There are communication difficulties on the distress between the patient and the doctor, in part due to the gap between the perceptions of the patient and the caregiver. Indeed, many studies have highlighted the important differences existing between subjective psychosocial needs of the patient and the physician's ability to detect them. In particular, the study of Fallowfield on nearly 2300 medical consultations shows that only 29% of patients whose threshold of distress is clinically significant are identified by their doctors. Similarly, the synthesis carried out in 2005 by Thorne et al. reported the impact of failures of communication between clinicians and patients on the psychosocial experience of illness and treatment, symptom management, decision making and quality of life.