Oral Submucous Fibrosis by definition is an Insidious, chronic disease affecting any part of the oral cavity and sometimes pharynx; although occasionally preceded by and/ or associated with vesicle formation, it is always associated with a Это и многое другое вы найдете в книге Oral Submucous Fibrosis: An Update (Girish Dongarwar,Rahul Bhowate and Shirish Degwekar)