Versatile Ampification Single-Molecule Detection in Liquid Biopsy

• Blood sampling in addition to the blood normally required for their clinical management (Procedure): Patients will undergo blood sampling in addition to the blood normally required for their clinical management. The study aims to collect 50 blood samples (one to 4) from 20 patients undergoing treatment in the adjuvant or advanced (metastatic) setting, as per standard of care. The first blood sample (T1) will be carried out immediately before the treatment, the subsequent blood samples (T2-T4) will coincide with the periodic radiographic re-evaluations, typically at months 3 and 6 (M3 and M6, T2 and T3), and at progression/recurrence, if and when recorded.
• Blood plasma and circulating tumor DNA (ctDNA) (Procedure): Blood drawing by venepuncture (elbow) in K2EDTA vacutainers to obtain blood plasma.The patients will otherwise receive the most appropriate treatment for their condition. The following data will be collected and pseudo-anonymised: demographic data (age and gender), histopathology including primary and metastatic sites, BRAF status, medical imaging, previous therapies assigned if any

Primary outcomes

• Pilot study, descriptive statistics will be adopted (frequency, average, standard deviation, median, interval). Concordance indexes will be calculated, e.g. between dPCR and ELISA assays on the one hand and Versilib data on the other. [48 months]: Concordance will determine whether the Versilib approach is technically feasible, e.g. whether method is sound, tests meet minimal requirements (technical sensitivity, reproducibility, accuracy). False positives and false negatives will be assessed. The results of descriptive statistics will be the basis to elaborate specific hypotheses (e.g. clinical scenarios) that will be the subject of future studies.

Sex: All, ages: 18 Years to any

Inclusion Criteria:

* age: ≥ 18
* PFS≤2
* Patients willing to sign an informed consent;
* Confirmed (cytologically or histologically) cutaneous melanoma diagnosis
* Confirmed BRAF p. V600E tumor status
* Eligible for BRAFi/MEKi treatment or Immune checkpoint blockade in either the adjuvant or advanced settings (the latter typically stages III/IV, high risk).

Exclusion Criteria:

* Life expectancy <8 weeks
* Other clinical conditions preventing blood drawing compliance, as per physician's choice.