<unk>  is a chronic, complex, premalignant (1% transformation risk) condition of the<unk>  cavity, characterized by juxta-epithelial inflammatory reaction and progressive<unk>  of the<unk> al tissues (the lamina propria and deeper connective tissues). As the disease progresses, the<unk>  mucosa becomes fibrotic to the point that the person is unable to open the mouth. The condition is remotely linked to<unk>  cancers and is associated with areca nut and / or its by-products chewing, majorly practiced in South and South-East Asian countries. The incidence of<unk>  has also increased in the western countries due to the changing habits and constant migrating population.
Oral submucous fibrosis
Dyskeratosis congenita
Zenker's degeneration
Van Buchem disease
Degos disease
Bromoderma
Keratomalacia
Kyrle disease