title: Low-level chromosome 12 amplification in a primary lipoma of the lung: evidence for a pathogenetic relationship with common adipose tissue tumors.
abstract: Cytogenetic analysis of a primary lipoma of the lung removed from a 56-year-old woman revealed the presence of a supernumerary marker chromosome in all metaphase cells analyzed; namely, 47,XX,+mar. To the best of our knowledge, this is the first cytogenetic description of a primary lipoma of lung. Genetic analysis of intramuscular lipoma, atypical lipoma, and well-differentiated liposarcoma have revealed the presence of one to three supernumerary ring or giant marker chromosomes composed of chromosome 12 segments as the characteristic anomaly. The marker chromosome in the present case was shown to be composed entirely of chromosome 12 material by subsequent analysis with a chromosome 12-specific paint probe and fluorescence in situ hybridization. Thus, analogous to intramuscular lipoma, atypical lipoma, and well-differentiated liposarcoma, extra chromosome 12 material is present. These findings support a pathogenetic relationship between this lipoma of unusual anatomic location and common adipose tissue tumors.
authors.affiliation: Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha 68198-5400, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Bridge
authors.forename: C A
authors.initials: CA
authors.lastname: Roberts
authors.forename: J
authors.initials: J
authors.lastname: Degenhardt
authors.forename: C
authors.initials: C
authors.lastname: Walker
authors.forename: R
authors.initials: R
authors.lastname: Lackner
authors.forename: J
authors.initials: J
authors.lastname: Linder
mesh_terms: D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002881:Chromosomes, Human, Pair 12; D005260:Female; D005784:Gene Amplification; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008067:Lipoma / Q000000981:diagnostic imaging / Q000235:genetics* / Q000473:pathology; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000235:genetics* / Q000473:pathology; D008875:Middle Aged; D018205:Neoplasms, Adipose Tissue / Q000235:genetics* / Q000473:pathology; D014057:Tomography, X-Ray Computed