Three clinical situations explored the interactions between patients treated for cancer in oncology, their family caregivers working as doctors or nurses in the same establishment or service, and the healthcare team providing the patient's care, as well as the repercussions of such a context on these three players.In each situation, the patient, the family caregiver and a member of the team were interviewed using a semi-directive interview guide. The 8 interviews were recorded and transcribed in full, then subjected to thematic content analysis.The tension between "wanting to stay in their place as a relative" and facilitating/accelerating the patient's medical journey was heightened when the patient is being cared for in the institution/service in which the family's caregiver works. The healthcare team reported additional psychological pressure, but few arrangements are made by the team to support the specific nature of these situations. Various factors, such as the severity of the illness, the closeness of the relationship between the caregiver and the patient, existence of a hierarchical link between the caregiver and the team, and the presence of the caregiver on the ward, seemed to potentiate the difficulties felt by the healthcare team and the individual suffering of the caregiver.These situations generated intra- and interpersonal psychological tensions for all concerned, each oscillating between their status as family caregiver and healthcare professional, or as colleague and healthcare professional. These situations have raised ethical and psychological questions for all involved, which need to be anticipated.