Study on the Contribution of the Genetic Tumor Profile Obtained by Circulating Tumor DNA Analysis in the Multidisciplinary Molecular Biology Meeting of Eastern PACA

Inclusion Criteria: * Over 18 years old. * Advanced-stage malignant solid tumor managed in a non-curative context. * Patient eligible for Multidisciplinary molecular biology meeting with available archived tumor material (frozen or FFPE block, less than 5 years old) or a biopsiable tumor lesion. * Patient able to read, write, and understand the French language. * Patient has read the information sheet and signed the informed consent. * Patient has social security coverage. Exclusion Criteria: * Previous or concurrent cancer diagnosed or treated within the last 5 years, except for in situ carcinoma of the cervix, basal cell or squamous cell carcinoma of the skin, and adequately treated in situ carcinoma of the bladder. * Severe or uncontrolled systemic disease. * Any condition which, in the investigator's judgment (geographical, social, or psychological factors, etc.), makes the patient unable to comply with study follow-up and procedures. * Patient considered a vulnerable person; vulnerable persons are defined in Articles L1121-5 to L1121-8: * Pregnant women, women in labor, and breastfeeding mothers, * Persons deprived of liberty by judicial or administrative decision, individuals hospitalized without consent under Articles L. 3212-1 and L. 3213-1 who do not fall under the provisions of Article L. 1121-8, * Persons admitted to a healthcare or social institution for reasons other than research, * Adults unable to give their consent.