MedGen

Oral submucous fibrosis (OSMF) is a chronic, progressive disease that alters the fibroelasticity of the oral submucosa, prevalent in India and Southeast Asia but rare elsewhere, and characterized by burning and pain in the oral cavity, loss of gustatory sensation, the presence of blanched fibrous bands and stiffening of the oral mucosa and oro-pharynx (leading to trismus and a progressive reduction in mouth opening) and an increased risk of developing oral squamous cell cancer (3-19%). It is usually associated with the chewing of the areca nut (an ingredient in betel quid) but the exact etiology is unknown and there is currently no effective treatment. [from ORDO]

An infectious or non infectious disorder characterized by signs and symptoms derived from focal or extensive tissue infiltration by acute (e.g., polymorphonuclear) or chronic (e.g., lymphocytic-plasmacytic) inflammatory cells. Representative examples of infectious disorders include viral infections, bacterial infections, and parasitic infections. Representative examples of non-infectious inflammatory disorders include inflammatory bowel disease and inflammatory polyps. [from NCI]

Gingival fibromatosis is a rare overgrowth condition characterized by a benign, slowly progressive, nonhemorrhagic, fibrous enlargement of maxillary and mandibular keratinized gingiva (summary by Hart et al., 2002). Genetic Heterogeneity of Hereditary Gingival Fibromatosis Other loci for gingival fibromatosis have been mapped to chromosome 5q (GINGF2; 605544), chromosome 2p23.3-p22.3 (GINGF3; 609955), and chromosome 11p15 (GINGF4; 611010). GINGF5 (617626) is caused by mutation in the REST gene (600571) on chromosome 4q12. There is some evidence for a locus on chromosome 2p16-p13 (see MAPPING). [from OMIM]