PMID- 8287226 OWN - NLM STAT- MEDLINE DCOM- 19940218 LR - 20041117 IS - 1052-9551 (Print) IS - 1052-9551 (Linking) VI - 2 IP - 1 DP - 1993 Mar TI - Analysis of chromosome aneuploidy in ovarian dysgerminoma by flow cytometry and fluorescence in situ hybridization. PG - 50-6 AB - We determined the DNA ploidy and the centromeric copy number of chromosomes 7, 12, 18, and X in four cases of ovarian dysgerminoma using DNA flow cytometry and fluorescence in situ hybridization (FISH) with chromosome-specific alpha-satellite probes. The analyses were performed on nuclei isolated from paraffin-embedded tissue. The DNA index of the tumors ranged from 1.75 to 2.08 (near tetraploid). The FISH analysis demonstrated five copies of chromosome 7 and four copies of chromosome 12 in most tumors. The copy number of chromosome 18 ranged from two to four. The X chromosome was present in three copies in most tumors. These data show that the aneuploidy profile of dysgerminoma is similar to that of testicular seminoma. Overrepresentation of chromosomes 7 and 12 and under-representation of chromosome 18 are characteristic cytogenetic features of seminoma. Seminoma and dysgerminoma share the same chromosomal marker, an isochromosome i(12p). Our data suggest that these tumors are also characterized by a similar, nonrandom pattern of chromosome gains and losses. FAU - Gibas, Z AU - Gibas Z AD - Department of Pathology and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107. FAU - Talerman, A AU - Talerman A LA - eng PT - Journal Article PL - United States TA - Diagn Mol Pathol JT - Diagnostic molecular pathology : the American journal of surgical pathology, part B JID - 9204924 RN - 0 (DNA, Neoplasm) SB - IM MH - Adult MH - *Aneuploidy MH - Child MH - DNA, Neoplasm/*genetics MH - Dysgerminoma/*genetics/pathology MH - Female MH - Flow Cytometry MH - Humans MH - In Situ Hybridization, Fluorescence MH - Ovarian Neoplasms/*genetics/pathology EDAT- 1993/03/01 00:00 MHDA- 1993/03/01 00:01 CRDT- 1993/03/01 00:00 PHST- 1993/03/01 00:00 [pubmed] PHST- 1993/03/01 00:01 [medline] PHST- 1993/03/01 00:00 [entrez] PST - ppublish SO - Diagn Mol Pathol. 1993 Mar;2(1):50-6.