The primary objective of this study is to compare 2-year compliance with the personalized post-treatment surveillance plan between the two arms.~The secondary objectives are to compare between the two arms :~Long-term compliance (5-year follow-up)~Use of care~Oncological events and their management~Supportive care needs~The exploratory objectives are to :~Evaluate the costs in terms of medical transportation~Evaluate and compare patients' satisfaction and psychological well-being (in terms of anxiety/depression)~Evaluate the homogeneity of the impact of the intervention according to covariates (gender, tumor pathology, occupational status, and center)~Evaluate the reasons for recruitment failures
This is a multicenter, interventional, randomized study among adult patients recently diagnosed with a rare tumor (<12 months). The study will aim to compare compliance with the personalized post-treatment surveillance plan, established for each patient according to national guidelines, when the surveillance is conducted in person by a hospital-based physician (control arm) or remotely by a trained nurse (experimental arm).