Multicentre, randomised controlled trial of adjuvant chemotherapy in cervical cancer with residual human papilloma virus DNA following primary radiotherapy or chemoradiotherapy: a study protocol.

introductionThe role of adjuvant chemotherapy after radical radiotherapy (RT) or chemoradiotherapy (CRT) in cervical cancer awaits further confirmation. Evidences have shown that persistent human papilloma virus (HPV) DNA in exfoliated cell post-RT is a potential biomarker of subclinical residual disease and thus increases the risk of recurrence. In this prospective, multicentre, randomised controlled trial, we will use HPV DNA in exfoliated cell to identify patients with cervical cancer who received definitive RT or CRT with higher risk of relapse for adjuvant chemotherapy. METHODS AND ANALYSIS: Eligible patients with histologically confirmed cervical cancer stage IIA2 to IVA of the International Federation of Gynaecology and Obstetrics, adequate organ function and no locoregional disease or distant metastasis after completion of primary treatment will be screened for HPV DNA in exfoliated cell at 1 month post-RT. Patients with undetectable HPV DNA will undergo standard surveillance. Patients with detectable HPV DNA will be randomly assigned to either adjuvant chemotherapy with docetaxel and nedaplatin for four cycles (arm 1) or observation (arm 2). Patients will be stratified for primary treatment (RT vs CRT). The primary endpoint is relapse-free survival. ETHICS AND DISSEMINATION: This protocol received a favourable ethical opinion from the Ethics Committee of the Second Affiliated Hospital of Fujian Medical University on 6 February, 2018, (No. 28). The trial results will be published in peer-reviewed journals and presented in conferences. A summary of the findings will be made available to participants. TRIAL REGISTRATION NUMBER: ChiCTR-IIR-17012655; Pre-results.