A population registry trend analysis of neoadjuvant chemotherapy and incidence of ovarian, peritoneal and fallopian tube carcinomas in England 2004-2015.

Abstract

e17037 Background: Two important developments in ovarian cancer have occurred over the last decade: i) EORTC 55971 and CHORUS trials reporting neoadjuvant chemotherapy as a management strategy in advanced disease and ii) recognition of fallopian tubes as the origin of many ovarian cancers. This study examines how these have impacted on care and registry data. Methods: The National Cancer Registry and Analysis Service (NCRAS) database identified women registered with ovarian, peritoneal and fallopian tube carcinomas during 2004-15. Treatment was defined as surgical intervention or chemotherapy starting within 6 months of diagnosis. Women were grouped into: Neoadjuvant chemotherapy, Primary surgery, Chemotherapy only, Surgery only or No record of therapy. Groups were analysed by year, FIGO stage and age. Results: 66,768 women were registered with an invasive carcinoma. Disease stage was not recorded in 44%. Of the remaining (n = 36,779) 32.1% stage I/II and 67.9% had stage III/IV disease. Of the 66,768 cases, 12.5 % had Neoadjuvant chemotherapy, 28.7% Primary surgery, 15.2% Surgery only, 19.7% Chemotherapy only and 23.2% No recorded therapy. Chemotherapy only was commonest at 36% in Stage IV, whereas primary surgery was in Stage III disease at 38%. No therapy was recorded in 11% and 25% of stage III and IV disease respectively. Neoadjuvant chemotherapy use trebled with time: comparing the rate in 2004-6 to 2013-15, there was an increase from7.7% to 21.7% ( p< 0.001). Those diagnosed with primary peritoneal cancer were significantly more likely ( p< 0.001) to have neoadjuvant chemotherapy compared to other groups. Cancers of the primary peritoneal and fallopian tube make up an increasing proportion of cases from 6% in 2004 to 13% in 2015. Conclusions: This is the largest reported study assessing trends in primary therapy and cases of ovarian, peritoneal and fallopian tube cancers during a time of novel developments. Neoadjuvant chemotherapy is becoming embedded in clinical practice. The reporting and analysis of ovarian cancer should include peritoneal and fallopian tube for consistent categorisation.