title: Comprehensive cytogenetic characterization of an esthesioneuroblastoma.
abstract: Esthesioneuroblastoma is a malignant neuroectodermal tumor originating from olfactory epithelial cells in the nasal vault. Due to the rarity of this tumor entity, cytogenetic data are very limited. Therefore, we performed comprehensive cytogenetic analyses of an esthesioneuroblastoma, Hyam's grade III-IV, using trypsin-Giemsa staining (GTG banding), multicolor fluorescence in situ hybridization (M-FISH), and locus-specific FISH complemented by molecular karyotyping using high-density single nucleotide polymorphism arrays. GTG banding of 25 metaphases revealed 54 structural intrachromosomal aberrations, predominantly located on 2q, 6q, 21q, and 22q, which were confirmed by FISH analysis. Interestingly, we found two novel, so far not described deletions, del(2)(q37) and del(21)(q22). Using GTG banding, locus-specific FISH, and M-FISH, we detected numeric changes of chromosomes 5, 17, 19, and 22, as well as trisomy 8 at low frequency. Applying SNP array karyotyping, we confirmed the chromosomal aberrations del(2)(q37.3), del(3)(q27.2), del(10)(q26.11), chromosomal imbalance on 17q, del(21)(q22), and revealed a number of so far unknown aberrations (gain of 2q14.3, 13q33.3, and 13q34). While the cytogenetically revealed low frequency mosaic del(6)(q22q24) was not visible using SNP array karyotyping, some of the smaller imbalances (SNP array data) could not have been detected by classic cytogenetic analysis. Therefore, our study supports the usefulness of applying complementary methods for cytogenetic analysis.
authors.affiliation: Biotechnical-Biomedical Centre (BBZ) and Institute of Clinical Immunology and Transfusion Medicine, Faculty of Medicine, University of Leipzig, Johannisallee 30, Leipzig D-04103, Germany. Heidrun.Holland@medizin.uni-leipzig.de
authors.forename: Heidrun
authors.initials: H
authors.lastname: Holland
authors.forename: Ronald
authors.initials: R
authors.lastname: Koschny
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Krupp
authors.forename: Jürgen
authors.initials: J
authors.lastname: Meixensberger
authors.forename: Manfred
authors.initials: M
authors.lastname: Bauer
authors.forename: Holger
authors.initials: H
authors.lastname: Kirsten
authors.forename: Peter
authors.initials: P
authors.lastname: Ahnert
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations; D002871:Chromosome Banding / Q000379:methods; D020732:Cytogenetic Analysis; D018304:Esthesioneuroblastoma, Olfactory / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008297:Male; D009296:Nasal Cavity / Q000737:chemistry / Q000378:metabolism* / Q000473:pathology; D009669:Nose Neoplasms / Q000235:genetics* / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods; D020641:Polymorphism, Single Nucleotide; D014407:Tumor Cells, Cultured