Impact of tumour histology on survival in advanced cervical carcinoma: an NRG Oncology/Gynaecologic Oncology Group Study
- PMID: 29182608
- PMCID: PMC5785748
- DOI: 10.1038/bjc.2017.400
Impact of tumour histology on survival in advanced cervical carcinoma: an NRG Oncology/Gynaecologic Oncology Group Study
Abstract
Background: Based primarily on studies concerning early-stage tumours (treated surgically), and locally advanced disease (treated with chemoradiation), the prognosis for women with adenocarcinoma (AC) or adenosquamous (AS) carcinoma has been reported to be poorer than those with squamous cell carcinoma (SCCA) of the cervix. It is unclear whether differences in prognosis also persist in the setting of recurrent or metastatic disease treated using chemotherapy doublets with or without bevacizumab.
Methods: Cases were pooled from three Gynaecologic Oncology Group randomised phase III trials of chemotherapy doublets. Pearson's test was used to evaluate response rate (RR) of AC/AS vs SCCA, Kaplan-Meier method to estimate progression-free survival (PFS) and overall survival (OS), and Cox proportional hazards model to estimate the impact of histology on PFS and OS.
Results: Of 781 evaluable patients, 77% (N=599) had SCCA and 23% (N=182) AC/AS. There were no significant differences in RRs between histologic subgroups. The adjusted hazard ratio (HR) for death for SCCA vs AC/AS was 1.13 (95% CI 0.93, 1.38 P=0.23). When comparing SC/AS (N=661, 85%) to AC alone (N=120, 15%), the adjusted HR for death was 1.23 (95% CI 0.97, 1.57, P=0.09).
Conclusions: AC/AS and SCCA have similar survival in recurrent or metastatic cervical carcinoma when treated with chemotherapy doublets.
Conflict of interest statement
All the authors cite no relevant conflicts of interest related to this manuscript, except as noted below: Dr(s) Tewari (study chair/principal investigator for GOG 240), Penson (quality of life chair for GOG 240), Oaknin (Spain chair through GEICO for GOG 240), and Monk (senior author of GOG 240 and chair of the Cervix Cancer Committee of the NRG Oncology Cooperative Group and co-chair of the Gynaecologic Cancer Intergroup) were members of the scientific steering committee that conducted GOG 240. To participate in the regulatory discussions through which bevacizumab could potentially be approved for women struggling with advanced cervical cancer, these authors as well as author Eisenhauer participated on 1-2 advisory boards held by Roche/Genentech. Monk, Penson, and Tewari subsequently joined the Roche/Genentech speaker’s bureau to help review appropriate patient selection and management of bevacizumab-related adverse events with the oncology community. The institutions where Monk, Oaknin, and Tewari practice have contracted research grants with Roche/Genentech to conduct trials evaluating the anti-PD-L1 agent, atezolizumab. Roche/Genentech contracted research with institution: Monk, Oaknin, Tewari; Roche/Genentech Advisory Boards participation: Monk, Penson, Eisehauer, Tewari; Roche/Genentech Speaker’s Bureau: Monk, Penson, Tewari.
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