Analysis of kidney tumors by comparative genomic hybridization and conventional cytogenetics.
Comparative genomic hybridization (CGH) and conventional cytogenetic karyotyping were used to screen for losses and gains of DNA sequences along chromosomes in ten renal tumors (RCC) of different histologic types (clear-cell RCC, papillary RCC, and one oncocytoma). Loss of 3p was the most common change in clear-cell RCC. All papillary tumors, either adenomas or carcinomas revealed gains of chromosomes 7 and 17q without limitation to size and grade. Homozygotic loss of the pseudoautosomal Xp or Yp region was detected in three RCC tumors. A dicentric (Y;14) was present as the sole chromosome abnormality in the oncocytoma. Both techniques showed concordant results in tumors with homogeneous karyotype. However, in tumors with several composite clones some discrepancies were observed, especially in cases of clear-cell RCC where chromosomal abnormalities present in a low number of metaphases could not be detected by CGH.
Rigola
Maria Angels
MA
Institut de Biotecnologia i Biomedicina, Universitat Autónoma de Barcelona, Bellaterra, Spain.
Casadevall
Carme
C
Bernués
Marta
M
Caballín
Maria Rosa
MR
Fuster
Carme
C
Gelabert
Antoni
A
Egozcue
Josep
J
Miró
Rosa
R
D002292:Carcinoma, Renal Cell / Q000235:genetics* / Q000473:pathology; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D002872:Chromosome Deletion; D002874:Chromosome Mapping; D002886:Chromosomes, Human, Pair 17; D002897:Chromosomes, Human, Pair 7; D003582:Cytogenetics; D006801:Humans; D007621:Karyotyping; D007680:Kidney Neoplasms / Q000235:genetics* / Q000473:pathology; D009693:Nucleic Acid Hybridization