The WARNING project proposes a new care organisation for older patients with cancer. The aim is to optimise management in daycare with early detection signs of geriatric syndromes and specific interventions. This prevention package, called the 'WARNING Pack', includes a specific multimodal geriatric management guide for the oncologist (physician form), based on patient-reported early geriatric warning signs (patient form). Primary outcome is to reduce the risk of deterioration in global quality of life at 6 months during treatment and to prevent the onset of geriatric syndromes.

Inclusion Criteria:

• Patients aged ≥75 years.
• Patients with confirmed solid cancer or haematological malignancy, regardless of
• the site of the tumour (single or multiple), - the duration of the disease, or - the treatment modality (adjuvant, neoadjuvant, locally advanced, palliative metastatic).
• Patients starting a first line of systemic treatment or a new line of treatment after a break of at least six months.
• Patients treated in a daycare hospital.
• Persons belonging to or benefiting from a social security scheme.
• Free and informed consent after receiving appropriate information.

Exclusion Criteria:

• Patients under legal protection (guardianship, curatorship).
• Persons with enhanced protection, i.e. persons deprived of their liberty by a judicial or administrative decision, persons in a health or social care institution, persons under legal protection and patients in emergency situations.