Résumé : This article focuses on the problems which the anaesthetist faces in the preoperative evaluation of patients with cancer and the specific aspects of this consultation. The multidisciplinary approach to the care of patients with cancer demands an understanding of all aspects of its treatment. Chemotherapy, radiotherapy and surgery are often combined and are very successful. Both the anatomic and physiologic alterations resulting from the presence of a malignancy as well as the consequences of previous and concurrent therapy may have profound effects on the perioperative management of the patient. The awareness and treatment of specific cancer related problems, allows optimal anesthetic care and the management of acute and chronic pain and terminal illness.