title: Extended genetic alterations in a patient with pulmonary sarcoidosis, a benign disease.
abstract: BACKGROUND
  Genetic alterations at the microsatellite level have been detected in various human malignant tissues, but have also been found in chronically inflamed tissues. Sarcoidosis is a benign disease of unknown etiology characterized by chronic inflammation, which may be associated with an increased incidence of developing malignancy.
  
  
  METHODS
  We examined the microsatellite alterations in a sputum cytological specimen of a patient with sarcoidosis. The DNA electrophoretic pattern of sputum was compared with that of the peripheral blood. Thirty-two microsatellite markers located at chromosomes 2p, 3p, 8p, 9p, 9q, 17p, 17q were used to reveal genetic alterations.
  
  
  RESULTS
  Loss of heterozygosity (LOH) was detected in eleven markers in loci 2p, 9p, 9q and 17q. LOH was observed in all four markers spanning the chromosomal arm 17q11.2-q21, suggesting a potential chromosomal deletion.
  
  
  CONCLUSIONS
  The observation of LOH in all four markers spanning the chromosomal arm 17q11.2-q21 may suggest a potential for malignancy development in this patient, or may be linked to the aetiopathogenesis of sarcoidosis. Further microsatellite fine mapping and clinical follow up of this patient are needed to clarify this.
authors.affiliation: Department of Pneumonology, Medical School, University of Crete, Heraklion, Greece. d.vassilakis@ic.ac.uk
authors.forename: D A
authors.initials: DA
authors.lastname: Vassilakis
authors.forename: G
authors.initials: G
authors.lastname: Sourvinos
authors.forename: P
authors.initials: P
authors.lastname: Pantelidis
authors.forename: D A
authors.initials: DA
authors.lastname: Spandidos
authors.forename: N M
authors.initials: NM
authors.lastname: Siafakas
authors.forename: D
authors.initials: D
authors.lastname: Bouros
mesh_terms: D000328:Adult; D002872:Chromosome Deletion; D002886:Chromosomes, Human, Pair 17 / Q000235:genetics*; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D006801:Humans; D019656:Loss of Heterozygosity; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics*; D017565:Sarcoidosis, Pulmonary / Q000235:genetics*
chemical_list: D005819:Genetic Markers