ctDNA detection in patients with previously treated, HPV-induced, stage II or III invasive pelvic cancer and who are currently in post-treatment follow-up.

Patients with previously treated, HPV-induced, stage II or III invasive pelvic cancer and who are currently in post-treatment follow-up will be included.

These patients will be followed up during 30 months (2.5 years) (if no relapse occurred before) with ctDNA detection performed at each hospital visit. At each visit, clinical, biological (squamous cell carcinoma (SCC) serum marker will be done systematically) and radiological/pathology (if any) results will be prospectively collected in the study.

For the patients who have a relapse or new HPV-induced invasive cancer before 30 months, the follow-up will be discontinued at the date of the relapse.

For the patients who will have completed their follow-up for the study (2.5 years) with no relapse or new HPV-induced invasive cancer, they will be followed up for 6 months (+ 14 days), to collect any late relapse (if any). None specific study procedure will be performed during this period.

Inclusion Criteria:

1. 1) Patient curatively treated within the past 3 years for:

   • a HPV-induced stage Ib3, Ic, II or III cervix cancer
   • a HPV-induced stage II or III anal canal, vagina, vulva or penis cancer

2. Patient with no evidence of any invasive tumor at inclusion (clinical and, if any, radiological exams).

3. Age ≥ 18 years

4. Availability of HPV genotyping of the treated cancer and/or archived tumor tissue available.

5. Patient who a follow-up visit is scheduled in the including center at least twice a year.

6. Patient being affiliated to the French social security.

7. Ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria:

1. Patient presenting with active invasive tumor masses (e.g. stage IV cancer).
2. Patient deprived from ability to decide on her own or placed under the authority of a tutor.
3. Patient unable to have a regular follow up for geographical, social or psychological reasons.

Sponsor will share de-identified data sets. Documents generated under the project will be disseminated in accordance with Institut Curie policies.

Data requests can be submitted starting 9 months after last article publication and will be made accessible for up to 12 months.

Access to trial individual participant data can be requested by qualified researchers engaging in independent scientific research, and will be provided following review and approval of a research proposal and Statistical Analysis Plan (SAP) and execution of a data sharing agreement (DSA).