Inclusion Criteria:  Patients 65 years of age and over. Histologically proven cancer: breast, lung, ovary, prostate, bladder, kidney, ear-nose-throat, colon-rectum, melanoma, sarcoma, lymphoma, myeloma, or myelodysplastic syndrome. Included before starting medical treatment (chemotherapy, hormone therapy, targeted therapy, immunotherapy or combination). Informed consent dated and signed. Patients affiliated with a French social security scheme in accordance with the French law on biomedical research (Article 1121-11 of the French Code of Public Health).  Exclusion Criteria:  Life expectancy less than 12 months. 2. Patient declining to use a tablet, computer, mobile phone or the Internet. 3. Patient not knowing how to read and understand French. 4. Technical impossibility of connecting to the Internet in the patient's living area.  5. Patient already included in this study or in another study evaluating a remote monitoring system.