This manuscript is based on nine triadic medical consultations which are analysed following DA approaches, in order to get an insight into the participatory roles that unfold in the visits between a cancer specialist, his patients and patients’ companions. Natural recordings form the corpus of this study conducted in Santiago, Chile. Every consultation is fully transcribed to identify the role that companions played in the event, the conversational strategies most frequently used, and to investigate whether their contribution helped or impeded the communication. The analysis reveals seven roles that companions utilized during the medical visit, two of them are prominent and will be studied in detail in this paper. Through the discourse, communicative strategies that monitor patients’ health and wellbeing are revealed and illustrate the interpersonal relationships that participants have developed throughout the course of the disease.