Barretos Cancer Hospital

Breast cancer is the most common cancer in women globally, with 2.3 million new cases diagnosed in 2020. Hormone receptor positive (HR+), human epidermal growth factor receptor 2 negative (HER2-) breast cancer is the most prevalent subtype, comprising 69% of all breast cancers in the USA. Within the tumor immune microenvironment, a higher intensity of myeloid cell infiltration and low levels of lymphocyte infiltration have been associated with worse outcomes. Markers in peripheral blood have emerged as predictive biomarkers that can be easily obtained non-invasively and at low cost. Experiments have confirmed the relative components of these tests (such as the immune cells) directly or indirectly participated in tumour occurrence, development, and immune escape, underscoring the potential use of laboratory tests as tumour biomarkers

The goal of this clinical trial is to identify the immunophenotypic profile of the local immune response, the cervicovaginal microenvironment and the microbiological profile of women with CIN 3 treated with imiquimod. Participants will be divided in 3 groups: CIN 3 who will use 16 doses of imiquimod in the uterine cervix, applied twice a week and will be treated with LEEP procedure; 2) patients with CIN 3 who will undergo standard treatment with LEEP procedure; 3) patients with negative cytology and HPV (human papillomavirus) test. Blood and cervicovaginal lavage collections will be performed at different times, for comparisons between cellular response profiles to imiquimod during treatment and baseline levels in healthy patients.