Dermatology This branch of medicine treats diseases of the skin, skin appendages (hair, body hair, nails, etc.), and the mucous membranes of body openings. For contact information, select the facility nearest you. Locations where this service is offered MRC de Rimouski-Neigette Dermatologie - Hôpital régional de Rimouski MRC de Rivière-du-Loup Dermatologie - Centre hospitalier régional du Grand-Portage