Glossitis Geographic tongue, also termed benign migratory glossitis, is a common condition which usually affects the dorsal surface of the tongue. It is characterized by patches of depapillation and erythema bordered by a whitish peripheral zone. These patches give the tongue the appearance of a map, hence the name. Unlike glossitis due to nutritional deficiencies and anemia, the lesions of geographic tongue move around the tongue over time. This is because in geographic tongue, new areas of the tongue become involved with the condition whilst previously affected areas heal, giving the appearance of a moving lesion. The cause is unknown, and
National Farm Medicine Center National Farm Medicine Center The National Farm Medicine Center (NFMC), established in 1981, is a non-profit program in Marshfield, Wisconsin dedicated to agricultural health and safety research, and service. The center is a component of the Marshfield Clinic Research Foundation, which is part of Marshfield Clinic. In the 1960s research was conducted by the Marshfield Clinic Research Foundation on respiratory diseases common in dairy farmers. Dean Emanuel identified maple bark disease among paper mill workers. In 1964, a culture technique developed by Emanuel and Fritz Wenzel to identify the causative agent for "farmer's lung", a chronic, progressive, inflammation in the