This issue, primarily written in French, contains articles by researchers in the fields of linguistics and social sciences and by health care professionals. The articles include the following: "The Collective Working Out of Medical Knowledge" (Lorenza Mondada); "Involvement and Constraint in a Surgical Consultation Room" [written in English] (Tiago Moreira); "Intervention from a Distance in Surgical Operations: Interactive Organization of Participation Spaces" (Lorenza Mondada); "Patients' Expertise in Working Out the Medical Diagnosis. Linguistic Analysis of Interviews with Patients with Epileptic and Non-Epileptic Disorders" (Ingrid Furchner and Elisabeth Gulich); "Expert and Lay Formulation of 'Normality' in Genetic Counseling" [written in English] (Srikant Sarangi); "Medical Expertise as Public Discourse: The Discussion on Medically Assisted Procreation" (Alain Bovet;) "Communication Between Caregivers and Migrant Patients" (Myriam Graber, Maria Eugenia Molina, Myriam Graber, and Andreina D'Onofrio); "Authoritative Points of View on Medical Consultation Subject to Translation" (Pascal Singy); "Linguistic Barriers and Communication in a Medical Outpatient Clinic" (Alexander Bischoff, Louis Loutan, and Hans Stalder); "Minorities and Health: Discursive Formations of Francophone Communities and Institutions in Toronto" (Normand Labire, Adrienne Chambon, Monica Heller, Fasal Konoute, Amal Madibbo, and John Maury); "Application of Linguistic Laws in Hospital Policies and the Emergency Network in the Capital City of Brussels: Balancing the Supply and Demand of a Multilingual and Multicultural City" (Myriam Verkouter); "Medical Discourse and Young Homosexual Men: Presentation of a Study Underway" (Pascal Singy, Pierre Cochand, Gilles Dennler, and Orest Weber). (AS)