Résumé : Introduction : There is very little data on the survival of elderly patients with cancer admitted to intensive care unit (ICU). The aim of the study is to evaluate in our department prognostic factors for hospital mortality and survival after hospital discharge for patients aged ≥ 65 years. Patients and Methods : Retrospective study including all patients ≥ 65 with a solid or hematological tumor admitted for an acute complication in an oncological ICU from 01/01/2012 to 31/12/2014. Results : We recorded 311 admissions for 270 patients. The main reasons for admission were cardiovascular (22 %), respiratory (17 %) and hemodynamic (13 %). ICU and in-hospital mortality rates were respectively 10 % and 22 %. The identified independent prognostic factors for higher hospital mortality were the use of non invasive ventilation (NIV) use or of invasive mechanical ventilation (IMV) use and the existence of a therapeutic limitation in the first 24 hours. After hospital discharge, independent prognostic factors for death were Charlson's score ≥ 8, SAPS II score e 37, administration of amines in the first 24 hours and the existence of a lifesustaining therapeutic limitation in the first 24 hours. A total of 77 % of patients were able to benefit from an antineoplastic treatment after hospital discharge. Conclusion : Life-sustaining therapeutic limitation is directly related to hospital mortality and postdischarge survival. However, the large majority was still able to benefit from cancer treatment.