cohort composed of 208 snap-frozen tumor biopsies, we explored the subtype-specific molecular alterations that regulate tumor aggressiveness in stage I EOC. We found that single genes rather than pathways are responsible for histotype specificities and that a cAMP-PKA-CREB1 signaling axis seems to play a central role in histotype differentiation. Moreover, our results indicate that immune response seems to be, at least in part, involved in histotype differences, as a higher immune-reactive behavior of serous and mucinous samples was observed with respect to other histotypes.

Optimizing Strategies for Sentinel Lymph Node Mapping in Early-Stage Cervical and Endometrial Cancer: Comparison of Real-Time Fluorescence With Indocyanine Green and Methylene Blue.

OBJECTIVE: This retrospective study aimed to compare the sentinel lymph node (SLN) mapping results of methylene blue (MB) and indocyanine green (ICG) in women with early-stage endometrial or cervical cancer. METHODS: From August 2011 to March 2015, all consecutive patients with stage I endometrial or cervical cancer who underwent SLN mapping with intracervical injection of MB or ICG using a 22-gauge spinal needle were included in the study. Radical or simple hysterectomy with bilateral pelvic and/or aortic lymphadenectomy was performed after SLN mapping. RESULTS: Overall, 81 women (64 women with endometrial cancer and 17 women with cervical cancer) underwent surgery, including SLN mapping. Sixty-five patients (80%) underwent minimally invasive surgery. The overall detection rate was 84% (34 of 38) and 100% (43 of 43) for MB and ICG, respectively (P = 0.041). Bilateral SLN detection was higher in the ICG group than in the MB group (88% vs 50; P = 0.002). Eleven patients (13.5%) were found to have positive nodes with at least 1 positive SLN. The sensitivity and negative predictive value of SLN were 100%. CONCLUSIONS: Real-time florescence mapping with ICG shows better overall detection rate and bilateral mapping than MB alone. In our pilot study, the differences are statistically significant. The higher number of bilateral mapping of ICG may increase the quality of life and recovery of women by reducing the need for complete lymphadenectomy.