Feasibility Study to Evaluate a Digital Tool for Monitoring Patients Who Have Discontinued Treatment for Chronic Myeloid Leukemia

The objective of this project is to evaluate, over a 12-month period, the feasibility of integrating a digital tool into the follow-up care of patients with chronic myeloid leukemia who have been off treatment for up to 2 years. Feasibility will be assessed based on the usage rate, defined as the proportion of patients who accessed the digital tool at least: * once a month, if treatment discontinuation was ≤ 6 months; * once a quarter, if treatment discontinuation was \> 6 months. The usage rate will be assessed and compared to a threshold of 60%; if the rate falls below this threshold, feasibility will be considered insufficient.