title: Linkage analysis confirms heterogeneity of hereditary gingival fibromatosis.
abstract: OBJECTIVE
  Hereditary Gingival Fibromatosis (HGF) is a rare benign fibrous lesion of the gingival tissues presumably caused by single gene defects. The aim of this study was to identify the genetic defect leading to HGF in an extended pedigree.
  
  
  METHODS
  We report the clinical features and genetic analysis of a family affected by HGF. A total of 17 subjects were assessed clinically and had blood samples taken for DNA extraction. Multipoint parametric linkage analysis was performed to identify the possible chromosomal location responsible for HGF in this family.
  
  
  RESULTS
  Presence of severe HGF associated with tooth impaction was confirmed for seven members of this three-generation family. Linkage analysis revealed that loci on chromosomes 7, 10, 13, 15, 16, 17, 19 and 20 were linked to this trait. Previously found mutations in the SOS1 and GINGF loci were therefore excluded by this analysis.
  
  
  CONCLUSIONS
  This study brings further evidence for genetic heterogeneity of HGF and points towards the existence of different, not-yet-identified genes linked to this condition.
authors: Periodontology Unit and Department of Clinical Research, University College London, Eastman Dental Institute and Hospital, London, UK.
authors: L
authors: L
authors: Nibali
authors: A
authors: A
authors: Medlar
authors: H
authors: H
authors: Stanescu
authors: R
authors: R
authors: Kleta
authors: U
authors: U
authors: Darbar
authors: N
authors: N
authors: Donos
mesh_terms: D000293:Adolescent; D002874:Chromosome Mapping; D002879:Chromosomes, Human, Pair 10 / Q000235:genetics; D002882:Chromosomes, Human, Pair 13 / Q000235:genetics; D002884:Chromosomes, Human, Pair 15 / Q000235:genetics; D002885:Chromosomes, Human, Pair 16 / Q000235:genetics; D002886:Chromosomes, Human, Pair 17 / Q000235:genetics; D002888:Chromosomes, Human, Pair 19 / Q000235:genetics; D002890:Chromosomes, Human, Pair 20 / Q000235:genetics; D002897:Chromosomes, Human, Pair 7 / Q000235:genetics; D005260:Female; D005351:Fibromatosis, Gingival / Q000235:genetics*; D018740:Genetic Heterogeneity; D008040:Genetic Linkage / Q000235:genetics*; D056426:Genetic Loci / Q000235:genetics; D006801:Humans; D008126:Lod Score; D008297:Male; D010375:Pedigree; D014095:Tooth, Impacted / Q000235:genetics